Isolated Ground Receptacles
Isolated Ground Receptacles
(OP)
Can I put isolated ground receptacles on the same 120V circuit as non-isolated ground receptacles? For example, pull a H, N, G, IG to each receptacle, connect only the H, N, G to the non-isolated, and the H, N, G, IG to the isolated?






RE: Isolated Ground Receptacles
RE: Isolated Ground Receptacles
"250.96 Bonding Other Enclosures.
(B) Isolated Grounding Circuits. Where installed for the reduction of
electrical noise (electromagnetic interference) on the grounding circuit,
an equipment enclosure supplied by a branch circuit shall be permitted to
be isolated from a raceway containing circuits supplying only that equipment ..."
Seems like that circuit must be dedicated to the isolated ground equipment. And another circuit can't share that raceway.
RE: Isolated Ground Receptacles
RE: Isolated Ground Receptacles
Consider an installation where a circuit leaves the panel in metallic raceway, transitions to PVC raceway buried in a slab and then rises up a wall and terminates in a metallic enclosure.
I would interpret this rule to allow the enclosure to be grounded by the IG conductor rather than pulling a second ground conductor through the PVC to ground the enclosure or outlet box..
Bill
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"Why not the best?"
Jimmy Carter
RE: Isolated Ground Receptacles
I don't see a restriction preventing this branch circuit from feeding both IG receptacles as well as those bonded to their enclosures and wireways. The 250.96 B restriction for "circuits supplying only that equipment" appears to apply when its the raceway/enclosure that is isolated.