On Sep 7, 11:35*am, wrote:
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

Grounding and bonding depend on whether or not is a seperatley derived
system or not. I assume you are permanantly mounting the generator
and it is not a portable unit. I also assume you are installing a
transfer switch. Is this correct? NEC 2005 Article 250 is where to
look.