Amp wiring questions
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Joined: Jul 2006
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From: West covina, CA.
Amp wiring questions
I have 2 4-channel amps that I am going to put in my truck, 1 will be used for the door speakers and the other for my 10in subs bridged. Can I run both those amps with 1 #4gage cable running from the batt (with a 150a fuse under the hood) to the rear behind the seats and then add a distribution block to feed the amps? Is the #4 too small?
I can't remember the amp sizes but 1 is a older PPI and the other is some no name I've had for years.
I can't remember the amp sizes but 1 is a older PPI and the other is some no name I've had for years.
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Joined: Jul 2006
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Will you be ok?? maybe.. but why do maybe? Running this cable is something you will just want to do only once, so while your in there, run as low of guage as you can. Run 1/0 or even 3 if you can. The cost shouldnt be significantly more then the 4g.
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From: SE Ga
Add up the current rating for the 2 amps and multiply by 1.25. This will tell you what size fuse to use. For 150A, i wouldn't use anything smaller than 1 AWG. 140A - 2 AWG, 120A - 3AWG, 105A - 4AWG, 80A - 6AWG. This will keep you on the safe side.
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From: Slidell, LA
Originally Posted by cdjentz
Add up the current rating for the 2 amps and multiply by 1.25. This will tell you what size fuse to use. For 150A, i wouldn't use anything smaller than 1 AWG. 140A - 2 AWG, 120A - 3AWG, 105A - 4AWG, 80A - 6AWG. This will keep you on the safe side.
Depending on the size of the amps 4 ga will prolly work fine. 2 would be recommended.
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From: SE Ga
Originally Posted by Low_e_Red
And multiply by 1.25?!? Why not just use the appropriate fuse size?
Depending on the size of the amps 4 ga will prolly work fine. 2 would be recommended.
Depending on the size of the amps 4 ga will prolly work fine. 2 would be recommended.
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From: Slidell, LA
Originally Posted by cdjentz
the 125% is based on primary only fuse protection for transformers. if the fuse is the same value as the sum of amp currents, you just end up popping fuses occasionally when you load em up. if the amp has a built in fuse, you probably don't even need it. This is all based on National Electric Code, but it doesn't really address automotive applications. Just using it as a guide.
And YOU DEFINATELY NEED A PRIMARY FUSE!!!!!
Houses and non auto electrical is all non moving (for the most part). The auto enviroment is subject to so many variables. THE NEC DOESNT BELONG HERE.
