Are there any listed connectors for a GEC in EMT or is the jury-rigged stuff that I keep seeing the only way to make this connection ? All the listed connectors are for rigid conduit . I have seen GEC out of the EMT threaded through the connector at steel or the rod and then back to the EMT to a pipe clamp.
( At this point I'm almost ready to say all conduit raceways for GEC should be Non metallic or if the wire is large enough to just leave it with out conduit. I think that is what Soares stated 75 years ago. )
Actually I would consider the two photo examples to be "neat and workman" like. The Romex clamp is a nice solution. Now if the ground wire just exited the raw conduit I would consider that a bit sloppy but it would still probably pass.
Re: GEC to EMT Connectors#124412 09/28/0602:30 PM09/28/0602:30 PM
Even though there is obviously substantial metal to metal contact with the bare copper ground inside the EMT, The EMT must still be bonded by a listed means... Are those 2 screw connectors listed for this purpose?
I've used the clamp in JJM's post with an EMT connector before with no complaints from AHJ's
Re: GEC to EMT Connectors#124414 09/29/0608:27 AM09/29/0608:27 AM
Gus, the conductor must be bonded to both ends of the ferrous raceway per 250.64(E)
Ferrous metal enclosures that are not physically continuous from cabinets or equipment to the grounding electrode shall be made electrically continuous by bonding each end of the raceway or enclosure to the grounding electrode conductor. Bonding shall apply at each end and to all intervening ferrous raceways, boxes, and enclosures between the service equipment and the grounding electrode.
Re: GEC to EMT Connectors#124415 09/29/0612:07 PM09/29/0612:07 PM
I think I would reject the use of loomex connectors at the ends of the raceway as bonding method, but a bonding bushing a short piece of #6 and a split bolt rated for #6 and 3/0 or a lug under the same bolt as the ground lug would make me happy.
Re: GEC to EMT Connectors#124416 09/29/0612:10 PM09/29/0612:10 PM
(A) Bonding of Services The non–current-carrying metal parts of equipment indicated in 250.92(A)(1), (A)(2), and (A)(3) shall be effectively bonded together.
(3) Any metallic raceway or armor enclosing a grounding electrode conductor as specified in 250.64(B). Bonding shall apply at each end and to all intervening raceways, boxes, and enclosures between the service equipment and the grounding electrode.
This is also explained on pages 126 and 127 of the 9th edition of Soares.
[This message has been edited by Roger (edited 09-29-2006).]