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Re: Generator Grounding Revisited


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Posted by John T on June 13, 2016 at 09:55:42 from (216.249.76.23):

In Reply to: Re: Generator Grounding Revisited posted by KCTractors on June 13, 2016 at 08:52:10:

1) I can answer your question IFFFFFFFFFFF I know if your genset has a FLOATING Neutral or not???

2) I suspect the Honda is FLOATING IE it has no Neutral to Frame/Case/Ground terminal BOND.

3) Like most gentlemen out there who aren't electricians or techs or engineers (and even many of them lol), they don't understand the differences and confuse grounding with N-G bonding and EARTH grounding which is completely separate. EARTH grounding is totally separate from N-G bonding, and EARTH grounding is not required by the NEC or OSHA for an RV or portable generator (kind of hard to drive down the road wired to a ground rod isn't it). Don't take my word for it, SEE MY OSHA POST BELOW which some just don't want to or refuse to believe I'm afraid, their being smarter then NEC and OSHA or for whatever reason is beyond me??????????

4) SOOOOOOOO HERES THE DEAL since its for RV use and is NOT going to be tied to a utility or utility transfer switch
YOU DO NOTTTTTTTTTTTTTTTTTT NEED TO DRIVE ANY EARTH GROUND FOR THE HONDA That's what OSHA says, that's what the NEC says
even if some lay gents and Billy Bob and Bubba insist otherwise. BUT THAT DONT MEAN THE MANUAL DONT SAY TO "GROUND" IT
because there are situations (depends on how its used) where N is bonded to case/frame and all that is attached to a ground
rod. As long as it says "ground" per the NEC they are covered. When a company makes a genset they cant know how it will be
used so they may Float the Neutral or they may not EITHER is correct in certain situations yet they still have to say Ground
per the NEC and in some cases an earth ground rod is required while in others its NOT and even a hazard SEE MY OSHA POST WHY

HOWEVER 1) THATS NOTTTTTTTTTTTTTTTTTTTTTT TO SAY ITS STILL NOT "GROUNDED" per the NEC because the term grounded can be
confused with Neutral to Ground BONDING. Its just NOT EARTH grounded to a rod driven down into mother earth

HOWEVER 2) If your RV does NOT have a fancy EMS monitor system it can still work and power whatever you have plugged into
it EVEN IF IT HAS A FLOATING NEUTRAL

HOWEVER 3) If your RV DOES HAVE an EMS and is indeed a floating Neutral as I suspect, THE EMS WILL PROB THROW AN ERROR CODE

HOWEVER 4) If it is floating and iffffff it trips an error code on an EMS THERE IS A FIX

HERES MY ADVICE A) Ifffffffffff the Honda has a Floating Neutral I would bond it to any available steel frame (if it has any) AND ALSO to the GROUND terminal in that 3 wire outlet. That's often done in the RV world using a pigtail SEE THE LINK BELOW. That simply involves a small jumper wire connecting N and G together in a plug plugged into one of the outlets or else inside an outlet itself.

B) DO NOT I REPEAT DO NOTTTTTTTTTTT DRIVE AN EARTH GROUND ROD AS OSHA SAYS THAT CAN CREATE AN ELECTROCUTION
HAZARD

NOW LISTEN CAREFULLY there are reasons why a new Genset may have a Floating Neutral (they ship millions out that way and they aren't stupid) and there are reasons when and where the N should be bonded to G and there are times when earth grounding MUST also used and any genset manual will say ground per the NEC BUT IT MAKES A DIFFERENCE DEPENDING ON ITS USE AND IF THERES A UTILITY OR TRANSFER SWITCH INVOLVED AND HOW MANY POLES AND IF NEUTRAL IS SWITCHED. I understand those differences but its nearly impossible to teach non electricians all this grrrrrrrrrrrrrrrrrr

SUMMARY I would NOT drive a ground rod,,,,,,,,,,If the Honda has a Floating Neutral and you use it as a portable or RV generator and do NOT ever tie it to a transfer switch or utility I WOULD MYSELF CREATE A NEUTRAL TO GROUND BOND. If theres no EMS it can still work floating however.

HELPFUL LINKS IF YOU DONT BELIEVE ME

1) Neutral to Ground Bonding in RV's by Jack Mayer:

https://docs.google.com/document/d/1X0A0bD4D-0n-GJmtEKK_ls5mYFdupgmqA1Xtb06JDLM/edit?pli=1

2) Generator Neutral ground Bonding:

http://noshockzone.org/generator-ground-neutral-bonding/

3) I have a PDF listing makes and models of Generators showing if they have a Floating Neutral or not but I cant get the URL link to it SORRY

Whewwwwwwwwww I'm tired

John T


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