What Size Wire 30amp
I would like to put a 30 amp RV plug on my garage. The service pole is about 80 feet from the garage. I was wondering was size wire I will need to support 30 amp service.
Forum Discussion
- It's not really a few dollars more, it's a few dollars more per foot. So about $200 extra. I know I'll never have an RV big enough to need 50A service so for me it would be $200 wasted. Plus 4/0-4/0-4/0-2/0 outdoor cable is an absolute PITA to deal with so the install will be much more difficult than a simple 8/2 pull. The weight difference is also significant, 0.2 lb/ft vs 1.0 lb/ft.
- Run what would be needed for a 50 amp outlet. A few dollars more--but a much longer term solution.
gbopp wrote:
Now would be the time to consider running wire that will handle 50 Amps, for future updates.
Exactly. for a few $$ more, go with a larger gauge for possible future use.
Ron- At 80 feet you can use 10/2, voltage drop will be 5V @30A. If your power is marginal you can go 8/2 and get 2V back but that's unlikely to make much of a difference.
Edit
Actually I forgot that you'll have the RV extension cord on the end, go at least 8/2. - Now would be the time to consider running wire that will handle 50 Amps, for future updates.
- No. 6.
- This website recommends #8 gauge wire:
https://www.icmag.com/modules/Tutorials/ElectricalSafety/1655.htm
