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Old 05-16-2009, 05:39 PM   #1 (permalink)
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Tow rig trailer charging circuit

I need to add one to a vehicle, and I'm a bit confused about how to size the wire.

Is the wire size and voltage drop the determining factor for the charging battery? So if I want to send 30A down the line, size the wire appropriately for 13+V to reach the battery?

Also, fuse or self resetting circuit breaker? Leaning toward fuse.
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Old 05-16-2009, 05:54 PM   #2 (permalink)
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Mine is triple protected.

vehicle battery-switch-manual breaker-diode-trailer battery

edit: thought it was a breaker, it's a fusible link

edit2: I just looked at the trailer, I did change to a manual breaker.

some info here: http://www.pirate4x4.com/forum/showt...trailer&page=2
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Old 05-16-2009, 06:13 PM   #3 (permalink)
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10 guage. Use a manual reseting circuit breaker.
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Old 05-16-2009, 06:24 PM   #4 (permalink)
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Was considering something larger than 10GA to make more available power back there.

This is for a TT that will dry camp alot, giving the batteries on the camper a bigger shot at juice wouldn't be a bad thing.

EDIT: On the 10GA circuits, is that usually a 30A breaker or fuse that goes in?

Last edited by Travis Waldher; 05-16-2009 at 06:25 PM.
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