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joebedford's avatar
joebedford
Nomad II
Jun 04, 2015

Wot size wire for buried cable to 50A RV receptacle at home?

I'm planning on putting a sub panel in my shop on the side of the house where my RV is stored during the summer. Not worried about the gauge of wire from the main panel to the sub panel - a problem fo...
kaydeejay's avatar
kaydeejay
Explorer
Jun 05, 2015
joebedford wrote:
Big Katuna wrote:
You will never use anywhere near 50A on each leg. Rarely over 25 per leg unless you run microwave, hair dryer and an electric heater.

You could use dual 30 breakers and drop the wire size to 8. You could still run both ACs microwave and fridge.
I hadn't thought of that. Given that it's rarely used in that location 30A per leg would be plenty.
NEC code says #8 wire is good for 40A, so that is what I have with a 2-pole 40 amp breaker for plugging in at home.
Local inspector signed off on it.

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