wire size from alt to kill switch

[SilverEclipse96]

Im currently relocation the battery to the trunk. I ran 0ga from the front of the car to the battery in the trunk and I was wondering will running 4ga from the alt to the kill switch located in the trunk be sufficient?

 

[Absit]

It would completely defeat the purpose of running 0ga wire to begin with.

 

[DGajre777]

I run a 2 AWG wire from the alternator to the kill switch. Reason being that you need a thicker wire as you increase the distance that the current needs to travel. If you get a high flowing wire like Streetwires or something equivalent, you might be able to get away with 4 gauge depending on how you route the wire.

 

[SilverEclipse96]

DGajre - Did you do 2 runs of 2ga wire?

I might switch to 2ga wire. Reason I thought of using 0ga was because it was extra from a recent audio install but 2 runs of 0ga seems like over kill. idk

 

[krackit]

2 runs are necessary....so it's not overkill.....i use 1g for my relocate. but i wouldn't go smaller than 2g. no reason to get technical...but know the saying, only as good as the weakest link...well that's what the 4g would do to your 0g.

 

[dj-t]

I think 4ga is sufficient enough for the entire car (front to back) you wont have any noticeable drop in voltage. It really varies on how much output the alternator gives. If it is a 90amp alternator you may get away with an 8ga wire. You may not even need to run a wire to the battery in the back just connect it the the fuse box where the cable from the battery connects. Whatever amp/voltage the vehicle uses the remaining amp/voltage will travel back to the battery. Save those extra wire for a future project.

 

[DGajre777]

DGajre - Did you do 2 runs of 2ga wire?

I might switch to 2ga wire. Reason I thought of using 0ga was because it was extra from a recent audio install but 2 runs of 0ga seems like over kill. idk

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I did one run with 1/0 (zero) gauge and another run with 2 gauge. There were 2 reasons (1) no one in town had enough 1/0 (zero) or 2 gauge wiring in stock to do the entire thing, and I didn't want to wait 3 days for the wires to come in and (2) I needed a thicker wire to carry enough current for the amplifier.

I would not do a battery relocation with 4 AWG wires, the smallest I would go with is 2AWG.