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Old 05-24-2020, 07:26 PM   #1
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WearyTraveler's Avatar
Brand: Thor Motor Coach
Model: Thor Outlaw 38RE
State: West Virginia
Posts: 256
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!

Charlie and Jamie
2017 Thor Outlaw 38RE
Maysville, West (by God) Virginia
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Old 05-24-2020, 11:47 PM   #2
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Brand: Thor Motor Coach
Model: 29h outlaw
State: New Jersey
Posts: 351
THOR #5248
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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Brand: Entegra
Model: Accolade 37TS
State: Virginia
Posts: 4,818
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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2020 Entegra Accolade 37TS
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Old 05-25-2020, 01:19 AM   #4
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Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 5,366
THOR #7035
18 should suffice in both cases:

Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad
2020 Chevy Colorado Z71 Trail Runner Alternate Toad
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power, usb

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