Making sure how to test new RV outlets.
I'm having 400A service and RV outlets installed on a piece of property we bought in Washington. There will be three outlet boxes installed like you find at most RV parks with 1ea 50A, 1ea 30A 2ea 20...
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Industrial transformers are used on 400 ampere 240 3-wire service drops. Usually they have cooling fins on their exterior. The Kernuy nut clamps used on the distribution lines are twice as thick and are double clamped and many utilities seal 400 A service drops with weatherproof sealant. Once a year flood the grounding rod area with water if you live in a dry climate.
Phase to phase (240) must be rational as would be each phase to neutral. No more than 5-volts difference. When you go to install your main 400-amp panel make it so load (breaker) wires can be switched phase to phase if necessary to keep the load balanced.
Potential between phase to earth ground must be exactly the same at outlets as it is at the place where the earth grounding rod from the service drop is positioned. Potential at any point between neutral and earth ground is not to be permitted.
Phase to phase (240) must be rational as would be each phase to neutral. No more than 5-volts difference. When you go to install your main 400-amp panel make it so load (breaker) wires can be switched phase to phase if necessary to keep the load balanced.
Potential between phase to earth ground must be exactly the same at outlets as it is at the place where the earth grounding rod from the service drop is positioned. Potential at any point between neutral and earth ground is not to be permitted.
