50amp on 120/208 service

I understand NEC was updated to allow 208/120 in an RV park. Fine at your home or business too (for the RV). 240v appliances will run fine even if performance is a little lower. Plenty of condos and such have this configuration and work fine.

MASTER ELECTRICIAN. The only answer you need. With a commercial building, if an inspector sees something added that he doesn't like, he can pull the meter off the outside of the building until it get wired to his liking. Ask me how I know.

If it is a commercial building make sure a professional installs/ed the outlet

YOu will have no problems. NOTHING in yoru RV needs 240 volts (Minor exception if you have an ALL ELECTRIC RV that may not be the case) Everythign is 120 volt

THe only thing in MOST RV's needing 200 volt or more is an Inetlletec Energery Manager.. this is the device that sheds loads if you are on 30 amps. the 200+ is how it knwos you are on 50.

With 110/208 the current on the neutral will be a bit complex. but it will still be below 50 amps so you won't have a problem.

The 120/208 will not be an issue on most 50 amp rigs. Some newer larger rigs use 240 appliances. You said yours does not have any 240 appliances so you are good to go.
One thing you should do is make sure it is full four wire and is marked with orange and black label 120/208.

More than one wiring pattern for 3 phase 208 also older systems differ.Consult electrician, we had one young electrician who had never seen the older type setup. Don't take chances.

dougrainer wrote:
I think you need to consult a QUALIFIED Master Electrician. I would not rely on what anybody posts on these forums. I would think there is a REASON that they designate 208 versus 120/240. Doug

yea commerical power uses 3 phase 208 (usually 440 etc) for easier motor starts on large equipment due to 120 degree phase.

every commercial building you walk into is generally 208v, most just don't notice as they just need 120v

if your use is only 120, its not a issue. most switching supplies support 208v anyway, they actually support 100-240v

qualifications are i routinely plug into 208v 3 phase at work for my job using normal appliances.

I think you need to consult a QUALIFIED Master Electrician. I would not rely on what anybody posts on these forums. I would think there is a REASON that they designate 208 versus 120/240. Doug