Greg G. wrote in message
...
Robert Galloway said:

Don't know much about this but it seems like I remember that the code
most places prohibits more than one ground. Aren't you required to have
a ground for the main service or panel and no secondary ground at any
sub panel?

If the sub-panel is located in a separate building from the main
panel, code generally calls for a local ground for the sub-panel.

Generally you are required to have another grounding electrode (typically a
ground rod) but not necessarily a connection between earth and neutral at
that subpanel. the ground rod is for lightning protection.



Greg G.