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Old 05-24-2020, 07:26 PM   #1
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Brand: Thor Motor Coach
Model: Thor Outlaw 38RE
State: West Virginia
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THOR #17154
What gauge AWG for 12v ports

I’m thinking about adding a few 12v USB charging ports throughout the RV. I’ll be connecting them to local lights etc... as the power source. What gauge wire should I use? I’m thinking 18AWG copper would suffice. Will that work?

Additionally - I’m also running some 12v LED lights in the cabinets. I’m anticipating using 22AWG for these. Can I use the 18AWG Instead? That way I don’t have to buy 2 different spools.

Thanks folks!
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Old 05-24-2020, 11:47 PM   #2
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Iíd use 16 gauge through out. Easy to work with connectors are easier to use too.
That way if you decide to run something more than usb itís there.
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Old 05-25-2020, 01:12 AM   #3
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THOR #1469
So you're going to run power outlets off the existing wiring for lights. How many circuits (fuses) control the lights from which you are going to power the outlets?

You might want to determine what kind of load is already on those circuits before hanging too many more outlets on them.
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Old 05-25-2020, 01:19 AM   #4
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18 should suffice in both cases:

https://www.engineeringtoolbox.com/w...ges-d_419.html
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