Posted by John T on September 05, 2011 at 15:43:49 from (173.243.181.15):
In Reply to: OT---Generator GFCI posted by Jiles on September 05, 2011 at 10:07:53:
Jiles, you say you like added safety as do I, its just a question of balancing potential nuisance tripping verus that added safety.
Theres some old wives tales about GFCI's I will try to explain and debunk.
1) YES they will still work on your portable genset regardless if its Neutral is bonded to mother earth or the gennys metal frame or the truck frame or the neutral isnt bonded to anything else
2) If theres a 5 millimap difference in the current going out the hot versus whats being returned by the neutral THE GFCI WILL TRIP and thats so regardless if the gennys Neutral is attached to earth or the gennys frame or the pickup truck frame or nowhere
3) On portable gensets with on board atatched receptacles used to power plug n cord conencted (to the genset) tools, ITS NOT REQUIRED TO BOND THE NEUTRAL TO MOTHER EARTH. The Neutral IS BONDED however to the gennys metal case/frame.
4) Another technical consideration. If the gensets case/frame is NOT in contact with mother earth and you come between earth (your feet DUH) and a live hot conductor (say your hand gets on a hot wire) YOU TECHNICALLY SHOULDNT GET SHOCKED IN THE FIRST PLACE as voltage is between Hot and Neutral NOT Hot and Mother earth buttttttttttt theres capacitance etc so you could still feel a tingle but it shouldnt be life threatening as it takes something like 50 milliamps thru the ticker for defib BUT NO WARRANTY THIS IS THEORY IM NOT RECOMMENDING IT LOL
5) The way they work is a Torroidal coil surrounds the Hot and Neutral conductors and if the current is the same in both no voltage is induced into teh coil trippign teh GFCI HOWEVER Id theres 5 milliamps less flowing back then the hot is supplying (leakage current maybe via your body or earth or a short etc etc ANYWHERE but Neutral) voltage is unduced and she trips
SUMMARY
SOOOOOOOOO THERES NO HARM IN USING ONE,,,,,,,,,,YES IT CAN BE SAFER (given certain circumstances), BUTTTTTTTTTTTT IF SHE NUISANCE TRIPS CONSTANTLY IS IT WORTH IT??????????????????????
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