no 2 awg is not fine for a big 3 when dealing with a 250 amp alt . what im saying is with a 250 w amp using 2 awg is simply not except able . ask mechman if you should use 2 awg for a 250w alt .
People go WAAAAAY overboard with the whole "big 3" thing. The whole concept that you need garden hose size charging wires when you're only running a couple K (or a lot less in this case) is completely unjustified.
In a situation where you have a car that happens to have undersized wiring and you're adding a big alt, of course some larger wires are a good idea, but in this case there's no way the 2 ga is the issue. It's more than enough for 2 or 3k imo - with 1/0 from batt to amps.
2 ga at a length of 5' will drop 0.2v at 260A. What is not acceptable about that??
And that doesn't even consider what stock wiring is already there, OR the fact that the alt will rarely, if ever, actually be producing that much current, especially playing music.
If you were to go with 0 ga voltage loss would fall all the way to .13v for a grand total of 0.07v difference.
Even at 00 it's a 0.1v difference, or essentially, no difference at all.
Math is your friend, use it.
seeing how electricity will take the path of least resistance with 2awg your creating more resistance then their needs to be.
no
if he were to up grade his big 3 to 0 or 2/0 or even welding cable his dimming issues will probity go away cause maximum amps for power transmission is only 94 amps while 0 is 150 you do the math cause i did and that's 56 amps of power hes losing.
Uhh, not sure where you're getting your data from, but 15' of 2 ga can deliver over 200A w/o dropping more than 1/2v at 14v.
if he goes to 2/0 then he picks up like 96 amps of power and with the 250amp alt figured in it goes like this for his loss 2 awg loses 156 amps 0 awg loses 100 and 2/0 he only loses 60 amps .
I have NO idea where you're getting those numbers. I would be interested to see it though.
