A question for the Electrically Inclined

Discussion in 'The Powder Keg' started by TXplt, Apr 30, 2008.

  1. TXplt

    TXplt Gun Toting Boeing Driver Forum Contributor

    Almost feel embarassed, having been an engineer at one time. But I've though up a scheme which seems like it'd work great which means it's fraught with peril.

    For a temporary connection of a fuel powered generator into the mains of a house (without installing alot of switchgear) is there any hazard in the following (assuming the generator is properly grounded, etc.):

    The generator has a 240V standard 4-Prong 30A output and the dryer line in the house has a standard 4-Prong 240 30A plug. Both have circuit breakers at 30A and the ampacity of the lines for the dryer exceeds this (i.e. no overcurrent or overheating problem in the lines, and all the lines are protected by CB). Would there be any problem with turning off the main breaker (thus isolating the bus in the house from the outside electrical mains), Plugging the output of the generator into a 4-prong output plug and plugging this into the dryer outlet (assuming all the wires were correctly connected). The power would then be flowing in from the dryer connection to the mains of the house and could power them and an appropriate wattage/VA of household items ?

    All house lines are equipped with GFI.
  2. That is kind of a 'McGyver' fix but I have done similar thing and gotten by.

  3. Mooseman684

    Mooseman684 G&G Newbie

    I don't see why that would not work. I would put a sign on the Mains to remind you to UNPLUG the Generator before energizing .
    Also, I would not use a Large load on the system as the wires will only handle so much amperage running it "Backwards" so to speak...No Electic stoves, or heaters, or dryers...
  4. TXplt

    TXplt Gun Toting Boeing Driver Forum Contributor

    Thanks--it seemed to make sense. I was also worried about neutral return currents, but I'm thinking that the grounded generator (along with the house's grounded neutral) would have that covered.

    Maybe I'll try "ops testing" it.
  5. sell33

    sell33 G&G Enthusiast

    All we do at my gf's house is turn off the main and hook the cord for the generator straight into on of the 240 breakers like the air or dryer then just can't use w/e appliance we hooked the generator into....
  6. Muddog

    Muddog Guest

    Pull your meter and leave it by the meter can. If you leave your back porch light on so your linemen can find your service thats on the ground is pretty helpful too