when connecting an Alpine HU to the +ve battery terminal?

the power lead that is part of the Alpine 7894RB loom is the same gauge as an 8AMP wire, but it has a 20AMP fuse in it.

what ampage wire should I use when extending this to the +ve battery terminal? I'm thinking of using 8AMP wire.

cheers

db

 

You Shouldnt be running it straight to the battery anyway.. what gauge / dia is the wire?

David

 

the power cable on the Alpine loom has specific instructions to connect directly to the +ve terminal (this is to drive the amp, not the switch +ve)

as above, it is the same diam as an 8AMP wire, but, it has a 20AMP fuse in it.

 

You said head unit not amp..

Does it say 8awg??

if so that is a bit thicker.. ie like 5mm dia

David

 

Sorry, you've lost me here.

It recommends 8 AMP cable and has a 20 AMP fuse? That's just plain nuts.

If it's 8AWG cable, which as David says is around 5mm in diameter then I've never seen a head unit require this - however, the internal amp on this is 4x60W, which is a lot of juice... In which case you really do need 8AWG.

 

sorry to confuse you.

the alpine loom has a wire that says connect directly to the battery, it does not have any rating written on it, but it does have a 20AMP fuse in it. The gauge of this wire looks to be no bigger than an 8AMP wire. (but it is slightly thicker than the rest of the wires on the Alpine loom)

It is this wire that I am extending to the battery +ve.

having read the manual again, it does say use a 20AMP wire.

what does AWG mean?

[Edited by db - 4/4/2003 10:32:05 PM]

 

AWG stand for American Wire Gauge (sic), and 8AWG corresponds to 8mm^2 or 60A current capacity. That's a lot bigger than you need for a headunit !

Eight amp current should be plenty for a normal headunit.

Steve.

 

right, ignore that crap. the head unit has an amp in it that kick s out 4 x 60 watts. the reason you need a decent power supply at 20 amps is to ensure the wire won't melt/explode/turn into something nasty. all you have to do is get a wire that'll carry 20+ amps (about 3 quid from helfords) to ensure youre safe. If you're not using the internal, i wouldn't be so worried, but I have wired up my 7893 like this to make sure.

 

the main power supply wire in my scoob can carry up to 28amps and rn directlt from the battery; it might be overkill, but do you want to take a chance for the sake of a few quid and a potential fire hazard?

 

thanks everyone.

it will be sorted today !