What Size Wire is Needed to Power etrailer Electric Tongue Jack from Truck Battery?
Updated 10/27/2025 | Published 03/24/2025
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Question:
I bought one of your etrailer brand 3500 tounge jacks . I dont want to put a battery on my car trailer . What size wire should I use from My truck battery to a plug in the rear of the truck ?
asked by: Tom H
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Jon G.
10/27/2025
Hey Tom, how did things go running the 10-gauge wire and 40A circuit breaker from your truck battery to the rear plug? Your results could really help others setting up power for their trailer jack the same way.