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Posted by on September 7, 2008, 2:35 pm
I will be installing a standby generator located about 50 ft. from the
grounding rod for my house. If I ground the generator only in main panel,
then there is a possibility that the generator frame will be at a slightly
different potential than the adjacent earth on which someone touching the
generator may be standing. If I install a ground rod at the generator
location, then I will be introducing a ground loop with its associated
problems.
How, according to the NEC, should the generator be grounded? Please
provide a code reference (or quote) if you can.
Many thanks for any help.
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Posted by ransley on September 7, 2008, 3:15 pm
On Sep 7, 1:35=A0pm, NoS...@aol.com wrote:
> I will be installing a standby generator located about 50 ft. from the
> grounding rod for my house. =A0If I ground the generator only in main pan=
el,
> then there is a possibility that the generator frame will be at a slightl=
y
> different potential than the adjacent earth on which someone touching the
> generator may be standing. =A0If I install a ground rod at the generator
> location, then I will be introducing a ground loop with its associated
> problems.
> How, according to the NEC, should the generator be grounded? =A0Please
> provide a code reference (or quote) if you can.
> Many thanks for any help.
Ground the frame where it is installed
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Posted by John Grabowski on September 7, 2008, 5:08 pm
>I will be installing a standby generator located about 50 ft. from the
> grounding rod for my house. If I ground the generator only in main panel,
> then there is a possibility that the generator frame will be at a slightly
> different potential than the adjacent earth on which someone touching the
> generator may be standing. If I install a ground rod at the generator
> location, then I will be introducing a ground loop with its associated
> problems.
> How, according to the NEC, should the generator be grounded? Please
> provide a code reference (or quote) if you can.
> Many thanks for any help.
There should be grounding requirements in the installation instructions.
Generally there is an external ground lug on the frame or housing of the
generator. This would get connected to your grounding electrode conductor
for lightning protection. There should also be an equipment grounding
conductor that is run with generator conductors to the transfer switch or
panel that you will be supplying the generator power to.
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Posted by HeyBub on September 7, 2008, 6:05 pm
John Grabowski wrote:
> There should be grounding requirements in the installation
> instructions. Generally there is an external ground lug on the frame
> or housing of the generator. This would get connected to your
> grounding electrode conductor for lightning protection. There should
> also be an equipment grounding conductor that is run with generator
> conductors to the transfer switch or panel that you will be supplying
> the generator power to.
Lightning protection? You got wire that'll handle 7,000 Amps?
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Posted by John Grabowski on September 7, 2008, 6:36 pm
> John Grabowski wrote:
>> There should be grounding requirements in the installation
>> instructions. Generally there is an external ground lug on the frame
>> or housing of the generator. This would get connected to your
>> grounding electrode conductor for lightning protection. There should
>> also be an equipment grounding conductor that is run with generator
>> conductors to the transfer switch or panel that you will be supplying
>> the generator power to.
> Lightning protection? You got wire that'll handle 7,000 Amps?
LOL. What do you think ground rods are for? For a generator a #10 may only
be required. For a house a #6 or #4 will suffice.
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> grounding rod for my house. =A0If I ground the generator only in main pan=