Brake Wire
Thinking about running new wire for my Trailer Brakes , just not sure what size wire I should use.? The wire the manufacturer used is very thin.
Forum Discussion
theoldwizard1 wrote:larry cad wrote:
Most trailer wire harnesses use #10 wire which is rated at 30 amps.
That is for "continuou use" typical household wire. For a short time usage DC circuit less than 50' #10 can easily carry 50A.
Heating of wires and safety is just one factor. Voltage drop at the brake magnets is the issue here. Use a voltage drop calculator for 12 volt DC and you will see that 20% or more may be lost using typical wiring provided by trailer builders.
