A WORD ABOUT PROPER GROUNDING

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Jessica Conley
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3 A Word About Proper Grounding Section 5-3 A WORD ABOUT PROPER GROUNDING Due to the wet environment of irrigation equipment, it is very important that your Pierce CP600 Center Pivot Irrigation System be properly grounded. The NEC (National Electric Code) requires a grounded conductor of a grounded utility system to extend to every piece of equipment served. This means that for a threephase electrical system, three power wires and one ground wire are required between your main service entrance disconnect and the pivot panel. For center pivot equipment, this service entrance should be a fused disconnect switch located before the power cable goes underground to the center pivot machine. An irrigation system may be served from wye, open-delta, or grounded-delta transformers. The grounded-delta three-wire transformer, however, is not recommended because there are only three wires from the transformer to the service entrance. Most newer installations will have three power leads and a ground from the transformer to the main service entrance. If only three leads are provided from the transformer, a grounding lead should be installed from the transformer to the service panel to ensure a low impedance path-to-ground required due to the long lengths of wire used on pivot machines. Consult an electrician qualified to make this installation. In addition to the grounding circuit, two ground rods should be driven at the transformer, service disconnect or pump panel, and at the pivot panel. The ground rods should be connected to the enclosures with a minimum of No. 6 bare copper wire, and in accordance with the National Electric Code. When a generator is used as a power source, it should also be grounded, and grounds rod driven at both generator and pivot. September 2010 CP600 Pivot Assembly Manual

5 Standard Panel Span Cable Connections SPAN CABLE SIDE PANEL SIDE Section 5-5 WATER CONTROL AUX CONTROL CP CP End Gun Pink (P93 = TAN) Common White (P93 = WHITE) CP Forward Brown (P93 = PURPLE) CP Reverse Orange (P93 = YELLOW) CP Safety in Yellow (P93 = BROWN) CP CP Auto Reverse Yel/Red (P93 = PINK) EndTower Purple (P93 = ORANGE) September 2010 Note: Field Wiring-Use Copper or Aluminum conductors for at least 60 C. Recommended screw tightening torque is 4.4 lb-in (0.5 Nm). CP600 Pivot Assembly Manual

6 Section 5-6 Panel Wiring Note: Reference parts list on Section Running Forward 8 Reverse End Tower Safety 9 September 2010 CP600 Pivot Assembly Manual

7 END TOWER END Panel Wiring Section 5-7 Note: The Siemens FWD/REV contactor is rated for a maximum of 15HP at a voltage of 480VAC END GUN PINK COMMON WHITE FORWARD BROWN REVERSE ORANGE SAFETY YELLOW AUTO REVERSE YEL/RED SPAN CABLE BLACK SPAN CABLE BLUE SPAN CABLE RED 3 PHASE INCOMING POWER L1 3 PHASE INCOMING POWER L2 3 PHASE INCOMING POWER L3 17 September 2010 CP600 Pivot Assembly Manual

9 Panel Wiring Parts List Section 5-9 ITEM PART# QTY DESCRIPTION HOUR METER VOLT METER 600V 3-1/2 IN PERCENT TIMER 60 SEC TRANS 500VA 220/ AMP DISCONNECT SWITCH TERM BLOCK M35/16 * INDICATOR LIGHT AMBER 1/ SWITCH BLOCK NO SWITCH BLOCK NC SWITCH RELAY BASE CIRCUIT BREAKER 6AMP SAFETY TIMER DELAY STARTER 18AMP 120VAC STARTER FWD/REV TERM BLOCK M4/ GROUND BAR 10 POS GROUND LUG 2-1/4 SET SCREW * DISCONNECT SWITCH SHAFT * DISCONNECT SWITCH HANDLE * FUSE CARTRIDGE BUSS * TERM BLOCK 2 TERMINAL * TERM BLOCK 3 TERMINAL * TERM BLOCK BARRIER * TERM BLOCK END STOP * SWITCH REL * TWIST SWITCH 3 POS * TWIST SWITCH 3 POS * PUSH BUTTONSWITCH * PUSH BUTTON SWITCH ADPT September 2010 CP600 Pivot Assembly Manual

10 Section 5-10 Standard Panel Schematic September 2010 CP600 Pivot Assembly Manual

11 Standard Panel Schematic Section 5-11 September 2010 CP600 Pivot Assembly Manual

12 Section 5-12 CP JB Intermediate Cam ITEM PART# QTY DESCRIPTION Starter Micro Switch September 2010 CP600 Pivot Assembly Manual

13 Notes Section 5-13 September 2010 CP600 Pivot Assembly Manual

14 Section 5-14 End Tower Junction Box w/out Auto Reverse and Booster ITEM PART# QTY DESCRIPTION Starter Relay Relay Base September 2010 CP600 Pivot Assembly Manual

15 Stall Timer Wiring Section ITEM PART# QTY DESCRIPTION Starter Micro Switch Stall Timer 1 3 September 2010 CP600 Pivot Assembly Manual

16 Section 5-16 Collector Ring Wiring WARNING! MAKE SURE WIRES CLEAR BRUSH POSTS WHEN MACHINE ROTATES In From Control Panel Note: See WARNING! regarding proper ground brush wiring Section Out to Tower No. 1 Collector Ring WARNING! DO NOT CONNECT #6 WIRE TO #9 WIRE. September 2010 CP600 Pivot Assembly Manual

Warning Section 5-17 WARNING! GREEN IS GROUND. MAKE SURE GREEN WIRE IS CON- NECTED TO L11 RACEWAY BRUSH. THE RACEWAY BRUSH IS GROUNDED TO THE COLLECTOR RING BASE.

17 Warning Section 5-17 WARNING! GREEN IS GROUND. MAKE SURE GREEN WIRE IS CON- NECTED TO L11 RACEWAY BRUSH. THE RACEWAY BRUSH IS GROUNDED TO THE COLLECTOR RING BASE. FAILURE TO PROP- ERLY GROUND YOUR PIVOT WILL RESULT IN SERIOUS INJURY OR POSSIBLE DEATH. Note: Wire color in Span Cable is subject to change without notice. Reference will be made here on out to yel/red wire. Depending upon purchase date, your Span Cable may be equipped with tan; yellow/red replaces tan. September 2010 CP600 Pivot Assembly Manual

NEC Codes if more current shall supercede this manual

NEC Codes if more current shall supercede this manual WARNING! Be sure that the machine is properly grounded before applying power to the main control panel -F-3 A Word About Proper Grounding Due to the