The voltage is 115-120V. As I turned things on the voltage dropped below 110. When the HW heater is turned on to electric it may turn off the power without a breaker tripping. The AC does the same thing. The difference is that the power goes out when the AC is running for a long time and the temp. outside the motorhome is excessive with high humidity. Even when the power goes out I have checked the main power panel and no breakers have not tripped. Breaker on power pole still on. The power cord runs into a electrical box inside a storage container and the connections to the RV are all tied together with wire nuts and nothing else! Thanks for all the suggestions.