4 gauge wire enough? RMS or total watt

[DefiantGSR 10+ year member]

I'm going to be using 4 gauge wire and its rated for:

4 gauge: ~140 amperes

Class D (~70% efficiency) -

Question is, will my diamond 400.4 (180X2 @ 4 ohm), diamond 400.2 (430X1 @ 4 ohm), and kicker 250.2 (~100X2 @ 4ohm) need a thicker wire?

Do I total up the RMS ratings or the total power ratings?

If I total the RMS ratings, I should be ok...but if i'm supposed to add the total ratings, I'm out of luck.

Which one is it?

Thanks

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[azbass 5,000+ posts]

just get 0

 

[aeronautica86 10+ year member]

according to the wire guide, it looks like you'd be pushing it, but still OK

however, I would suggest you just get 1/0 instead to be sure, besides, you'll want to upgrade eventually anyway. I bought a 4ga kit not long ago because it was big enough for what I had, now I'm buying 1/0 wire...

 

[eatank 10+ year member]

You will be fine. I am running a Treo SSX1500.1 and SSX75.4 off Stinger Expert 4 gauge and no issues at all. Heck I am running the SSX1500.1 at 1 OHM. It is just a mustang and no dimming nothing. Just my 2 pennies.

 

[j3bus2k3 5,000+ posts]

As has been suggested, get 1/0 and run it to your distribution block and then 4awg to each amp...

 

[DefiantGSR 10+ year member]

Let me make the question more clear..

Is the ratings based on RMS of the amp or max total?

 

[Big Dee 10+ year member]

Rms

 

[knukonceptz 10+ year member]

What length is the cable going to be running the 140A? If 10ft your more then fine, if 20, you are pushing it.

 

[DefiantGSR 10+ year member]

Well, it's 20. But I have a lot of wire left over...i could cut it.

Thanks Knu

PS: all my electrical stuff is from you haha