Quote:
Originally Posted by 93 Krawler
I know what you mean, I have 2/0 for my battery cables.
My factory battery cable was like #2-4, and there was a #6 that ran everything but the starter. I think the charge wire is a #8. If you add all the power wires that come out of the loom on the 5.3, I'd say they are about the size of a #8 max. I don't even see how a 18g wire can handle 10-15 amps. DC is confusing as far as loads.
In a house panel, the breakers add up to more than the the service size. Does the same apply to DC. If you add all the fuses in any car, I bet it adds up to more that the battery cable size. I guess wattage plays in there somewhere. Like high power car amps. they take huge wires.
I'm with you, go big. I'm getting a 150 amp relay, and run a #4 to it. If that's not enough, then I give up.
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i dont think the same thing applies to your vehicle as your house. In your house, you won't ever be running everything in your house at the same time. have every light on, something in every outlet running ac, heat, dryer, stove, washer, fans, etc.... but in vehicle, you certainly can be. it is possible to be driving at night running your lights, wipers, heater/ac, stereo, powering your engine, fans, fuel pump all while winching yourself out. So there is a chance you could see near full load on all systems at once in a vehicle compared to your house.
wattage=amps x voltage, so it does play a roll in it all, just a different way of stating amps. people seem to like seeing watts better than amps. they prefer a 55 watt light over a 4.6 amp one even though they are the same thing stated differently.