Fuse Size Recommendation
Senior Member
Joined: Sep 2003
Posts: 6,760
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From: Nebraska
Originally Posted by 2002BamaKR
Ok thanks everybody for the insight,I think I'll follow my first mind and go with a lower amped breaker...
Meh, circuit breakers arent exactley your best friend when it comes to car audio...
MOST circuit breakers take a lot longer to open ('blow' to put it in fuse terms) that a fuse takes to blow, which might be all the difference a little "blew a fuse" oops compared to a "toasted my amp" oops.
Over time a circuit breaker can become less and less accurate also.
Not to mention a fuse holder and a couple fuses should cost less than a breaker. If your good you should never blow a fuse anyway...
If you get a breaker, at least get a manual reset one...
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Joined: May 2004
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From: Reno, TX
Originally Posted by TXhustla
Actually I am going above recommended(gauge). Just not sure if the fuse should be upgraded to bigger fuse(along with wire)??
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Joined: Nov 2006
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fuse size
I went to rockfords web site and looked at the manual for the amp that you indicated. The amp has 3 40A fuses = 120A. I would match this rating near the battery with a 120A fuse, that way the amp can have as much juice as it needs.
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From: Reno, TX
Originally Posted by rkhillis
I went to rockfords web site and looked at the manual for the amp that you indicated. The amp has 3 40A fuses = 120A. I would match this rating near the battery with a 120A fuse, that way the amp can have as much juice as it needs.
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Member
Joined: Dec 2006
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From: Birmingham,Alabama
oh yea
Just for the record,I saw this site and it recommended a 150a fuse for those who were guessing.http://www.ikesound.com/product-product_id/2408
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Joined: Dec 2002
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From: Eastern TN
A fuse near the battery should have 1 sole function - to protect the battery and wiring should the main amp power cable become shorted to ground. It should be installed as physically close to the battery as feasible and should be sized to match the current capacity of the wire, at the maximum temperature the wire will be operating at.
The hotter the wire gets, the lower the current capacity of the wire.
If you want to try and protect your amp(s) with additional fusing, fuses should be installed near the amp and should be sized for the amp's current draw.
If the amp is a quality unit, it will be fused or have a circuit breaker designed into it anyway.
The hotter the wire gets, the lower the current capacity of the wire.If you want to try and protect your amp(s) with additional fusing, fuses should be installed near the amp and should be sized for the amp's current draw.
If the amp is a quality unit, it will be fused or have a circuit breaker designed into it anyway.
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Joined: May 2004
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From: Reno, TX
Originally Posted by B-Man
A fuse near the battery should have 1 sole function - to protect the battery and wiring should the main amp power cable become shorted to ground. It should be installed as physically close to the battery as feasible and should be sized to match the current capacity of the wire, at the maximum temperature the wire will be operating at.
The hotter the wire gets, the lower the current capacity of the wire.
If you want to try and protect your amp(s) with additional fusing, fuses should be installed near the amp and should be sized for the amp's current draw.
If the amp is a quality unit, it will be fused or have a circuit breaker designed into it anyway.
The hotter the wire gets, the lower the current capacity of the wire.If you want to try and protect your amp(s) with additional fusing, fuses should be installed near the amp and should be sized for the amp's current draw.
If the amp is a quality unit, it will be fused or have a circuit breaker designed into it anyway.
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Joined: Mar 2006
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Originally Posted by ieee_raider
No. Size it for your weakest link (in this case, your amp.) if you upsize your amp to use the full capacity of your wire, then simply upgrade the fuse at the same time.