When do u go from 4 gauge to 2 gauge?

[Bhhong 10+ year member]

Just wondering because I am about to run wires for a system. But incase later i wish to upgrade im wondering what type of ampage or power is the limit or efficient for a 4 gauge wire to a 2 gauge.....?

And I understand u should just run 2 gauge just incase to be safe but I am never really going to be pushing more than 800 watts total.....

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[andrewmoore13 10+ year member]

dont bother with 2 gauge get 1/0 and call it a day.

 

[abrhino 10+ year member]

if ur only running 800w dont worry about it

 

[QuikSilverRS91 10+ year member]

4awg is plenty if you're never breaking the 800w barrier. If you're thinking one day down the line you might want to through another thousand watts at it, ou might consider running the larger wire now. My thought process would be: Should that day come, we'll worry about it then.

 

[FenixAudio 10+ year member]

use ohms law to figure you current draw and reference the awg chart for total lenght of run and you will get your answer. or the bigger the better get 0/1 now and call ita day like the other guy said. 800w/14.4= 55ampers...4 will do forever. power/voltage=current(dymnamic).

 

[Sir Swish 10+ year member]

Knukonceptz 4 gauge is good for 100 amps. 1/0 is good for 250 amps