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#98999 - 07/05/06 04:13 PM Generator v. SDS
George Little Offline
Member

Registered: 01/18/04
Posts: 1492
Loc: Michigan USA
Is it just me or are others wrestling with Kohler about how to lift the bonding on their generators so they can be used with the "neutral" on bonded at the generator? The reason for the question is I am seeing small generators (10 kw) 120/240 single phase generators coming from the factory with a tag on the generator indicating the neutral is bonded to the frame of the generator and that it can be removed in the field for applications where it should not be bonded. Example: Back up generator permanently installed using a 2 pole transfer switch. The neutral is bonded to the frame of the generator and the neutral of the utility is also bonded at a different location. Now we all know the rules about bonding the neutral in two places and this scenario is a violation. Now here's the hook- Kohler tells you that the neutral is bonded to the frame but they don't tell you how to lift the bond or where the bond is. I can read specs and prints and they are silent about this bonding or shall I say un-bonding.
It is standard procedure for Kolher to bond the neutral to the frame at the factory for testing and they always ship them out from the factory with the neutral bonded to the frames and as such they are separately derived systems.

Maybe the title should be SDS v. Not

[This message has been edited by George Little (edited 07-05-2006).]
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#99000 - 07/05/06 07:23 PM Re: Generator v. SDS
Yoopersup Offline
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Registered: 03/04/03
Posts: 826
Loc: Michigan
George
The Generator folks I;ve worked with say they send them out that way because there not sure if they'll be hooked up as a Seperately derived system or not so they can be corrected in the field if required. Such as 3 phase 4 wire with a 4 pole is a S.D. system 3 phase 4 wire with a 3 pole transfer switch is not.Depends on the transfer switch in each case.
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#99001 - 07/05/06 07:27 PM Re: Generator v. SDS
Yoopersup Offline
Member

Registered: 03/04/03
Posts: 826
Loc: Michigan
George
The Generator folks I;ve worked with say they send them out that way because there not sure if they'll be hooked up as a Seperately derived system or not so they can be corrected in the field if required. Such as 3 phase 4 wire with a 4 pole is a S.D. system 3 phase 4 wire with a 3 pole transfer switch is not.Depends on the transfer switch in each case.
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#99002 - 07/05/06 07:36 PM Re: Generator v. SDS
George Little Offline
Member

Registered: 01/18/04
Posts: 1492
Loc: Michigan USA
Ernie, I don't have a problem with that- Sending them out that way, but Kohler don't tell you anything about where the jumper is or what to do to change it. They only show a skimpy block diagram of the components and nothing about any bonding jumper. I've always thought of Kohler as a rather reputable company but I'm having second thoughts now since their technical support is so lax. Generac and Onan know how to handle this situation so they get my vote.
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#99003 - 07/05/06 08:04 PM Re: Generator v. SDS
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
I spent some time on the web site and this is not in any of the PDFs about installation.
Have you tried asking the tech support?
I think this should be on a big label somewhere.
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#99004 - 07/05/06 10:22 PM Re: Generator v. SDS
frenchelectrican Offline

Member

Registered: 02/06/03
Posts: 938
Loc: Wi/ Paris France { France for ...
for 10 KW Kolher generators the bonding strap will be loacted in main control panel near the circuit breaker you will see the netural termail strip it is small wire or band.

that where the bonding strap will be located

but for other generator manufacter it is straght foward job i useally ask them in ahead of time and they will do it before they arrive in the site or location where the generator will be at and i just make quick look to double check make sure doing the proper way

Merci , Marc
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