2nd battery question

[dlugolinski 10+ year member]

I will be running a second battery and need to know the minimum size of the wire that can be run from battery to battey??? I was told by one shop only 1/0 and 0 gauge will do...another told me 4 gauge is fine. and alot cheaper since i have laying around...

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[supa_c 5,000+ posts]

it depends on the length of the wire.

id put up a wiring diagram but my internet is messed up:furious:

 

[BIG_SUPERMAN72 10+ year member]

Just go with whatever u have laying around.

 

[jleecong 10+ year member]

I have used 4GA no problem. 13' run with a stock 80A alt.

 

[JimJ 5,000+ posts]

just make sure it's properly fused //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Randy Savage 5,000+ posts]

just make sure it's properly fused //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Shouldn't need a fuse in between batteries...

 

[JimJ 5,000+ posts]

so what happens when the interconnecting wire shorts itself to ground...taking the battery with it...

 

[Randy Savage 5,000+ posts]

so what happens when the interconnecting wire shorts itself to ground...taking the battery with it...

That's when you punch yourself in the face for not knowing what you are doing...

 

[BIG_SUPERMAN72 10+ year member]

Ill punch u...

 

[dlugolinski 10+ year member]

That's when you punch yourself in the face for not knowing what you are doing...

thanks i used the 4 gauge and a fuse with the correct rating....i don't want to be punching myself in the face anytime soon.... :readytogo

tested and works, really tested so the neighborhood says //content.invisioncic.com/y282845/emoticons/furious.gif.fc81ca146dbff91fede3ed290dbc4f4c.gif

 

[BIG_SUPERMAN72 10+ year member]

Yea, i swear my neighbors are gunan sign a petition against my system lol. But luckily ive laid off cuz my H/u is getting fixed.

 

[helotaxi 5,000+ posts]

And actually you should be fusing the cable between them at both ends as close to each battery as possible. If there is a short in the wire (and you may not even do anything wrong to cause it, some ******* might rearend you, you never know.) you need to remove the current source from the short. You have a current source at each end of that wire so a single fuse isn't going to cut it.

 

[dlugolinski 10+ year member]

And actually you should be fusing the cable between them at both ends as close to each battery as possible. If there is a short in the wire (and you may not even do anything wrong to cause it, some ******* might rearend you, you never know.) you need to remove the current source from the short. You have a current source at each end of that wire so a single fuse isn't going to cut it.

the wire from the first battery to the relay isolator is a whole 4 inches then the length between the 2nd battery and the fuse is 6 inches so i feel pretty safe but thanks...but i do need to fust the battery to amps now...