2 fuses or 1?

[stephens30228 10+ year member]

I just ran my first 0 gauge wire install, but I am running it to a distribution block that has 2 4gauge outs that will be ran to my Orion 2500d, do I have to run two separate 150amp fuses on them two power wires since I have already ran the 300amps at the battery, and the distribution block will have two 150amp fuses as well? Thank you, also what is the best way to ground the dual 4s? Will it be alright without a ground block if I run to separate grounds?

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[goingdef 10+ year member]

I only run the fuse under the hood, if something dead shorts in the back the fuse up front will go.

 

[stephens30228 10+ year member]

Well the distribution block has fuses that are required so I figured that would suffice. Just making sure is all, thank ya.

 

[keep_hope_alive Premium Member]

yes, when you reduce wire size you need another set of fuses.

fuses perform two functions:

1. short circuit protection

2. over-current protection

sometimes the over-current protection can be the fuses at the amp.

 

[sacsking916 5,000+ posts]

Who uses fuses anymore?

 

[stephens30228 10+ year member]

yes, when you reduce wire size you need another set of fuses.
fuses perform two functions:

1. short circuit protection

2. over-current protection

sometimes the over-current protection can be the fuses at the amp.

So overall 5 fuses in the wire, and the amp has no external fuses so I dont even know how many it has.

 

[keep_hope_alive Premium Member]

where do you get 5 from? one 300A at the battery. then you reduce to two 150A fuses in the distribution block, each protecting a 4 awg wire. from there, no more fuses are needed.

total of 3.

 

[stephens30228 10+ year member]

where do you get 5 from? one 300A at the battery. then you reduce to two 150A fuses in the distribution block, each protecting a 4 awg wire. from there, no more fuses are needed.
total of 3.

That's where I was gettin confused. I wasn't sure if the two after the split was the block or after the block.

 

[mylows10 5,000+ posts]

where do you get 5 from? one 300A at the battery. then you reduce to two 150A fuses in the distribution block, each protecting a 4 awg wire. from there, no more fuses are needed.
total of 3.

pretty much done here