MASTER ELECTRICIANS 2018 WIRING RULES ROADSHOWS

Transcription

1 New text Deleted text Comment Reference MASTER ELECTRICIANS 2018 WIRING RULES ROADSHOWS BERNIE MCLAUGHLIN Chief Executive Officer Master Electricians NZ A Thorndon Quay, Wellington ALEC KNEWSTUBB Wiring Expert masterelectricians.org.nz

2 Master Electricians New Zealand, 220A Thorndon Quay, Wellington, 2018.

3 New text Deleted text Comment Reference CONTENT ABOUT MASTER ELECTRICIANS 4 THIS DOCUMENT 5 SECTION ONE 6 SECTION TWO 11 SECTION THREE 23 SECTION FOUR 27 SECTION FIVE 38 SECTION SIX 45 SECTION SEVEN 48 SECTION EIGHT 57 APPENDICES 61

4 ABOUT MASTER ELECTRIC IANS ABOUT M. E. 4. Master Electricians is a professional trade organisation for the electrical contracting industry in New Zealand. Our membership is made up of over 1100 businesses which we actively support and advocate for. As New Zealands only electrical contracting trade organisation, we communicate with government, regulatory bodies, industry stakeholders and the public over a wide range of topics pertinent to the success of the industry. Master Electricians is well known by consumers for quality above all else. Members operating under the Master Electricians brand can be identified as a quality assured contractor as adherent to the Master Electricians membership guidelines. In addition to this, our members receive a suite of benefits in the form of business support, technical support and a wide range of financial benefits. 5.

5 New text Deleted text Comment Reference This document serves the purpose of a summary of changes set to come out with the release of the revised standard AS/NZS Please note that these are paraphrased descriptions and sentences may vary to the impending release. All information was supplied and worded by a member of the standards committee responsible for these changes, therefor, although this may not be a direct replica, all educational information is accurate as dated to the most recent draft. All information is to give a general guide as to the changes coming. AS/NZS 3000 THIS DOCUMENT 5.

6 SECTION ONE SCOPE, APPLICATION AND FUNDAMENTAL PRINCIPLES Standard description This Standard sets out requirements for the design, construction and verification of electrical installations, including the selection and installation of electrical equipment forming part of such electrical installations. These requirements are intended to protect persons, livestock, and property from electric shock, fire and physical injury hazards that may arise from an electrical installation that is used with reasonable care and with due regard to the intended purpose of the electrical installation. In addition, guidance is provided so that the electrical installation will function correctly for the purpose intended and takes into account mitigating the foreseeable adverse effects of disruption to supply. 1.1 Scope New paragraph added: In addition, guidance is provided so that the electrical installation will function correctly for the purpose intended and takes into account mitigating the foreseeable adverse effects of disruption to supply. SECTION ONE 6.

7 1.4 Definitions There are 28 new definitions added, 10 existing definitions revised and 1 definition removed (duct). Definitions from Electricity Act or ESRs over-rule definitions in this standard. Refer to ESR 4, paragraphs (2) and (4). The below are detailed examples of some of these new/revised definitions, all of which will be noted in the new standards for you to reference in the above noted section (1.4). Accessible Capable of being reached for inspection, maintenance or repairs New text Deleted text Comment Reference Readily Accessible Capable of being reached quickly and without climbing over or removing obstructions, mounting upon a chair, or using a movable ladder; and in any case not more than 2.0 m above the ground, floor or platform. Adjacent Next to or adjoining without obstruction and in any case no more than 1.25M away (arms reach). Alteration An adjustment, change or modification to, or deletion or replacement of, a part(s) of an electrical installation. Note: Repairs are not alterations. Repair The work to restore the electrical installation to safe and sound working condition after deterioration or damage has occurred. Previously many references to Alterations, additions and repairs. All now classified as either Alteration or Repair because an addition is a type of alteration. Normal supply The source of supply that the electrical installation is supplied from under normal conditions of operation. Note: The normal supply is usually from a distribution network, but may instead be from a generation system. Alternative supply A supply system intended to maintain the functioning of an electrical installation or a part or parts thereof, in case of interruption of the normal supply. Supplementary supply A supply system intended to operate in conjunction with the normal supply. SECTION ONE Electrical installation, residential An electrical installation or that portion of an electrical installation associated solely with a living until or units. Example: Residential institutions, hotels, boarding houses, hospitals, accommodation houses or motels. Previously defined only with clause 2.6.3(RCDs); But now used in other clauses 7.

8 Main switch A device or devices, whos primary function is the isolation of supply to the electrical installation by the customer. This device may also fulfill regulatory requirements provided it is labeled accordingly. The key here is who is expected to use the switch; e.g. meter isolators are NOT mains switches. Mains switches are either at the main switchboard or at a DB where an alternative or supplementary supply is connected. Arc fault detection device (AFDD) A device intended to mitigate the effects of arcing faults, within installation wiring and plug and lead connection of electrical equipment, by disconnecting the circuit when an arc fault is detected. Some other definitions added to the most recent draft include: Electric vehicle Energized De-energised Live Fire mode Functional unit Lamp Lift Protective earth neutral (PEN) SECTION ONE Socket outlet Multiple combination Socket outlet RCD (SRCD) Soft wiring Some other amended definitions include: Authorised person MEN system Outbuilding Point (in wiring) 8.

9 Protective earthing conductor New text Deleted text Comment Reference Safety service Protection by barriers or enclosures The IP rating shall suit the environmental conditions and relevant mounting position as specified by the manufacturer. This is the new requirement. Required degrees of protection unchanged Design of an electrical installation An electrical installation shall be designed to; a) Protect persons, livestock and property from harmful effects; b) Function correctly as intended; c) Connect, operate safely and be compatible with the electricity distribution system, or other source of supply, to which the electrical installation is to be connected; d) Facilitate safe operation, inspection, testing and maintenance; e) Minimise reduce inconvenience in the event of a fault. NOTE: Consideration should be given to the provisions of Appendix M concerning the disruption of supply Installation work practices Requirement to clearly ID conductor function unchanged. Restriction on G, Y, & G/Y colours for installation or sleeving (earthing only) unchanged. New restriction on sheath colour: f) Live conductors shall not be insulated or sheathed with green, yellow or green/ yellow combination colours in installation wiring. NOTE: NZ exception added. Colour does not matter. SECTION ONE i) Condensation issues installation of breathing/pressure equalisation valve to assist in changes in humidity and drainage of moisture. j) Electrical equipment shall be installed to manufacturers instructions to ensure that the marked IP rating is maintained. The above is the first of several new rules requiring manufacturers instructions to be followed. Previously manufacturers instructions were only mandated in Part 1. Unless cable entries/breathers/drains are specifically allowed for by manufacturers instructions, you must not drill a hole in an enclosure. The enclosure s IP rating will be destroyed. The use of a proper breather will be required in most cases. 9..

10 1.9.4 Compliance by specific design ly called Part 1 solution Identification On the adoption of a Part 1 solution in relation to an electrical installation, the main switchboard of the installation where the Part 1 solution has been adopted, any other switchboard that is associated with the Part 1 solution, shall be clearly and permanently marked with the intent of the following words: Warning: Part or parts of this installation adopt a Part 1 solution under AS/NZS 3000 as shown in the documentation. SECTION ONE 10..

11 SECTION TWO New text Deleted text Comment Reference GENERAL ARRANGEMENT, CONTROL & PROTECTION This Section specifies the minimum requirements for the selection and installation of switchgear and control-gear that shall be achieved to satisfy Part 1 of this Standard Selection and installation Switchgear and control-gear shall be selected and installed to perform the following functions or have the following features: f) Installed in accordance with the manufacturer s instructions. 2.2 Arrangement of installation Circuits NOTE: Specific design and equipment may need to be considered to ensure the continuity of supply. For further guidance, refer to Appendix M Origin of submains and final subcircuits Every submain and every final subcircuit shall commence at a main switchboard or at a distribution switchboard. All of the live conductors of one submain or one final subcircuit shall commence at the one switchboard Electric vehicle charging circuits Note: In Australia, guidance for installations for electric vehicle charging circuits is provided in appendix P of AS/NZS Electric vehicle charging circuits Note: In Australia, guidance for installations for electric vehicle charging circuits is provided in Appendix P. No clause, just a note; placed here because this is the logical place where people would look. Labeled as AU only, but actually applies in NZ also. Should also be a NZ note pointing to clause 7.9. SECTION ONE Maximum demand (c) Measurement The maximum demand may be determined by the highest rate of consumption of electricity recorded or sustained over a period of minutes when demand is at its highest by a maximum demand indicator or recorder. 11.

12 2.3.2 Control AC systems Note: Warning regarding neutral connections. The manual disconnection and connection of neutral conductors must be as follows: the active must be disconnected before the neutral the neutral must be connected before the actives Refer to AS/NZS 4836 for safe work practices Main switches Where multiple supplies are provided, each supply shall be controlled by a main switch or switches on the main switchboard for each supply. Exception: Main switches for alternative or supplementary supplies may be located at any switchboard within the installation, provided they are installed in accordance with an applicable standard, for example, AS/NZS 3010 or AS/NZS Location & Operation (b) Main switches, operating handles or controls associated with such a main switch shall be manually operated, single action, mechanical and shall consist of a handle, lever, push buttons or similar device. Electronic touch screens, programmable control systems or the like shall not be used as a means of operating main switches. Electronic touch screens may be used for remote control of main switches as per clause SECTION TWO Identification Main switches shall be identified as follows: (e) Main switches for supplementary or alternative supplies shall be labeled to indicate the energy source. Alternative supplies are those such as; solar/inverter supply or generator Remote Control (c) Where remote control facilities also provide the capability for a main switch to be closed (iii) shall not be capable of being overridden or bypassed by programmable control systems or the like. (d) Where a touch screen, programmable control system or the like is used for the remote control of one or more main switches the requirements for main switches as per clause (b) shall apply. 12.

13 2.5 Protection against overcurrent New text Deleted text Comment Reference Consumer mains New explanation (with Fig) of what is, and isn t, unprotected consumer mains. Not relevant for NZ, because ESR 32 prohibits unprotected consumer mains. Advice added to 4 Notes e.g. Note 2: An electricity distributor s low voltage service protective device may provide overload and short-circuit protection for consumer mains and may satisfy Clause under certain conditions. Negotiation with the electricity distributor during installation planning stage is recommended. ESR 32 requires network to provide short circuit & fault protection for mains, but does NOT require overload protection. 2.5 Overcurrent protection All new Figs, plus 2 new; but no change to requirements supply circuit discrimination A number of changes to this clause, for example: (a) 2 x circuit breakers (iii) C2 (downstream) rated up to 250 A Discrimination deemed to be provided where C1 (upstream) is > / = 1.5 x the downstream breaker. E.g. 63 amp MCB main switch and a 40 amp MCB sub mains Current edition: 40 x 2 = 80 Now: 40 x 1.5 = Additional protection by RCDs What are RCDs are additional to? SECTION TWO Note to tells us The use of RCDs is intended only to augment other measures of basic protection. Clause lists acceptable methods of basic protection (Insulation, barriers, Obstacles, Placing out of reach). RCDs are not listed, and are specifically stated as: not recognised as sole means of basic protection but may be used to augment one of the above methods. 13.

14 tells us RCDs are recognised as a means of providing automatic disconnection of supply i.a.w So RCDs are: a complete method of fault protection; and Supplementary to accepted methods of basic protection RCDs: Note 3 ( re 10 ma RCDs ) Suggested possible uses deleted; to avoid the advice being used in court as: Why didn t you follow the recommendation in the Standard, Mr Sparky? Selection & Arrangement SECTION TWO Types of RCD Common belief that pretty much any RCD will do the job Increased use of highpower electronics etc; means this is no longer true. Use of the wrong type of RCD doesn t just result in nuisance tripping. It can mean the RCD doesn t trip when it should. This doesn t mean the RCD is faulty it means we need to learn how to select an appropriate RCD for the circuit. There are (at least) 2 different groups of Types of RCD. Types I, II, III, etc; classified by rated residual current- Specified in AS/NZS Types A, AC, B, F, etc; classified by waveform reacted to. RCDs can also be classified by trip time. Type I (max 10 ma). Both countries use Type I (fast trip) for medical. NZ uses Type I (normal trip) for schools. Type II (up to 30 ma). Both countries use Type II for general purpose. Currently Au uses Type AC (sine wave). NZ uses Type A (sine wave + pulsing DC). Type III (up to 300 ma), sometimes used for fire protection, likely to be required for fault protection of TT- supplied installations. Type IV (up tp 300 ma, with built-in delay) RCDs used for fire protection only, may be Type IV. High-power electronics may need Type F e.g. inverter supplies. EV chargers will generally need Type B Locations where RCDs are required Completely re-written; with different structure (and new heading). Originally as one common clause for both countries (with separate non-domestic subclauses). Then Au backed away from a couple of key provisions, so now only the introduction is common Locations where RCDs are required - overview Establishes how this clause fits with other RCD requirements Installation requirements Australia

15 Domestic & Residential New text Deleted text Comment Reference Non-Domestic & Non-Residential Home care installations Alterations to installations and replacement of switchboards Repairs Locations where RCDs are required - overview Installation requirements New Zealand Residential installations Non-residential installations Home care installations Additions and alterations The requirements of this Clause for the installation of RCDs are in addition to the RCD requirements for electrical installations as specified in : (a) other Australian and New Zealand Standards, e.g. AS/NZS 3001, AS/NZS 3002, AS/NZS 3003, AS/NZS 3004, and AS/NZS The requirements of this Clause for the installation of RCDs are in addition to the RCD requirements for electrical installations as specified in : (b) other Sections of this standard, e.g. (i) Section 3 for protection against mechanical damage; (ii) Section 6 for baths, showers and other water containers; and (iii) Section 7 for specific electrical installations; and SECTION TWO (c) the requirements and regulations of legislation, such as Occupational Health and Safety Legislation. Note: In New Zealand, attention is drawn to the requirements of NZECP 55 for wiring and fittings located near conductive thermal insulation. 15.

16 Residential installations New Zealand No change to clause. Subcircuits supplying: - sockets, lights, and hand-held equipment. Change to all final subcircuits had been intended (for both countries) dropped due to increased cost (politics). May happen in Amendment 1. Some Exceptions deleted: Home Dialysis - not needed; the provisions are cumulative; If it s both residential & Home care ; then BOTH rules apply. Alterations & Repairs - Not needed; provisions are alternative; It s either a new subcircuit or it s an existing one. New Exception added: This requirement need not apply to a final subcircuit for which a method of fault protection other than automatic disconnection of supply is applied, e.g. a separated supply in accordance with Clause 7.4 or supply at extra low voltage in accordance with Clause 7.5. New; needed because pointless to install an RCD for ELV or separated supply. Exception for ranges remains. New note clarifies that the rule only applies to complete new subcircuits, not to additions or alterations Non Residential installations New Zealand (used to be other installations) In New Zealand, the following requirements apply to nonresidential locations: (a) Education and childcare facilities (b) Junior education and childcare facilities SECTION TWO (c) Other Locations (d) Particular types of equipment (a) Education and childcare facilities Additional protection by an RCD with a maximum rated residual current of 30 ma shall be provided for final subcircuits supplying one or more socket-outlets having a rating not exceeding 30 A in (i) kindergartens; (ii) day care centers for preschool children; (iii) schools for children up to and including school Year 13; and (iv) areas in tertiary education or vocational training facilities that are primarily used or intended for teaching or training. 16.

17 (b) Junior education and childcare facilities Additional protection by an RCD with a maximum rated residual current of 10 ma shall be provided for socket-outlets in areas within a building primarily for the purpose of teaching or caring for children in (i) kindergartens; (ii) day care centers for preschool children; and (iii) schools for children up to and including school year eight. New text Deleted text Comment Reference Note: these RCDs need not be Type I as used for electrical medical devices (c) Other Locations Socket-outlets with a rating not exceeding 30 A, and supplies to directly connected hand-held equipment, installed in the following locations, shall be protected by RCDs with a maximum rated residual current of 30 ma: (i) Outdoor locations. (ii) Locations that have easy or unsupervised public access. Note: Typical examples include public areas of train stations, airports and shopping malls (iii) Amusement arcades. (iv) Sockets in damp situation zones (d) Particular types of equipment Socket-outlets for and supplies to the following types of equipment shall be protected by RCDs with a maximum rated residual current of 30 ma: (i) Children s rides. (ii) Vending machines. Exception 1: The requirements of Items (a), (b), (c) and (d) need not apply to the following: Where other methods of fault protection other than automatic disconnection of supply are applied, e.g. a separated supply in accordance with Clause 7.4, or supply at extra low voltage in accordance with Clause 7.5. Where the disconnection of a circuit by an RCD could cause a danger greater than earth leakage current. Where socket outlets that are part of a mining operation are supplied at reduced low voltage. SECTION TWO Exception 2: The requirement of Item (b) for additional protection by 10 ma RCDs need not apply to the following: Socket-outlets mounted above 1.8 m from the floor or above 1.8 m from a platform that is accessible to children. Socket-outlets specifically for the supply of electricity to information technology equipment or cleaning equipment that are clearly marked to indicate the restricted purpose of the socket outlet and that 10 ma RCD protection is not provided. 17.

18 Socket-outlets in corridors, halls, gymnasiums and similar areas where portable electrical appliances are not likely to be used by children. Areas occasionally used by children up to school year eight but primarily intended for the care or education of older age groups. A socket-outlet or a connecting device specifically for the connection of a fixed or stationary electric cooking appliance, such as a range, oven or hotplate unit provided that; the socket-outlet is located in a position that is not likely to be accessed for general purposes; the socket-outlet is clearly marked to indicate the restricted purpose of the socket-outlet; and the socket is supplied by a dedicated circuit protected by a 30 ma RCD. Repeats the exception for residential. Notes: Childcare facilities include any premises registered with local authorities as a day-care centre and or registered or licensed family day-care premises. Where one clause requires 30 ma RCD protection of the final subcircuit, and this Clause requires 10 ma RCD protection of the socket-outlet; a RCD at the switchboard and a 10 ma RCD in the same room as, or incorporated into, the socket-outlet(s) would satisfy both these requirements. Care should be taken to avoid nuisance tripping by limiting the number of socket-outlets protected by the same 10 ma RCD. SECTION TWO Reduced low voltage means either (a) a single-phase system in which he nominal line-to-line voltage does not exceed 110 volts a.c.; and the nominal line-to-earth voltage does not exceed 55 volts a.c.; and all exposed conductive parts are connected to the protective earthing conductor; Or (b) a three-phase system in which the nominal line-to-line voltage does not exceed 110 volts a.c.; and the nominal line-to-earth voltage does not exceed 63.5 volts a.c.; and all exposed conductive parts are connected to the protective earthing conductor.. 18.

19 New text Deleted text Comment Home care installations New Zealand The installation of medical electrical equipment in home care medical installations shall comply with AS/NZS No longer just Home dialysis ; includes other kinds of treatment. No special rules set by 3000, so always keeps in step. Electrical medical device is defined in ESRs ; & ESR 60 requires ANY location intended for use with EMDs to comply with Notes: Some of these installations require a Type I RCD, with a maximum rated residual current of 10 ma and faster tripping time. Reference Further information on reliability of supply is provided in Appendix M has been revised. Current edition (not yet cited) covers home care. Latest edition, when cited, will also cover use of portable RCD for travellers Additions and Alterations New Zealand The following shall apply: (a) - Where all of the circuit protection on a switchboard is replaced, additional protection by RCDs as required by this clause (Clause 2.6.3) shall be provided for the final subcircuits supplied from that switchboard. (b) Socket-outlets - Socket-outlets added to an existing circuit shall be protected by an RCD in accordance with the requirements for new subcircuits in the part of the installation in which the sockets are located. Where socket-outlets are added to an existing final subcircuit and RCD protection of the subcircuit is required, installing the RCD at the origin of the subcircuit is preferred, however the RCD protection need only be fitted at the commencement of the additional wiring. The location of all such RCDs should be recorded at the switchboard from which the final subcircuit originates. Exception for replacing existing sockets remains. Exception for lighting points added removed - not needed. Exception for where a new subcircuit wouldn t need an RCD remains. SECTION TWO 2.9 Protection against arc faults Protective devices such as arc fault detection devices (AFDDs) may be used to protect against the effects of arc faults for final subcircuits, especially a) in premises with sleeping accommodation; b) in locations with risks of fire due to the nature of processed or stored materials, (e.g. barns, wood-working shops, stores of combustible materials); c) in locations with combustible construction materials, e.g. wooden buildings; and d) in fire propagating structures. (See Appendix O for more details). 19.

20 AFDDs monitor & react to disturbances in the waveform caused by arcing faultsswitch active(s) & neutral Have a test button May incorporate an RCD function (eg 300 ma) Can have other functions e.g. combi AFDD + overcurrent Where AFDDs are installed, the provisions of Clauses to shall apply. NOTE: The use of AFDDs does not obviate the need to apply any other measures required by other clauses in this standard Type AFDDs shall comply with IEC Rating AFDDs shall have a load current rating no less than that of the associated circuit protective device Arrangement AFDDs shall be located at the switchboard from which the final subcircuit being protected originates Alterations The installation of AFDDs should be considered when carrying out alterations to final subcircuits in situations where existing wiring systems may significantly deteriorate. SECTION TWO Notes: Further guidance on AFDDs is provided in Appendix O. AFDDs may be used to supplement protection of aged wiring. Deterioration of circuits may include damage by vermin Final subcircuits in New Zealand In New Zealand, all final subcircuits having a rating not exceeding 20 A supplying the following shall be protected by an AFDD: Note: When considering possible deterioration of circuits, circuits passing through an area should be considered as well as those supplying equipment within the area. 20.

21 Mandatory AFDD for: a) Points in locations with the risk of fire due to the nature of processed or stored materials, e.g. barns, woodworking shops and stores of combustible materials. b) Points in locations containing irreplaceable items. c) Points in historic buildings constructed largely of flammable materials. d) Final subcircuits supplying socket-outlets in school dormitories. New text Deleted text Comment Reference 2.10 Switchboards A switchboard or switchboards shall be provided in an electrical installation for the mounting or the enclosure of switchgear and protective devices. New exception for teeing-off eg submains to a switchboard; using smaller cable for the branch but without having to place the overcurrent protection within a switchboard: If protection not fitted at tee-off: Fault protection in place for the smaller conductors Length not exceed 3 m If protection fitted at Tee-off: Fault protection in place for the smaller conductors Max 2 protective devices per phase, else deemed to be a switchboard Accessibility and emergency exit facilities Sufficient access and exit facilities shall be achieved by the provision of the following: (i) 1.0 m minimum from all faces of a closed switchboard that need to be accessible (ii) Unimpeded space of at least 0.6 m around switchboards with switchgear doors in any position and with switchgear in a fully racked-out position. (iii) A minimum of two emergency exit paths, spaced well apart, where a switchboard (a) is rated as a circuit with a nominal capacity of not less than 800 A per phase; or (b) is more than three metres in length. Exception: Where a clear space of at least 3 m is provided between the emergency exit path and the switchboard and its equipment, including switchboard doors, in all normal positions of operating, opening and withdrawal, only one emergency exit path need be provided. SECTION TWO 21.

22 (iv) Openings or doorways that are at least 0.9 m wide by 2.2 m high to allow persons necessary access to the switchboard room or enclosure. Currently: 0.75 m wide 1.98 m high. All Figs revised to illustrate the new required dimensions. Note: There is NO Exception for domestic, so if you haven t got 1.0 m from closed face, and 0.6 m from open door, the switchboard can t go there Restricted locations (k) Hazardous areas New Fig 2.24 copy of Fig 4.10 (gas bottle cone Zone ) New Note, pointing to Fig 4.11 (reticulated gas regulator zone ) Suitability Switchboards shall be suitable to withstand the mechanical, electrical and thermal stresses that are likely to occur in service, and the environment in which it is to be installed. Switchboards complying with the relevant requirements of the AS/NZS 3439 or AS/NZS series of Standards are considered to meet the requirements of this Clause. Appendix K provides recommendations and requirements on the relevant design verification and validity tests applicable to switchboards complying with AS/NZS series Location of fuses and circuit-breakers Fuses and circuit breakers shall be located in the following ways: a) Grouping: Fuses and circuit breakers shall be grouped in such a manner as to indicate their relationship to each other, e.g. equipment sump pump motor. b) On the back of switchboards or behind switchboard escutcheons Fuses or circuit breakers shall not be fixed on the back of, or behind, a switchboard panel, frame or escutcheon. SECTION TWO Exception 1: Fuses used for the following purposes may be fixed on the back of or behind, a switchboard panel, frame or escutcheon: Used solely as a fault-current limiter; or. Used to protect instruments or control equipment on the switchboard. Exception 2: Circuit breakers may be fixed on the back of, or behind, a switchboard panel frame or escutcheon provided that they may be operated from the front of the switchboard panel frame or escutcheon; or if used solely as a fault-current limiter; or if used to protect instruments or control equipment on the switchboard. 22.

23 Neutral Bar or Link New paragraph added: Where a cable is used as the neutral conductor, and is looped between devices on the line side, the connection to each device shall be such that continuity remains when the device is removed. Twisting of conductors is not adequate. New text Deleted text Comment Reference SECTION THREE SELECTION & INSTALLATION OF WIRING SYSTEMS 3.3 External influences Thermal insulation Where cables pass through bulk thermal insulation, they shall be rated for currentcarrying capacity, in accordance with the AS/NZS series, as follows: Length of cable passing through insulation: (a) <=150 mm use in air touching a surface rating; (b) >150 mm to 400 mm use partially surrounded rating; (c) >400 mm use completely surrounded rating. Note: In New Zealand, attention is drawn to the requirements of NZECP 55 for wiring and fittings located near conductive thermal insulation. ECP 55 (Foil) is not yet cited by ESRs, but should be followed Paragraph 3 Conductors with green, yellow or green/yellow combination coloured insulation or sheathing shall not be used as active or neutral conductors in installation wiring. Exception: In New Zealand, there is no restriction on sheathing colour. SECTION THREE 23.

24 Sleeving of existing earthing and bonding conductors In electrical installations where earthing or bonding conductors have been previously installed using bare or green conductors, complying with previous editions of this standard, then those earthing or bonding conductors can still remain for their intended use. When alterations, additions or repairs are carried out, that result in new terminations or junctions to those existing bare or green conductors, then all the bare or green coloured conductors shall be sleeved with green/yellow sleeving within each of those new cable junctions or terminations Sleeving of existing live conductors In electrical installations where conductors with yellow insulation have been previously installed as live conductors, complying with previous editions of this Standard, such conductors with yellow insulation can still remain for their intended use. When alterations, additions or repairs are carried out that result in new terminations or junctions to those existing live conductors with yellow insulation, such live conductors with yellow insulation shall be sleeved with white sleeving within each of those new cable junctions or terminations Wiring systems likely to be disturbed Split into two subclauses Locations No change Wiring systems that are likely to be disturbed. SECTION THREE Support & protection Wiring systems installed in positions where they are likely to be disturbed shall be (i) supported at suitable intervals to prevent the undue sagging of cables; (ii) supported to prevent accidental withdrawal of cables from electrical equipment exposing single-insulated conductors ; and (iii) protected from impact as specified in Clause RCDs shall not be used in lieu of mechanical protection for this clause Wiring systems near building surfaces Wiring within 50 mm of surface must be either protected; or free to move to > 50 mm; even if within 150 mm of wall / wall or wall / ceiling corners (same as anywhere else - current free zone along top of wall & down corners removed.) 24.

25 Old Fig explaining the 150 mm corner zone deleted. New text Deleted text Comment Reference Protection now req d even within 150 mm of ceiling Protection now req d even within 150 mm of corner SECTION THREE 25.

26 Wiring systems near building surfaces If equipment holds cables within 50 mm of surface. Protection may be required both in front and / or at rear of equipment - eg switchboards, esp. entry points. Plastic switchboard may need metallic panel behind to prevent screws penetrating rear & damaging conductors Common enclosure/cable. Conductors for the following applications shall not be installed within the same pipe, tube, conduit or the same multi-core cable: (a) conductors that form part of different electrical installations; (b) conductors that form part of individual occupancies of single or multiple electrical installations. Exception for cable tray / duct with removable / no cover / lid Underground wiring Minimum depth of cover Where cables are buried close to a sloping or vertical surface, these dimensions shall also apply perpendicular to that surface. Figs updated to include references to tables & clauses. SECTION THREE 26.

27 SECTION FOUR New text Deleted text Comment Reference SELECTION & INSTALLATION OF APPLIANCE & ACCESSORIES External influences New Notes: NOTE 2: Purpose made anti-condensation and water drains that maintain the IP rating of the enclosure may be used. NOTE 3: Drilling a drain hole in the bottom of the enclosure alone destroys the IP rating of the enclosure. New rule for soffits & other overhangs Electrical accessories not having any specific degree of protection marked on the product is considered as being protected from the weather when installed within the space contained by the soffit (the edge of the eave, veranda or similar overhang) and a plane from the outer edge of the soffit, at an angle of 30 degrees, continuing to the exterior wall. Electrical accessories installed outside that area shall have a minimum degree of protection of IP33. Refer to Figures 4.1 and 4.2. Exceptions: Meter box enclosures within the area need not comply but shall still be required to have a minimum degree of protection of IP2X and shall still be required to be a minimum of IP23 outside that area; or greater if required by the local service rules. Electrical accessories, not having a specific degree of protection marked, which are contained within meter box enclosures need not comply. Fig 4.1 Side view of overhang e.g. eave / deck Above 30 deg line; accessories deemed protected.. No IP Rating Below 30 deg line; P 33 minimum required SECTION FOUR 27.

28 Fig 4.2 Front-on view of eave / deck Above 30 deg line; accessories deemed protected Below 30 deg line; IP 33 Overhang must be continuous; for slatted deck, each slat creates a separate (tiny) protected zone. SECTION FOUR Installation wiring connected via an installation couplers New clause for Soft wiring Cords or cables connected by means of an installation coupler shall be a) of heavy-duty sheathed type complying with AS/NZS 3191 and the requirements of Clause or AS/NZS 5000 ; b) selected to suit the protection device; Exception: For sections of installation wiring that terminate within a single piece of electrical equipment, such as a luminaire, single socket-outlet or SELV socket-outlet, the cable may be reduced to suit the rating of that single piece of electrical equipment. 28.

29 c)adequately protected and installed to minimize the risk of mechanical damage in accordance with Clause ; d)supported and fixed in position in accordance with Clause and Clause ; and e) as short as practicable Arrangement Refers to the use of Heavy Duty sheathed flexible cords or cables to AS/NZS 3191 and AS/NZS Exception: For sections of installation wiring that terminate with a single piece of electrical equipment, luminaire or socket-outlet, the cable may be reduced to suit the rating of that single piece of electrical equipment. New text Deleted text Comment Reference Socket-outlets for these systems Socket-outlets supplied by these systems shall meet the following requirements: (a) The socket-outlet shall be suitable for the intended application and comply with Clause 4.4. (b) The socket-outlet shall be secured in position and installed in accordance with Clauses and (c) When installed on a horizontal surface, socket-outlets shall be designed or arranged to prevent the accumulation of dust or water in accordance with clause (d) Where installed in a location that is not readily accessible, the socket-outlet shall be securely fixed to a structure or support to ensure that no mechanical strain is placed on the installation wiring connections when inserting or removing a plug from the socket-outlet Equipment Wiring New paragraph (e) Installation wiring connected within a luminaire or passing through a luminaire shall be so selected and erected that they will not suffer damage or deterioration due to heat or UV radiation generated by the luminaire or its lamps. SECTION FOUR 29.

30 4.4 Socket-outlets Socket-outlets Alternative pin configurations Socket-outlets with alternative pin configurations e.g. UK, French, German and USA types, shall be used only under the following conditions: (a) The socket-outlet shall have a single set of apertures with an earthing contact and comply with the national standard of the country, as shown in IEC/TR Socket outlets with a single set of pin apertures that accept multiple alternative pin configurations shall not be used. Exception: Shaver socket outlets complying with AS/NZS (b) The installation of the socket-outlet shall comply with Clause (c) The socket-outlet shall be rated at the voltage of the electrical installation, unless supplied at a lower voltage, in which case it may be rated at that lower voltage. (d) Socket-outlets with alternative pin configurations normally supplying a voltage less than that of the electrical installation shall be supplied at that lower voltage. (e) The socket-outlet shall have been tested to the equivalent of the requirements of the Standards listed in Clause (a), (b), (c) and (d). SECTION FOUR In New Zealand only, the following additional provisions apply: (f) socket outlets with alternative pin aperture configurations shall be used only in:- (i) facilities directly associated with an international airport; or (ii) residential areas of non-domestic electrical installations providing accommodation for international visitors or guests. (g) Socket-outlets with alternative pin configurations detailed in IEC TR as requiring a nominal voltage of 230 volts supply, shall be protected by a RCD with a maximum rated residual current of 10 ma and by an AFDD. Notes: These RCDs need not be Type 1 as used for electrical medical devices. Requirements for installation of AFDDs are in Clause 2.9, and further guidance is in Appendix O (h) Socket-outlets with alternative pin configurations detailed in IEC TR as requiring a nominal voltage of 110 volts supply shall be supplied at Reduced low voltage. Note: Reduced low voltage is defined in Clause ALL sockets are DMRAs (requiring SDoC; ESR 83) and DHRAs (Requiring Approval; ESR 84). Approved foreign type sockets can be installed in hotels & airports but multi-fit sockets are banned, apart from the exception for shaver units. 30.

31 Low voltage fixed socket outlet A low voltage fixed switch or socket-outlet, or its faceplate, shall not incorporate a connecting device for telecommunications, data, television, radio or other similar wiring systems. NOTE: USB charging socket-outlets on the faceplate are acceptable as the are fed from the LV system. Aerial and communications systems are all ELV systems, providing a dangerous situation if the are inadvertently livened Socket-outlets for electric vehicle charging Information for the installation and location of socket-outlets for electric vehicle charging stations is provided in Appendix P New text Deleted text Comment Reference Electric vehicle charging socket outlets for NZ In New Zealand only, requirements for the installation and location of socket-outlets for electric vehicle charging stations are provided in Clause Lampholders, including lampholders incorporated in a luminaire Location All lampholders shall be located to be adequately protected against damage that might reasonably be expected. In order to protect against inadvertent contact with live parts, low voltage lampholders shall be located to minimize the risk of (a) direct contact with live parts of a lampholder when the lamp is removed; and (b) mechanical damage to the lamp or lampholder. In a luminaire deleted from deemed-to-comply list. Cordgrip pendants & batten holders always had to be above arm s reach. The OK in a luminaire concept was intended for luminaires with a cover over the lamp. It stopped working when a set of batten holders was mounted on a bar, and thus met the definition of luminaire ;despite having accessible live parts. No more Hollywood lighting bars with bare lamps Recessed luminaires Warning sign Where recessed luminaires are installed in an accessible roof space, a permanent and legible warning sign shall be installed in the roof space adjacent to the access point, in a position that is visible to a person entering the space. The sign shall contain the words shown in Figure 4.11 with a minimum size of lettering of 10 mm. Exception: Where all recessed luminaires installed in an accessible roof space are of either IC or IC-4 classification the warning sign is not required. SECTION FOUR 31.

32 Installation The installation rules have been completely re-written but not much real change (for NZ). New rules for recessed lighting (i) Suitably designed and certified recessed luminaires have installation classifications and shall be marked accordingly. The manufacturer s instructions shall provide all details in regard to restrictions for installation in certain applications. (ii) Unmarked light fittings shall be treated as Do Not Cover. For these typical fittings, the installation method shall be to provide barriers [compliance method (ii)] or clearances [compliance method (iii)] during installation, so as to prevent contact with materials that may impede air flow (e.g. thermal insulation) or that may be affected by the high tempture (e.g. combustible building elements and insulation). (iii) Where building insulation is already fitted and recessed luminaires are retrofitted, added or altered, precautions shall be taken by the luminaire installer not to compromise the safety of the installation. Current NZ default clearances remain; now used in AUS also. SECTION FOUR 32.

33 Classifications of recessed luminaires New system; based on the system NZ has been using for last few years. System defined in AS/NZS , Appendix ZZ but 3000 includes enough info so you ll know what to do. All the labels, and some of the classifications, have changed. Old style labels can be used until Feb Once new edition is cited, can only use old stock for repair or replacement. New installation must use fittings with new classifications & labelling. Cannot be abutted against or covered by normally flammable materials or used in installations where building insulation or debris are, or may be, present in normal use. NOT allowed for residential installations. NON IC New text Deleted text Comment Reference Can be used where normally flammable materials, including building insulation, are, or may be, present, but cannot be abutted against any material and cannot be covered in normal use. Shall NOT be installed in residential installations. Can be abutted against normally flammable materials, including building insulation, but cannot be covered in normal use. Building elements, building insulation or debris have limited access to the heated parts of the luminaire. DO NOT COVER CA 90 (New Zealand only) can be abutted against normally flammable materials, including building insulation. Building elements, building insulation or debris have some access to the heated parts of the luminaire. Can be abutted against normally flammable materials, i ncluding building insulation, and can be covered in normal building elements, building insulation or debris have limited access to the heated parts of the luminaire. CA 135 IC SECTION FOUR 33.

34 Can be abutted against normally flammable materials, including building insulation, and can be covered in normal use. Building elements, building insulation or debris have restricted access to the heated parts of the luminaire. This classification of recessed luminaire is effectively a sealed unit that has a restricted flow of air between the habitable room the luminaire emits light into, and the void/space where the main body of the luminaire is located. IC Requirements for specific classifications Non-IC lminaires shall not be installed in residential buildingsinstallations. In New Zealand only, Do not cover luminaires shall not be installed in residential installations. Only recessed luminaires of classifications Do Not Cover, CA90, CA135 (NZ only), IC or IC-4, which are compliant with AS/NZS , Appendix ZZ, shall be installed in residential buildings. Table 4.3 provides information and guidance on the classifications, symbols, applications and general restrictions on recessed luminaires Clearance from open cooking surfaces Socket-outlets and switches shall not be installed in the prohibited location shown in Figure 4.17, on any wall, cupboard or other surface within 150mm of the edge of an open gas or electric cooking surface, in the area extending from the top of the cooking surface to a range hood, cupboard or ceiling located directly above the cooking surface, or 2.5m above the floor that is directly below the cooking surface, whichever is the lower. SECTION FOUR Accessories Prohibited near gas or electric hob - within 150 mm horizontal from hob edge - from hob surface to obstruction above - if no obstruction, to 2.5 m above floor 34.

35 Water heater isolating switch New (b): Installed adjacent to but not on the water heater. Can no longer use the mcb at swbd as means of isolation. PCUs & similar are NOT isolating switches Where a water heater is supplied by two or more final subcircuits, all of the final subcircuits for that water heater shall be capable of being isolated by a single isolating switch e.g. controlled & uncontrol circuits: same switch Heating Cables In New Zealand only, in-floor and ceiling heating cables shall be installed in accordance with NZS New text Deleted text Comment Reference 4.12 Electricity converters Includes inverters, UPS & VFDs RCDs The possible waveform of a fault current to earth can affect the operation of RCDs and shall be taken into account for the selection of the type of RCD. Where an electricity converter includes an inverter, the RCD shall be of a type suitable for the waveform of the particular inverter, and in accordance with the inverter manufacturer s recommendations Gas appliances & Equipment Hot particles and surfaces Refer to clause 7.7 and AS/NZS for exclusion zones in hazardous areas clause prohibits anything within 3.5 m above a zone that may cause hot particles to drop into a hazardous area zone Electrical equipment and gas supply NZ only In New Zealand domestic installations only, only electrical equipment that is directly associated with the gas supply may be installed in the exclusion zone shown in Figure Not really a new rule, because ESRs citation changed the current rule to this. SECTION FOUR 35.

36 But now apply new 3.5 m above rule: No unenclosed lamps, etc for 3.5 m above zone. Also: Remember the Cone Zone also applies to small bottles e.g. on caravans - just shorter Gas relief vent terminal Electrical equipment that is a source of ignition, such as socket-outlets, switches, luminaires, switchboards, meter boxes and airconditioners, shall not be installed within the hazardous areas shown in figure 4.19 for gas relief vent terminals. SECTION FOUR 4.19 Air Conditioning & Heat Pump systems New rule: For airconditioning systems where the internal head unit (s) are supplied from a circuit separate to that of the compressor, a warning sign shall be permanently fixed on or adjacent to the compressor isolator indicating that the isolator does not isolate the ancillary equipment. Where the head unit is not connected by plug and socket an independent isolating switch in accordance with Clause shall also be installed adjacent to each separately supplied head unit. Heat pump switches that are not isolating. Switches are installed routinely e.g. PDL s WP series. The symbol indicated in must be on the approved isolators. New exception added: Unitary window or through-wall air conditioners, nor to heat pump hot water services, that are supplied supplied by plug and socket adjacent to unit. 36.

37 4.20 Lifts A clause is now included to for lifts that are not safety services. New text Deleted text Comment Reference These requirements are intended to ensure that electricity supply is not inadvertently disconnected from electrical equipment that is required to operate during emergency conditions. ALL lifts must comply with this new clause and lifts that are safety services must also comply with clause 7.2. Lifts are increasingly required to remain operational during emergencies, including fires, especially in very tall buildings. Fire service may need to use a lift to get equipment to the fire or to evacuate disabled people. Neither NZ Building Code, nor standards for lifts cited by it have caught up with this concept. Confirmation may need to be sought before installing a lift The electrical installation of lifts shall be installed in accordance with the appropriate requirements of this Standard. These lifts include but are not limited to: (a) Electric lifts (b) Electrohydraulic lifts (c) Goods Lifts (d) Motor Room-less Lifts (MRLs) (e) Passenger lifts Lifts shall be installed in accordance with the New Zealand Building Code. Lifts that are installed as emergency lifts, shall comply with the additional requirements for Safety Services in clause 7.2. NOTE: Regulatory authorities may have additional requirements. Regardless of whether they are emergency lifts, ALL lifts are specified systems under NZ s Building Act, and must be inspected and maintained under the BWOF system. Unlike normal wiring work, specified systems require building consent for installation or alteration of wiring Lift supply arrangement Lifts shall be supplied by a dedicated circuit. SECTION FOUR Labelling Lift circuits shall be clearly identified by contrasting colouring or other suitable means, in accordance with Clause WARNING: LIFT CIRCUIT- DO NOT SWITCH OFF. 37.

38 Motor room-less lifts (MRLs) Lifts classified as motor room-less lifts (MRLs) are lifts that due to their design have no need for a traditional lift motor room. MRLs that are installed as emergency lifts shall comply with the additional requirements for safety services in Clause MRL Switchboards An MRL switchboard shall not be located in the lift shaft.. A switchboard located remote from the main switchboard and dedicated to supplying individual MRL switchboards shall be readily accessible Switchgear The protective and control device(s) of an MRL shall be located in a readily accessible position. SECTION FIVE SECTION FIVE EARTHING ARRANGEMENTS & EARTHING CONDUCTORS MEN earthing system Minor changes to description of system - Clarifying how MEN fits into the IEC family of earthing systems - Recognising that the distribution Neutral is actually a PEN conductor Protective Earth Neutral. Getting closer to abandoning the longstanding AS / NZS MEN terminology, and adopting IEC terminology. Basically what we know as MEN is just one among several particular variants of TN-C-S Terra Neutral - Common - Separate Terra Neutral means the neutral is earthed In the distribution system, the neutral and earth functions are common. Within the installation, each has its own separate conductor. 38.

39 New text Deleted text Comment NZ electrical workers need to get their heads around this stuff, because it s proposed to introduce TT(Terra Terra) as an alternative earthing configuration for some installations. The distribution remains TN-C (MEN) but the installation s earthing is NOT connected to neutral. Introducing TT for NZ is still only in the planning stages. No MEN link in a TT system. Therefore, no fault protection by passing a high fault current. Primary means of fault protection would be a 300 ma RCD. Knowledge needs to increase to get MEN right, having two systems in use will require more attention to the requirements of each. The requirement in this Section is that every installation must have an MEN switchboard means that TT installations can only be installed as Part 1 with a certified design. Fig 5.1 Normal MEN earthing of installation. Fig 5.2 Alternative arrangement. Both Figs amended to clarify various points - No real change MEN Connection New rule: The MEN or NE connection shall be located in an accessible position for disconnection and testing purposes. Table 5.2 Acceptable types of earth electrodes New type now allowed: Vertical: S/S (inc. s/s clad) 12 mm diameter. Specification change: Horizontal: 20 mm dia galv steel pipe now must have min 3 mm wall thickness. Reference Location of earth electrode The location of the earth electrode shall be identified at the main switchboard. This change not new happened in 2007 edition; so mandatory since 2010 but when inspected many seem to have forgotten to provide the label at MSB Structural metalwork including conductive building materials Structural metalwork forming the frame of a structure containing an electrical installation or part thereof, including sheds or similar structures that are permanently connected to the electrical installation wiring, shall be earthed. NO excuses / Exceptions; (there are some in current edition). So now ALL structural metalwork must be earthed. SECTION FIVE 39.

40 The size of the earthing conductor used for earthing the frames shall be determined from Clause in relation to the crosssectional area of the largest active conductor that is contained within the framework of that electrical installation. Do not confuse with bonding, this is earthing! i.e. intended to carry fault current. Often the largest active conductor will be the mains / submains. For combined outbuildings, each outbuilding shall contain its own individual bonding connection to the conductive frames within that outbuilding. All other conductive building materials shall be earthed where (a) the risk of contact with live parts of electrical equipment or insulated, unsheathed cables exists; or (b) double insulation of cables in contact with conductive building materials is not permanently and effectively maintained This is the current clause; changed to now apply only to non- structural metalwork e.g. metal cladding, foil insulation, nail plates, metal flush boxes, etc. The breaking of a conductor at a termination shall not result in contact between unearthed conductive building material and (i) live parts; or (ii) parts separated from live parts by single insulation. Not new... But seems to be often ignored e.g. metal flush boxes / mounting plates open-back mounting blocks on foam-sandwich panels. SECTION FIVE Outbuildings Split into two parts: Individual outbuildings & Combined outbuildings Individual outbuildings No change. The earthing system in an individual outbuilding shall be either (i) connected to a protective earthing conductor connected in accordance with Clause ; or (ii) connected as a separate MEN installation in accordance with clause Combined outbuildings; The earthing system in a combined outbuilding shall be connected to a protective earthing conductor, connected in accordance with Clause , and shall not be connected as a separate MEN installation Outbuilding Individual A structure containing a switchboard that is separated by an area of land from the structure containing the switchboard that supplies it. Same as the current definition of outbuilding. 40.

41 Outbuilding Combined New concept Any number of structures installed or built on the same foundation, or sharing conductive metal roofing or conductive metal frames, with more than one electrical supply, and separated by an area of land from another structure that contains the switchboard from which those electrical supplies are obtained. New text Deleted text Comment Reference SECTION FIVE 41.

42 Unprotected consumer mains i.e. mains with no short circuit protection ESR 32 requires network to provide short circuit protection for mains ; so may seem not to apply in NZ BUT where the network s supply fuse is located within the meterbox / switchboard, mains starts at the supply fuse If the incoming conductors are not mains, the network may not have protection in place. If no short circuit protection, the metal of the enclosure may need to be earthed with a PEC of equal CCC to the incoming neutral. New note: Short-circuit of an unprotected active conductor to a switchboard surround, riser bracket, etc. will cause the earthing conductor to continuously carry the maximum fault current available through those consumer mains. Reduced sizes for protective earthing conductors in other situations are permitted because the fault current is of limited duration. Exception: Where double insulation of the consumer mains conductors is maintained up to the supply terminal/s of the service protective device/s, and short-circuit protection is provided by that device, this requirement need not apply. SECTION FIVE 42.

43 (bonding of) Showers and bathrooms For combined outbuildings, where each outbuilding contains such showers or bathrooms: (a) each outbuilding shall contain its own individual bonding connection to the conductive reinforcing within that outbuilding; or (b) providing that the reinforcement is electrically continuous across the whole of the combined outbuildings (refer to Note 3), one bonding conductor connecting the reinforcement to the earth bar or link of the switchboard that supplies all of the combined outbuildings is satisfactory. NOT from one of the outbuilding switchboards Swimming and spa pools The order of the clauses has changed to improve clarity New text Deleted text Comment Reference Bonding arrangement Conductive Pool Structure Equipotential bonding conductor connection point Electrical Equipment (was ) Conductive Fixture and Fittings Also some changes within the clauses. The aim is to eliminate, as far as is possible, differences in potential due to the increase in a persons conductivity when in water Conductive pool structures Not only have to provide an accessible bonding connection point (in case something later triggers the need to bond) Now also: The connection point shall also be bonded to the earthing conductors associated with each circuit supplying the pool or spa, or the earthing bar at the switchboard at which the circuits originate. Where the pool structure is conductive, the connection point shall be installed and bonded to the installation earthing system regardless of other requirements specified in Clauses and Exception: This requirement need not apply where the reinforcing metal of the pool shell or deck is electrically continuous (0.5 ohm) to the reinforcing metal within the concrete floor of the electrical installation, and that reinforcing metal has been bonded to the earthing system of the electrical installation as required in clause SECTION FIVE 43.

44 Conductive fixtures & fittings New Note: The earth itself is a fortuitous path that may not provide a low enough impedance to operate a protective device or be suitable as an electrical bond. Exception 1: Where any fixed conductive material such as pool ladders, diving boads etc. are installed within arm s reach of the pool edge and are electrically continuous (0.5 ohm) to the reinforcing metal of a concrete slab into which they are installed, and where that reinforcing metal is electrically continuous with the reinforcing metal of the pool shell or deck, then no additional bonding is required. Exception 2: This requirement need not apply to fixed conductive parts and fittings that are not part of electrical equipment and have no individual accessible part greater than 100 mm in any dimension. e.g. small mounting brackets supporting non-conductive fence. SECTION FIVE 44.

45 SECTION SIX New text Deleted text Comment Reference DAMP SITUATIONS Scope Para 2 amended: Other fixed water containers are those designed to contain water in normal use and do not include fortuitous containers or areas not intended to contain water for normal operations or water containers into which persons do not normally put a part or all of their body. Clarifies: not toilets (Zone classification) Baths and showers (c) Zone 1 (iii) For a fixed plumbing connection on the ceiling, by the vertical plane horizontally distant from the fixed plumbing connection by either: (A) in Australia, a radius of 0.6 m; or (B) In New Zealand, a radius of 1.2 m. A barrier with a minimum height of 1.8 m may be used to reduce the horizontal extent of the zone. SECTION SIX 45..

46 (Zone classification) Other fixed water containers Amended upper size limit for basins & sinks: Not Exceeding 40 litres (currently 45) So anything over 40l has zones for laundry tub. SECTION SIX 46.

47 Spa pools or tubs Spa pools or tubs with a water capacity not exceeding 680 l shall comply with the requirements of Clause 6.2. Small spas now start at 680 litres (was 500 l); up to 5000 litres. Below 680 l; it s treated as a laundry tub Voltage gradients Current protection option deleted: location of the electrical equipment at a distance from the pool with all plumbing connections being made of non-conductive materials. Only RCD or electrical separation are now acceptable. New text Deleted text Comment Reference Electricity generation systems Electricity generation systems, including engine-driven generator sets, stand-alone power systems, grid-connected inverter systems and battery systems shall not be installed within any classified zone Electricity distributer s electrical equipment Pools and spas shall not be located in areas containing electrical equipment, including connection pits and cabinets, owned by the electricity distributer, that result in such equipment being incorporated into any classified zone. In WA, kids were climbing onto the network s connection box that was in the back yard; and jumping from it into the pool. These new restrictions for pools also apply to other types of damp situation. SECTION SIX 47.

48 SECTION SEVEN SPECIAL ELECTRICAL INSTALLATIONS 7.2 Safety Services This sub-section has been completely re-written, to improve clarity. Each type of safety service has its own set of clauses. Very repetitive and takes more pages but keeps (most of) the info needed for each type together. Clauses that apply to all types of safety service: Scope Supply systems Main switchboard and switchgear Main Switches Clauses that set additional rules for (some) particular types of safety service: Fire pumps & fire pump control equipment Fire / smoke detection equipment & fire alarm systems Air handling systems Evacuation equipment Emergency Lifts SECTION SEVEN Emergency motor room-less lifts Fire-resistance level Fire-resistance level (FRL) means the grading periods in minutes determined in accordance with Specification A2.3 and expressed as three numbers (for example, 120/120/120), for the following criteria E.g. 120 / 120 / 120 (i) Structural adequacy (first number) The ability to maintain stability and adequate load bearing capacity as determined by AS

49 (ii) Structural Integrity ( second number ) The ability to resist the passage of flames and hot gases as specified by AS (iii) Structural Insulation, ( third number ) The ability to maintain a temperature over the whole of the unexposed surface below that specified by AS Alternative supply systems New text Deleted text Comment Reference Continued occupation Where an alternative supply is provided for continued safe occupation (a) Safety Services: the alternative supply system shall have sufficient capacity to operate all safety services. Can t install an alt. supply for only one type of service. (b) Continued occupation of any portion of the building (during loss of normal supply): The alternative supply system shall have sufficient capacity to supply all safety services and Electrical Equipment associated with the continued occupation of the building. Having safety services doesn t mean having to provide an alternative supply but if you install an alternative supply, either - for any safety service; or - for continued occupation (of any part of building) ; Then that supply has to be capable of supplying all the safety services required for continued occupation. A dedicated alternative supply may be provided for electrical equipment other than (a) and (b) (a) = safety services; (b) = continued occupation NOTE: examples may be for security purposes or preservation of business assets and stock e.g. refrigeration having alt. supply for this purpose no does NOT trigger need for that alt supply to provide for any safety services Fire management system Where a fire management system is incorporated, the fire management system controlling the nominated safety services shall be connected to the alternative supply and the alternative supply shall have sufficient capacity to supply all the nominated safety services required to operate in fire mode. Allowance is required for motor start-up by plant sequencing or additional capacity for motor starting. If not all lifts are required to operate as during emergency. (eg 3 lifts out of 7), FMS selects which lifts will operate. SECTION SEVEN 49.

50 7.2.3 Main switchboard & switchgear Arrangement Where a supply isolating device is installed it shall be a load break switch or circuit breaker. Discrimination (selectivity) shall be considered between all protective devices if the supply isolating device is a circuit breaker NOTE: Some jurisdictions may have additional requirements for the isolating device, such as: i) capable of being locked on; ii) labelled for operation by authorised personnel only Main Switches new paragraphs added An auto transfer switch (ATS) may be used as a main switch provided the ATS meets the requirements of Clause ATS being an automatic form of changeover for alternative supplies. Fault-current limiters used to protect safety services shall not be used to provide protection to any part of the general electrical installation. Supply Isolating device A SID is NOT a main switch SECTION SEVEN Safety services main switches main switch submain isolators 50.

51 7.2.5 Fire Pumps & fire pump control equipment New text Deleted text Comment Reference Wiring Systems Switchgear Interposing switches Pump rooms for Fire pump motors Similar pattern for each type of safety system. 7.2.x.4 Interposing switches No switch shall be interposed between a main switch and downstream switchboards supplying [ insert safety system ]. If a safety service is supplied via a DB, the DB can t have an incoming isolator that controls the (separate) incoming safety service submain this requirement is repeated for each type of safety service that has its own sub-clause; but doesn t apply to safety services that don t have their own sub-clause Emergency Lifts In Australia Defined by BCA In NZ: In NZ only, lifts required to operate for firefighting or other emergency purposes are safety services. The signs commonly seen on lifts: in event of fire, do not use lift do NOT mean that the lifts won t keep operating; they mean that the fire service doesn t want the lifts to be filled with ordinary people too lazy to walk down the stairs Interposing switches No switch shall be interposed between a main switch for lifts and downstream lift switchboards. Slightly different wording, and this time with Exceptions Exceptions: This requirement need not apply where an alternative supply system is provided in accordance with Clause ; or to switches located remote from the building for which the safety services are provided, e.g. upstream switches supplying an outbuilding or fire separated portion of a building. SECTION SEVEN 51.

52 7.3 Electricity Generation Systems Has had a few tweaks, to align with latest edition of AS/NZS Generating Sets. Diagrams also aligned - and in colour and show ALL requirements not just the c/o switching. To avoid silly mistakes or worse, anyone installing an engine-driven generator should be following 3010 ; not just relying on the basic overview in this clause. For other types of generation; these fundamental concepts apply, along with other cited standards. SECTION SEVEN Basic protection & fault protection Provision shall be made to ensure that all necessary connections for basic and fault protection in the installation, such as the MEN connection, remain intact when supply is available from the output of the electricity generation system. Normal C-curve mcbs are generally NOT suitable. RCDs need to be selected to suit the (fault current) waveform. New terminology (defined in 1.4.x): Normal supply: The source of supply that the electrical installation is supplied from under normal conditions of operation. Note: the normal supply is usually from a distribution network, but may instead be from a generation system. 52.

53 Alternative supply: A supply system intended to maintain the functioning of an electrical installation or a part or parts thereof, in case of interruption of the normal supply (eg stand-by genset, or batteries + inverter). Supplementary supply: A supply system intended to operate in conjunction with the normal supply. (e.g. PV array via grid-connect inverter, co-generation). New text Deleted text Comment Reference Connection to electrical installation Alternative supplies (a) The incoming neutral to a MEN switchboard shall not be switched from MEN distribution system. Switching the generator N is allowed; and sometimes necessary; but not recommended in most cases. b) The neutral-earth connection (MEN connection) shall be made within the installation at the main switchboard. New NZ Exception: In New Zealand only, where the generating set is connected to a switchboard without a N-E link and when the electrical installation is operating from the alternative supply, a N-E connection and a connection to the mass of earth are required to be made in the distribution switchboard in accordance with AS /NZS This N-E connection and connection to the mass of earth are not required when the electrical installation is operating from a normal supply. SECTION SEVEN 53.

54 7.9 Supplies for Electric Vehicles (NZ Only) Scope The particular requirements of this clause supplement or amend the requirements of sections 2 to 7 of this standard for parts of electrical installations intended for the charging of electric vehicles for New Zealand only. Notes: Appendix P contains information on the modes of charging used for charging systems used for electric vehicles. Appendix C contains guidance on assessing the contribution of electrical vehicle charging to maximum demand of an installation Contribution to Maximum demand: Residential: Table C1 Up to 5 living units: 100% connected load 6-20 units: 90% > 20 units: 75 % Non-residential: Table C2 100% of largest, plus 75 % remainder System of supply The system of supply to any electric vehicle charging system shall be TN-C-S (MEN). The supply shall not be obtained from a switchboard that is supplied by a PEN neutral conductor in the submain using the outbuilding provisions of clause Note: The use of the PEN neutral and earth connections required for the electric vehicle charging system prevents the correct earthing connections from being provided for the electric vehicle charging system earthing failure detection system Residential electrical installations SECTION SEVEN Socket outlets for Mode 1 Use Socket outlets shall not be installed for use for Mode 1 charging. This doesn t prohibit use of Mode 1 charging (eg mobility scooter / golf cart); using a GPO; just prevents the installation of sockets specifically for that purpose Facilities for other than Mode 1 charging (Residential) Facilities for charging electric vehicles in residential installations shall be located adjacent to a carparking area and shall be installed in accordance with either clause or clause Energy Safety originally intended to require an EV charging circuit in every new residential installation. At last minute they backed off, so the clause now doesn t require one, but just covers how to do it. 54.

55 New text Deleted text Comment Facilities for Mode 2 charging (Residential) Each final subcircuit for mode 2 charging shall comply with all of the following:- (a) The final sub circuit cable shall have a minimum current carrying capacity of 20 A and shall not supply any other socket outlet or point in wiring. Note: This minimum current carrying is specified to allow the final subcircuit cable to be converted to supply a Mode 3 charging system if required. Another last-minute back-down by Energy Safety; was 32 A, so now only adding 20 A to max demand of house. (b) The final sub circuit cable shall be protected by a separate residual current device (RCD) of Type B complying with IEC 62432, with a maximum rated residual current of 30 ma, which operates in all live (active and neutral) conductors. Combined RCD and overcurrent circuit-breakers (RCBOs) may be used. (c) The socket outlet shall comply with one of the following standards:- (i) AS/NZS 3112 (ii) IEC (iii) AS/NZS 3123 (iv) BS , not including the un-switched version (d) The socket outlet shall be installed at a minimum height of 800 mm from the floor. Reference Facilities for Mode 3 & 4 charging (Residential) An a.c. mains supply connection facility for Mode 3 electric vehicle charging systems shall comply with all of the following :- (a) The final subcircuit cable shall have a minimum current carrying capacity of 32 A and shall not supply any other socket outlet or point in wiring; (b) The final subcircuit shall be protected by a separate residual current device (RCD) of Type B or Type F complying with IEC 62432, with a maximum rated residual current of 30 ma which operates in all live (active and neutral) conductors. Combined RCD and overcurrent circuit-breakers (RCBOs) may be used. (c) The a.c. mains supply connection facility shall be connected by direct connection in accordance with section (d) An isolating switch complying with clause , with a minimum current rating 32 A, shall be provided for the a.c. mains supply connection facility. (e) The output socket or cable of the a.c. mains supply connection facility shall be installed at a minimum height of 800 mm from the floor. SECTION SEVEN Non- Residential electrical installations All supplies for charging electric vehicles in non-residential installations shall be installed with an RCD of Type B complying with IEC Note Worksafe has published a guide for Electric Vehicle Charging Systems - Not (yet) cited, but should be followed. 55.

56 7.8 Companion Standards New / Updated AS/NZS Generating Sets NZECP Foil Insulation Worksafe NZ Guide for E V Charging Systems 2016 AS/NZS A1 Medical Electrical AS/NZS Hazardous Areas AS/NZS PV Arrays AS/NZS A1 Construction / demolition sites AS/NZS A1 Boats & Marinas AS/NZS A1 AS/NZS A2 Medical Electrical AS/NZS A2 Construction / demolition sites - Coming soon NZS A2 - Coming soon AS/NZS Grid-connect inverters - Coming soon AS/NZS A2 - Coming soon AS/NZS Work under way SECTION EIGHT AS/NZS Work under way AS/NZS 3000 A1 (Almost as big a change as this new edition) - Work under way 56.

57 SECTION EIGHT VERIFICATION New text Deleted text Comment Reference Section restructured so that each type of test follows standard pattern: What Why How Results Parts re-written for clarity, And more explanation; but few actual changes. 8.2 Visual inspection Checklist (vii) Protection against external influences including ingress of moisture where required by any clause. (viii) Suitability for intended voltage, current and frequency. New Note: re suitability of RCDs Deemed suitable for residual a.c. & presidual pulsating d.c. if it is marked with symbols in Clause (b) to (e) Mandatory Tests Now specifies both LV & ELV tests. Pointer to additional tests for separated supplies Extra-low voltage The following tests shall be carried out on parts of electrical installations designed to operate at extra-low voltage: (a) Continuity of the earthing system for PELV circuits in accordance with Clause (b) Insulation resistance in accordance with Clause (c) Polarity for PELV circuits in accordance with Clause (d) Correct circuit connections in accordance with Clause Continuity of earthing system SECTION EIGHT New paragraph 3: Where a PEN submain is installed in accordance with clause (c), the test shall confirm that the earth busbar of the sub-board is connected via the PEN conductor to the earth busbar of the main switchboard. A direct result of a case at a NZ school a few years ago. An electrician installed DB in outbuilding, with electrode but no MEN link. Failed to test. Failed to have the work inspected. Plumber received shock. 57.

58 8.3.6 Insulation resistance More explanation around expected results. If you get anywhere close to 1 Megohm, it may be a pass but there s probably something wrong. 50 m 0f PVC should be > 20 megohm 50 m of XLPE should be > 1500 megohm Polarity Clarification about switches & protective devices in neutrals (b) switches or protective devices do not operate in the earthing or a combined protective earthing and neutral (PEN) conductor; (c) switches or protective devices do not operate independently in neutral conductors Verification of earth fault-loop impedance (EFLI) Re-written for clarity, with further explanation, 4 new Notes, NO change to requirements Low voltage socket-outlet circuits Where an installation includes circuits satisfying a), b) and c) below, an EFLI test, in accordance with Clause , is required for those circuits: (a) Fault protection is by automatic disconnection of supply. (b) Supplying one or more socket-outlets. (c) Where socket-outlets are not protected by a residual current device with a rating of 30 ma or less. SECTION EIGHT Methods (of testing EFLI) If there is a supply available, must use live method. Tests the actual Earth Fault Loop; back to source If no supply available, can use A + E loop resistance method Only tests the subcircuit part of the EFL, relies on asumptions about the distribution, mains, & submains. Must test each branch of circuit to furthest point. Must test each phase of multiphase circuits. 58.

59 Results Table 8.1 ( EFLI ) Use for live method Values to 1 decimal place New text Deleted text Comment Reference Table 8.2 ( Resistance ) 1 decimal place Use R e for PECs Use Rphe for EFLI R p hdeleted New notes: 3 Table B1 gives earth fault loop route lengths for final sub circuits will satisfy the requirements of Clauses , 5.7 and for automatic disconnection of supply for the conditions of B5.2.2 These values comply with Table 8.2 and may be used as an alternative to resistance values. 4 In addition Table B1 also includes final sub circuit route length for voltage drops complying with Clause To comply with both earth fault loop and voltage drop route length the shortest route length is required. SECTION EIGHT 59.