Fuseholder and Fuse question

[plyer3 10+ year member]

I was told I need two fuseholders and fuses. I have two batteries, one in front and one in back. The front is fused but the car shop said the back doesn't need to be.......so does it or not? Oh it has 250amp fuse, do I need something bigger? Running an Alpine PDX-4.100 and an Orion 1200D, but will upgrade to a 1500watt amp soon.

Thanks

Click to read more...

 

[jco1385 5,000+ posts]

two batteries, front and back?

that means 2 fuses, 18" away from each. so yeah. 2 fuses

and i have my 1/0 fused at 300a between batteries

 

[plyer3 10+ year member]

yup, hmmm he told me there was no need for fuse in the back battery....

mehh, looks like ill have to get a fuseholder and install it...

 

[jco1385 5,000+ posts]

he doesn't do this shit everyday either.

 

[gqjeff 10+ year member]

Fuse size is rated for the gauge of wire.. I would run 1/0 and use 300 amp fuses... I would fuse right after the second batt or just get a fused dist block to run the power wire from the rear batt into that and then use 4 ga out to the amps.. So you need 2 amps/fuses... Or 1 fuseholder/fuse up front and then a 2 fused dist block coming out of the rear pos...

 

[plyer3 10+ year member]

everything's been installed, shittt lol

 

[plyer3 10+ year member]

i need to get that fuseholder fast then.

the front has 1/0 gauge fuseholder and 250amp fuse installed. the back has nothing, just battery and both amps are coming off of that batt....

 

[Pioneer~Saturn 5,000+ posts]

You need a fuse near each battery on the positive run(s) because if the run shorts out in the middle, it'll start drawing off both batteries...the front fuse will blow, but then the back will keep drawing and all kinds of bad happens...so yea, I'd fuse near the rear batt

 

[jco1385 5,000+ posts]

yep, def throw another one in there. and step it up to 300a between batteries.

 

[plyer3 10+ year member]

alright, sounds good. will upgrade the 250amp fuse later as well. thanks