Typical Marinette AC Wiring

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Toby Barrett
6 years ago
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1 Shore Power Neutral Ground Galvanic Isolator Neutral Returns Marinette Panel Equipment Grounds OUTLETS PORT WATER HEATER OUTLETS STBD REFRIG STOVE AIR COND Breaker assignments differ from boat to boat Heater Stove Air Conditioner Refrigerator Port Outlets Starboard Outlets Typical Marinette Wiring

2 Shore Power Optional Optional Neutral Ground Note: main breaker optional must be off when optional shore power is not in use to deenergize connector Shore Power Note: Both shore power cables must be plugged into the same phase many marinas provide Amp power of different phases in adjacent Neutral receptacles Note: To allow use of a single hot breaker bus the Ground current is split between the two shore power connections on the neutral (white) side, leaving all circuits hot even if the second shore power is not connected Galvanic Isolator Marinette Panel Neutral Returns Optional Neutral Returns Equipment Grounds OUTLETS PORT OUTLETS STBD WATER HEATER REFRIG STOVE AIR COND Breaker assignments differ from boat to boat Heater Stove NOTE: To bring this circuit up to modern standards, the hot (black) from the two shorepower connections must remain separate. To accomplish this, make the changes shown in dotted RED: => Isolate the breakers for the 2 nd shorepower loads by removing the jumpers to adjacent breakers, shown with RED Xs. => Connect the 2 nd shorepower hot to the newlyisolated breakers => Add new jumpers around the optional shorepower breakers to reconnect the standard shorepower breakers. Air Conditioner Refrigerator Port Outlets Note: water heater and air conditioner are shown connected to optional shore power Starboard Outlets Older Marinette Wiring with Two Shore Power Cables

3 shore power Generator Neutral Ground Transfer Galvanic Isolator Neutral Returns Marinette Panel Equipment Grounds OUTLETS PORT WATER HEATER OUTLETS STBD REFRIG STOVE AIR COND Breaker assignments differ from boat to boat Heater Stove Air Conditioner Refrigerator Port Outlets Starboard Outlets Typical Marinette Wiring with Generator

4 To instruments and sensors DC Equipment Grounds KEY (START) TO 2 ND TERY TERY PARALLEL SOLENOID Start Relay This shows the original Marinette primary wiring. return goes from the starter to a stud on the hull, and then to the battery. Hull To instruments and sensors Hull KEY Start Relay (START) Starting This shows starter wiring for one engine, with the return going directly from the starter ground stud to the battery negative terminal. The engine block is connected to the hull through a second wire. This should be more reliable and deliver more starting current. It requires one less large cable. It is easy to isolate the engine block from the hull for troubleshooting. This circuit is standard on many diesels both com 1 2 com 12both Starting Starting Ground Plate Hull This schematic shows one way of wiring two engines to two start batteries. Either engine can be connected to either battery, or both. There is an issue with the alternators if the switches are moved while the engines are running, and this must be taken care of*. This circuit requires two extra large cables to connect the 1 terminals and the 2 terminals, and a ground plate isolated from the hull that takes return cables from each starter and each battery. *Some battery switches disconnect the field before switching, otherwise a diode can protect the alternator output from voltage spikes. Primary Wiring Options

5 FUEL Accessory Panel Fuel Level Sender PNK Lower Compass 240/33 ohms Stbd Nav Float switch Instrument Panel THOMETER WATER TEMPERATURE OIL PRESSURE VOLTS Alarm Port Nav PUMP WIPERS BLOWER GRY TAN LT BLU PPL Typical Loads Stern DC Equipment Grounds OFF (START) KEY GRY PPL Coil Points TAN LT BLU BPS RED YEL/RED PINK Engine Room Panel REEFER PUMP PUMP 240/33 DC Equipment Grounds Temp Sender Oil Pressure Sender High Temp NC Low Oil Press NC TERY PARALLEL SOLENOID TO 2 ND TERY Start Relay DC return shown in current ABYC usage is YEL Hull Typical Marinette DC Wiring, Single Engine

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