I went to a customers home today he has a fountain pump that is being fed from an extension cord located on his front porch to his fountain pump in the yard. The power that is in the yard and is supposed to run the pump is a mystery. I get 120v hot to nuetral and 110v hot to ground. When I unhook the pump from the extension cord and plug it into the power that is in the yard the pump does nothing. I don 't understand why the pump want run. Maybe because the circuit has lights on it. Any idea? Again the receptacle in the yard has 120V.