Upgrading 100A to 200A?



Yes. In subpanels neutral and ground are not bonded. There is a link in the box that can be taken out to separate the two.

A ground rod for your sub? Is this in an out-building?

Its *ALWAYS* done in your entrance panel.
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On Sat, 31 Jul 2010 14:08:20 -0500, " snipped-for-privacy@att.bizzzzzzzzzzzz"

"The Company" grounds "their neutral" AT THE PIG, at the base of THAT POLE! Using a huge sheathed or unsheathed, solid copper wire of like #8 size into a 6' or 8' copper clad steel ground rod. That attachment node is very important!
The COMPANY REQUIRES the CUSTOMER to ground the neutral of "their service", which should be a direct feed from the aforementioned pole, ALWAYS at the entrance panel, directly to Earth or Ufer ground via various accepted methods. Usually a ground rod.
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Think "equipotential" grounding.
Tie the earth, the house sits on, and all the equipment shells inside, to the same potential as the grounded neutral entering your house. No differences = no shocks.
in message "The Company" grounds "their neutral" AT THE PIG, at the base of THAT POLE! Using a huge sheathed or unsheathed, solid copper wire of like #8 size into a 6' or 8' copper clad steel ground rod. That attachment node is very important!
The COMPANY REQUIRES the CUSTOMER to ground the neutral of "their service", which should be a direct feed from the aforementioned pole, ALWAYS at the entrance panel, directly to Earth or Ufer ground via various accepted methods. Usually a ground rod.
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