anyway.... i need some help....

i got a PPI PCX1250 mono amp(250@4ohm 500@2ohm)
and
PPI 4 channel 30rms per channel amp

i'll be running the mono amp at 250rms

i'm currently using 8ga wires from the battery to the splitter....what fuse size should i be using at the battery and at the splitter?? if i leave it at 8ga will it be okie for now? what size ground?

if i should upgrade to 4ga what are the fuse sizes i should be using?? what size ground?

thanks....

Ground should be the same size as power. And 8gauge for those two amps is not good. Upgrade to better wire. Not sure on the fuse.

you need atleast 4 gauge for those amps not sure on fuse size

keep this in mind. whateve car audio guru tells you, you can back it down a little bit. for your information most HOUSES run on 4 guage wire, you think a little car needs that, with a couple of little amps?? 8 guage won't kill ya if your really dreading the extra work

Use a fuse same size as both your amps are fused at.

If one has a 40 and one has an 80, use a 100 or 120 amp ANL fuse... I only say 100 becuase I am not sure if they make 120's, but ideally that is what you should use.

And yes, 4 awg to the distro block.

Ground should be same size as power

ah my friend, you have much to learn about electrical theory and wire ratings

wire gauge is determined by the amount of current, not voltage, that goes through a wire.

houses run off 110/120, and 220/240

cars run at 12.5-14.4, most common avg is 13.8

now:
P = IV, I = P/V, V = P/I
WHERE:
P = power, in watts
I = current, in amps
V = volts

example 1 - lets say your 100 watt light bulb draws 108 watts (nothing is perfect)
in house, 108 watts at 120 volts, or, 108/120, thats .9 amps, which is not much at all

same example, in car, that 108 watt bulb at 13.8 volts, or 108/13.8, 7.8 amps, to produce the same amount of power.

example 2, more audio related.
400 watts of class A power, 50% efficient, total draw would be 800 watts
home amp = 800/120 = 6.66 amps
car amp = 800/13.8 = 57.97 amps

heres a vague wire chart of gauge power vs length ratings:
http://www.redrival.com/ixlnxtc24/wiresize.htm

wow I luv you "Ludlam"..... well not in that way...haha... . I learn something new everyday.

ludlam Realize i did say "8 gauge won't kill ya if you are dreading the work" sure 4 gauge 2gauge 00gauge would be better but 8 gauge is not going to kill him. he simply asked do i HAVE to go to 4 gauge.

nice science though.

so i can stay with the 8ga wires i have now? cuz i don't want to rewire the car cuz its a pain...


so the fuses i should be using from the distribution block
(120*2)/13.8=17.39 so 20amp?
(250*2)/13.8=36.23 so 40amp?

and from the battery the fuse should be
(370*2)/13.8=53.62 so 60amp?

but bluetroll, those are max output ratings...

you arent in any way using your amps to their max potential

confused???...... some other websites have different ratings...

http://www.electronixwarehouse.com/e...s/wiresize.htm

it says that 8ga is enough for 500watts rms.

are my fuse ratings correct?