Wiring LED light bar
#1
Member
Thread Starter
Wiring LED light bar
Just got a 20" chinese light bar off eBay. Gonna wire it up this weekend. My question is...will 14/2 gauge wire be enough to run it? Ive got access to all the 14/2 I could want. The wires on the light bar seem to be about 10awg.
#3
Usually 20" bars are 120w and a 14g wire can handle 40a. So 14g would be plenty fine.
Gauge 12V
22 5A
20 8A
18 10A
16 20A
14 40A 40 amp x 12 V = 480 watts This is maximum in a perfect world on DC
12 60A
10 100A
8 150A
Gauge 12V
22 5A
20 8A
18 10A
16 20A
14 40A 40 amp x 12 V = 480 watts This is maximum in a perfect world on DC
12 60A
10 100A
8 150A
#4
Senior Member
That amp chart seems a bit high. There is no way I would run 40a on 14 awg wire. You might get it but that wire is going to be hot!! Plus if that wire goes from the battery to the cab then to the front of the truck your looking at like 12 feet of wire and that would cause like 22% voltage drop. Heck even at 120 watts which is 10a your still looking at almost 6% lost and that still more than the 3% you should shoot for. Ill go for 12awg min less drop = more light
#6
Member
Thread Starter
alright. I guess just to be safe Ill go get some 12/2 this weekend. Another question, do I need a relay or just wire it to a switch with an inline fuse? I want it separate from my high beams on its own switch
Ill try to get some pics up when i get it installed.
Ill try to get some pics up when i get it installed.
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#8
Senior Member
X2 if you dont want a relay go with a 15 or 20 amp switch