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Recommended Wire Gauge for Trailer Electric Brake Assemblies

Question:

Im rewiring a 19 foot flatbed trailer. What gauge wire should be used for the brake wire. I read where you recommend 10 gauge, but I thought that may be overkill.

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Expert Reply:

For brake assembly wiring, we recommend either twelve gauge wire # 12-1-1 or ten gauge # 10-1-1 due to the length of the wiring and the amperage required. Both of these options are sold by the foot. You will connect one end to the junction box using Ring Terminal - 12-10 Gauge Wire - 3/16" Ring ID # 44-5310A or a butt connector like # DW05745-5. The other end will use the same ring terminal to connect to the trailer frame or axle to provide ground for your brake magnet.

I've attached a couple articles to assist. The # DW04914-1 you asked from has 12 gauge wire and is used for many trailer wiring applications so 12 gauge wire for brake assemblies is very common.

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