Fuse Help

[Mx3guy 10+ year member]

Ok Im have two orion amps the 600d and the 8004 they have a 50 and a 100 amp fuse. I have them hooked up with a 4 gauge wire im looking to run 1000 rms altogether.

What fuse should I get for these?

Im guessing maybe an anl 150amp fuse correct me if im wrong.

Thanks.

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[DC8 Flyer 10+ year member]

Keep in mind you are not fusing the wire to protect the amps, that is what they have the internal fuse for, you are fusing to protect the "wire" or more specifically your car.

From the wire guid on this forum:

4 gauge: ~140 amperes

Class D (~70% efficiency) -

Class A/B (~50% efficiency) -

 

 

I would think you would need at least a 2ga wire running to a fused distro block, the splits into at least 4ga to each amp.

 

On the other hand, since the 150 amps you get from adding the two fuse ratings together is the absolute max those amps together should ever pull (plus a percentage for the fuse to blow) you could get away with a 140 amp fuse on the 4ga (max amperage for that size wire), but if you really push the amps hard you may blow that fuse on a regular basis.

 

[Mx3guy 10+ year member]

Ok do you know where i can get a 140 amp fuse?

 

[DC8 Flyer 10+ year member]

I think I may have spoken out of turn about the fuse. I can't seem to find an ANL that is 140 amp, they seem to go in 30 amp increments, 60, 90, 120, etc. Also if you use 4ga for both amps you may start choking them off voltage wise as well, maybe. Is running a larger size wire or a second run of 4ga out of the question?

 

[helotaxi 5,000+ posts]

Try a 120A fuse. If it blows, then you need to upgrade your pos wire. If it doesn't blown then case closed.

Fuse rating of amplifiers is a terrible way to decide how much fusing or wiring you need for power. Under anything resembling normal use, the amp will not draw anything near the fuse rating. Especially for a mid/high amp I would be suprised if it drew even half of the fuse rating in current with music. My 225s have an internal fuse of 30A. I was running them bridged into my midbasses and I seriously doubt that they were pulling 15A each in that configuration.

 

[espguitarist91 10+ year member]

http://sonicelectronix.com/item_3462.html

140 amp fuse

 

[johnecon2001 5,000+ posts]

4awg with 150a fuse gets my vote.