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Old 10-21-2014, 07:37 PM
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Default How much current?

How much current would you feel comfortable with on two runs of cca 1/0? Cadence wire if that makes a difference.
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Old 10-21-2014, 07:46 PM
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Length dependant? Im assuming ~8ft runs. 200-250 amps (per run) comfortably. 300-325 would be pushing it. Obviously shorter runs will hold more in bursts.

Not an expert. Just my opinion.

Last edited by southernbass; 10-22-2014 at 06:33 AM. Reason: technicalities
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Old 10-21-2014, 09:18 PM
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Length would be two runs from alt to rear battery. I always thought a 17+ foot run can support 250 amps. I never had trouble using one 17 foot run to a Crescendo 3kwp at .5 ohm daily. Im not competing so not chasing tenths but still want to be able to support up to 4k if my plans change in the future.

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Old 10-21-2014, 10:44 PM
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I typically try to underestimate the norms in these situations. Under estimate on capacity, over estimate on current draw. helps account for real world dynamics.

And it's CCA, not OFC. It will handle temperatures better at the cost of conductivity. It naturally has it's own voltage drop, from my understanding. Plus I'm not sure where Cadence ranks in terms of wire. You got your 1/0 [which is really like 4 awg], "true 1/0", and then SHCA/Knu 1/0 which is closer to 2/0 imo. Obviously oversized has the advantage..but I think I'm getting sidetracked. Probably telling you what you already know anyway.

In short, You should be able to handle 4k fine assuming you have the actual electrical for it. 4k would be what? 400? 450 amps? In a perfect sine wave draw on an inefficient amp with soft clipping? Realistically, especially with rise doing it's thing, I wouldn't expect more than ~300 amps out of a 4K rms on the daily. and that's pushing it, imo. You should be fine.

Again. just speculation, someone feel free to correct me if I'm wrong.
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Old 10-21-2014, 10:52 PM
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If it's the same Cadence wire I have (the cheap stuff), it seems true-to-gauge. I think 200-250A per run with less than half a volt drop under full load would not be unreasonable.

Something to consider here is what the run is being used for. The alternator isn't going to be producing huge transient peaks of current like a battery is. You still want plenty of cross sectional area to reduce front-to-back voltage drop, but you won't have to worry about carrying anything over what the alternator is producing.
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Old 10-21-2014, 11:45 PM
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Lots of good info in this thread.
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Old 10-25-2014, 12:43 PM
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Quote:
Originally Posted by SPLEclipse View Post
If it's the same Cadence wire I have (the cheap stuff), it seems true-to-gauge. I think 200-250A per run with less than half a volt drop under full load would not be unreasonable.

Something to consider here is what the run is being used for. The alternator isn't going to be producing huge transient peaks of current like a battery is. You still want plenty of cross sectional area to reduce front-to-back voltage drop, but you won't have to worry about carrying anything over what the alternator is producing.
It's not like the front battery is isolated from the alternator.
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Old 10-25-2014, 01:02 PM
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Quote:
Originally Posted by andale927 View Post
It's not like the front battery is isolated from the alternator.
I dont have a front battery. The vehicle in question is a 5th gen Camaro. Battery's in the trunk
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