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X-Shark · 07-10-2008, 10:00 AM

Ah' Yes it needs a ground wire to complete the circuit. Auto's use the body /Frame of the vehicle as the ground path/wire. On boats you do not want to use the hull as a ground. 1st electricity will not travel thru fiberglass,so thats out and on a alum boat this is a bad idea due to electrolysis.

So a Ground wire must be run to the Neg battery post.

Now, let me talk about amperage draw. Those KC's draw a LOT of amperage. Depending on the length of run the wire needs to be sized correctly. There is a formula for this it's called OHM's law.

I'm going to stop now as I know I'm way over your head already.

07-10-2008, 10:00 AM	#5
X-Shark Senior Member White Marlin Join Date: Oct 2007 Location: Pensacola, Fl. Posts: 3,026	RE: need help with lights Ah' Yes it needs a ground wire to complete the circuit. Auto's use the body /Frame of the vehicle as the ground path/wire. On boats you do not want to use the hull as a ground. 1st electricity will not travel thru fiberglass,so thats out and on a alum boat this is a bad idea due to electrolysis. So a Ground wire must be run to the Neg battery post. Now, let me talk about amperage draw. Those KC's draw a LOT of amperage. Depending on the length of run the wire needs to be sized correctly. There is a formula for this it's called OHM's law. I'm going to stop now as I know I'm way over your head already.