Fuse Amperage Question

[kicker06 10+ year member]

Well my mini-anl 120amp fuse and holder melted today and I need another one, this time not the mini. I am trying to decide if I should go with 150amp or 200amp fuse for the fuse holder.

My amps are connected through the same power cable to the battery. One amp has 3 40amp fuses (120amps) and my other amp has a 40amp fuse.

So 120amps + 40amps = 160amps.

Should I go with the 200 instead of the 150, since the fuses on the amps add up to 160amps?

200amps will be fine if my amps have 160amp fuses all together, correct?

BTW I am getting knukonceptz.

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[ultimate157 5,000+ posts]

Most important thing you left out: What size wire are you running? It doesn't matter what the fuses are on the amp (for the most part) as you are protecting the wire and not the amplifiers.

 

[kicker06 10+ year member]

4awg

I've had it running forever, and it was fine.

And no I am not changing it out for 2awg or 1/0.

It was a ***** to get it in the car and I am not going through that again.

Woudl you recommend 150 or 200amps?

 

[45auto 10+ year member]

4awg
I've had it running forever, and it was fine.

And no I am not changing it out for 2awg or 1/0.

It was a ***** to get it in the car and I am not going through that again.

Woudl you recommend 150 or 200amps?

The biggest you should be running with 4 gauge should be 125 to be on the safe side...

But you can still squeeze in a 150 amp fuse and be alright If you wanna live on the wild side. 200 amps for 4 gauge is out of the question.

 

[ultimate157 5,000+ posts]

4awg
I've had it running forever, and it was fine.

And no I am not changing it out for 2awg or 1/0.

It was a ***** to get it in the car and I am not going through that again.

Woudl you recommend 150 or 200amps?

150amp is already over the limit, and as ^ said, 200 is out of the question. How long of a 4ga run do you have?

Upgrading your wiring or running a second 4awg is the only thing I would do...

 

[kicker06 10+ year member]

I realize, I am going to talk to the shop to see what they can do.

They told me 1/0 would be hard to route through the firewall, so 2 4awg wire's might be out of the question.

 

[Duke 10+ year member]

What kind of shop is that? Routing wire would be hard for them? And X 2 on 125 amp fuse as the max on 4 gauge.