cougrnut wrote:

After reading Day's post, I was wondering if I have some 0000 cable, and some 00 cable, but not enough of each to do both positive and negative runs of trunk battery relocation, which would be better for positive side, or is it a tossup? I bought the 00 years ago when it was under a Buck a foot, and friend gave me the 0000 wire. Also, does anyone have any good pictures or diagrams for battery relocation and 3g conversion? Lost most everything on my computer.....again. thanks, mike

 
I just did the 3g conversion on my fox. From what I read, whatever gauge wire you are using for the charging wire, the ground wire must be the same gauge.  Its only fair. Electrons flow in a circle from negative to positive.   Same goes for battery positive cable to solenoid and negative ground cables.

I also read that the megafuse should be rated at the size of the wire that its going to protect.  And the wire size is determined by how much amperage is going to be pushed thru it.  so the first thing to determine is how many amps may possibly be pushed thru that wire.   A 130 amp alternator can push 130 amps or more so it needs a wire that is rated at 130 amps.  A 4 gauge wire can easily handle 136 amps.  Now that you have the wire size, now you need to determine the fuse size.  Then to protect a 4 gauge wire, a 125 amp mega fuse is used.  Fuses don't break the instant it reaches its rating. It can go on for several seconds and maybe even minutes when its well over 130 amps.By that time  damage can occur to wiring and devices. so putting a fuse in thats rated at 175 amps will never blow before the wiring and devices get damages.  

On Daze's diagram it shows 6 gauge wire with a 175 mega fuse. I don't think that matches up well.

The wire that connects the megafuse to the battery ( or solenoid bat terminal if thats where you're going to connect the charge wire) should be the shortes length possible, since that section of wire is really unprotected.  The megafuse only protects the wiring between the megafuse and the alternator, it does not protect the wire between the megafuse and the battery.  By limiting the length of that wire to the shortest distance possible, the risk of that wire accidentally shorting to ground is reduced, and the lenght of wire that will need to be replaced later is less.