hey men i have a horse trailer with a 120v marquis generator 7000 it has 2 30amp breakers i can get about 28 amps per leg in the trailer i have 2 qo square d breaker boxes 2 20 amp breakers a piece on leg from gen to each breaker box . when plugged into shore power 50amp service i catch one leg of the 220 output for each br box it works pretty good but i was reading one of the other threads about the neutral wire . is there a problem using the 220 neutral when it goes to 120v on shore power . thanks :cowboy:
For a 30 amp @ 240 volt feed (10 gauge wire) you can feed only one allotment of 28 amps from your 120 volt generator to the on shore power system. (You can connect the single generator hot to both hots of the transfer switch.)
You may not parallel the outputs of two generator receptacles with a grand total of 56 amps to feed the 10 gauge lines. In the 120 volt generator the two allotments are not out of phase with each other and will overload the shared neutral.
You must never construct, possess or use a cable or adapter with two or more male plugs, for example to plug into two receptacles at the same time.
You may not hook up the generator to the dock end (far end) of the existing line intending to reverse feed the on shore building where the meter is because there is no way to guarantee that connection to utility power is disconnected before the lines are energized using the generator. But you can have a separate line run from a transfer switch or interlocked breaker at the building panel down to a parking space for the generator trailer and this line is used for no other purpose besides hooking up a generator.
In the U.S. there is no such thing as a 220 (240) volt neutral.