shore power 110 or 220

1971duster340 wrote:
240V or 220V should be banned in most RV power supply discussions...it's confusing. Just because the receptacle in the shore power pedestal looks like your dryer socket, the electricity accomplishes different supply once it enters the dryer vs. your RV.
Think of your RV supply as having 2 seperate 120V wires that supply different portions of the RV, front half and back half in simple terms. While most 50A breakers are tied, if you could switch only one off, half your RV would loose power, but a dryer would only get half the voltage necessary to operate...bad news!
Electricians have wired a 120V, 50A RV receptacle incorrectly because it looks like that other, larger voltage supply they are familiar with...again, bad news.
Forgot to mention, the cable is fatter because it has 4 #8-#10 wires vs. 3 #10-#12 wires.

I think you're confusing the 30 amp 120v cord with the 50 amp 240v one. It's the 30 amp cord that looks like the old 3 wire 240v dryer plug. Electricians have wired the supply for 240v, 2 hots, ground and no neutral. That will destroy a 30 amp rv since it's expecting 30 amp 120v, 1 hot, 1 neutral and 1 ground. The 50 amp supply is a 240v supply, not 120v as you said.

The fact that the 2 hots of a 50 amp connection feed different circuits in the RV is no different than what happens in your house. If you have a gas clothes dryer and stove it's likely the only 240v load would be central AC unit. Everything else is 120v running off one of the 2 hot legs. 240v is not confusing, it's better that people understand the differences between a 30 and 50 amp supply than to assume they're all the same. That's when problems happen.