50 Amp Electrical hookup

msmith1199 wrote:
I just moved my motorhome to a new indoor storage location that has a dedicated electrical panel that I'm allowed to modify. The unit has several 15 amp plugs already installed. It has one 50 AMP I think 250 volt outlet, but the circuit breaker is labeled as 208 volt. I'm not an electrician so I don't know which it is.

So the question, can that 250 volt outlet be converted to a 50 AMP RV outlet? I know the 50 amp RV outlet has two 120 volt legs. Should this existing 208 or 240 or 250 volt (I guess I'll have to figure that out for sure) have the correct wiring for the RV outlet? It would be nice to have as that will allow me to run the A/C units while in storage as I plan on doing some work on it while indoors.

This is a commercial voltage and they're using two legs of a 3 phase secondary with a common 480vac primary.
As long as they pulled the neutral and ground in and since most RV's don't use 240vac for anything, you should be fine, as each leg to neutral or ground will read 120vac. Reason being is that these 208 hot legs are 120 degrees out of phase and mathematically, 208vac divided by the square root of 3 = 120vac.
If you were using 240, like for a range, more than likely, it just wouldn't get as hot as it should.