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Message: <blockquote data-quote="2400" data-source="post: 218127" data-attributes="member: 3254">With 7 blades I can do a lot. Here's what I use them for and the wiring gauge I used on mine, if you see 2 choices I used the bigger one (smaller number).10 gauge-------12 volt power10 gauge-------GroundI use at least 10 gauge wire for power from the tow vehicle to the trailer. That way I know I'll have at least 30-40 amps for charging. As I mentioned I have a battery on 2 trailers that I use to run winches, thats a high load use and I need to be able to recharge the batteries fairly fast. On the camper I have 2 BIG batteries that need to be recharged quickly when I'm towing or just sitting and using the truck to top them off. On my camper electrical system I use 2/0 welding cable for the positive cable to a 500 amp switch that lets me use battery 1, battery 2, both batteries or just shut them completely off.I have a 10 gauge ground in addition to the coupler/hitch connection. The operation of ALL your lights, battery charging and brakes depend on a good ground. I have a dedicated ground for all my lights, winches, brakes and auxiliary batteries on my trailers. On the 2 trailers that have winches I welded a 3/8" bolt to the trailer frame and use it to ground the winches, batteries and the ground wire from the trailer plug. That way as long as I have a bare spot on metal I have a good ground, I welded several 1/4" bolts for grounds for lights on it. I did the same thing for my camper, the ground wire from the plug, the batteries and grounds from the camper electrical system all go to bolts welded to the frame. I use 2/0 welding cable from the batteries to 3/8" bolts welded to the frame so I have a good clean ground for everything.</blockquote>

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