Ground it to the home system.
I don't know the code details, but there is bare wire, known as "bonding
wire", that code requires run without any splices from the box to the actual
ground.

The important thing is that the ground be redundantly robust.
If there is a ground fault, a hot-to-ground leak in a powered appliance
would raise the potential of the chassis above ground.

Unlike neutral, which code says is to be bonded to ground at only one point,
it is considered good engineering practice to "grid the ground", meaning
multiple connections.

I would run an unspliced length of bonding wire from your box to the
generator.
Additional ground connections, such as a cold-water ground would provide
redundancy.



"Ignoramus24153" wrote in message
...
I am aware that "all generators must be grounded". In the instance of
a standby portable generator like this

http://igor.chudov.com/tmp/onan/Diesel/

how would I ground it? I have two options:

1. Ground it to a new grounding rod (expensive and involves actual
work).

2. Ground it to the home grounding system, such as copper pipes in the
utility room, or even better next to the existing home ground
connection.

Which option here is more legal and more safe?

thanks

i