Trailer wire guage / size

Reply Subscribe

Thread Tools

Search this Thread

Feb 12, 2009 | 02:08 PM

53ford

Thread Starter

Tuned

Joined: Feb 2003

Posts: 351

Likes: 42

From: Birdseye, IN

Trailer wire guage / size

I am reworking my 18 foot car hauler and want to upgrade my wiring.
It is a tandem axle w/ four electric brakes. I want to run a rubber coated
( SO type ) multiconductor cable from the 7 pin plug about 6 feet and splice in to existing wiring under the trailer. My question is what is the recommended wire size or guage that should be used? I have access to 7 conductor 20 guage rubber cord, but I feel it may be too light, especially for the brake wiring. If anyone would have this info I would appreciate it.

Thanks

Feb 12, 2009 | 05:39 PM

250turbo

Senior User

Joined: Dec 2005

Posts: 425

Likes: 2

From: anaheim,ca.

the bigger the better,i think 14 is min.

kurt

Feb 12, 2009 | 10:09 PM

rebocardo

Post Fiend

Joined: Jun 2002

Posts: 13,873

Likes: 3

From: Atlanta GA

14 gauge on the lamps and such, 10-12 on the brakes.

West Marine has a chart in their catalog for amps/distance/gauge so you can pick the correct min. sized wire.