Golf Cart Wiring Gauge Question

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  #1  
Old 03-23-16, 10:13 AM
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Golf Cart Wiring Gauge Question

I am in the process of restoring an older Melex 112. Since Iím fabricating all the cables, I need to know the gauge size. Iím assuming that 8 gauge wire would be sufficient to handle 36V/2HP motor, but I would like to have this confirmed before I buy the wire.
 
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Old 03-23-16, 10:33 AM
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I would use the old wiring as a guide to what size the new wire should be.

#8 sounds a little small to the motor.
 
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Old 03-23-16, 11:11 AM
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I would use nothing less than #6 welding lead but I am rather conservative when it comes to low voltage DC motors.
 
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Old 03-23-16, 04:52 PM
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What amperage will your cart draw? That can be used as a guide for sizing your wire.
 
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Old 03-24-16, 05:35 AM
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I finally managed to halfway read the motor Amp draw:57A. If this reading is correct, #8 is definitely out of the question. Since I already have some on hand, I'm going to use #4 welding wire instead. The 2.1 HP motor is conservatively rated. At that amperage and voltage, it should be over 3 HP.
 
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Old 03-24-16, 06:11 AM
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Don't forget that the loops of wire used for the speed control are basically heaters. Energy gets wasted as heat to get the various speeds.
 
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