Re: Electricians??

Posted by John T on November 19, 2016 at 10:12:08 from (209.94.253.137):

In Reply to: Electricians?? posted by Goose on November 19, 2016 at 07:36:02:

Goose, I can tell you the proper way to connect the generator but it gets a bit complicated and you have to read and understand this because not being there to insure everything I have to cover all the bases. BEWARE of opinions that could create a hazard and consult a local trained professional electrician and the NEC and local authority who are there and can verifiy what I cant know sitting here OVER ANYTHING POSTED HERE ME INCLUDED LOL.

1) My best "guess" not being there is if your genny has 4 wires, its a 120/240 volt single phase three wire.
2) Some gennys come from the factory with a BONDED Neutral others come with a FLOATING Neutral AND IT MAKES A
DIFFERENCE AS TO HOW TO WIRE THEM.
3) If theres low to zero ohms from the Neutral to the Gennys steel case/frame (Ground) ITS A BONDED NEUTRAL
GENNY...HOWEVER if theres an open circuit from Neutral to case/frame (Ground) its A FLOATING NEUTRAL
4) The Four wires are Two hots (Red & Black??) Neutral (White) and Green/Bare Ground

HOW YOU WIRE THE GENNY AND TRANSFER SWITCH DEPENDS ON IF YOU SWITCH THE NEUTRALS OR NOT

(A) If you have a two pole (2 hots) Transfer Switch TS and ONLY switch the Hots but NOT the Neutrals (Utility and
Genset Neutrals are bonded in that case) the Genny requires a FLOATING NEUTRAL meaning if theres a N to Ground
BOND you must sever and disconnect it and the utility Green/Bare equipment ground wires to the gennys case/frame
and the Genset does not require connection to a Grounding Electrode IE GENNY IS NOT A SEPARATE DERIVED SOURCE

(B) If you use a 3 pole TS and switch the Neutrals and 2 hots, Genny needs a bonded Neutral,,,,,,,,,Is configured as
a Separate Derived Source,,,,,,,,Requires a Grounding Electrode (such as a driven into earth rod)

If you plug and unplug (poor mans TS) and use 3 pole 4 wire grounding plugs and receptacles that's a 3 pole transfer
and switches the Neutrals, meaning the Genny is wired as a Separate Derived Source with a Bonded Neutral that needs
connected to a Grounding Electrode

YOU MUST USE A PROPER TRANSFER SWITCH/METHOD SUCH THAT YOU CANT BACKFEED THE UTILITY !!!!!!!!!!!!!!!!!!

CAUTION if you use a portable genset on a construction site to feed power tools from onboard receptacles DO AS OSHA AND THE NEC RECOMMENDS AND DO NOTTTTTTTTTTTTTTTT BOND THE GENNY TO A DRIVEN TO EARTH GROUND ROD AS THAT CAN CREATE A POTENTIAL LIFE SAFETY HAZARD. Billy Bob and Bubba and some lay persons may not understand this so consult OSHA and the NEC and do as they say not me or Billy Bob lol

BEWARE AND DO THIS RIGHT AS IT CAN SAVE YOU OR A LINEMANS LIFE AND DO AS THE NEC SAYS NOT ME OR ANYONE (whos not there to insure and verify what you have) HERE IS MY BEST FREE PROFESSIONAL ADVICE

John T Too long retired and rusty Electrical Engineer and rusty on the NEC so NO WARRANTY

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