ECN Forum Forums Code Related Discussion NEC & other Code issues 517.13

actually I'm not sure one way or the other I was told it was the county but when I tryed to verify it I got nowhere. All I know is we had to change the AC cable as it was they allowed MC cable with an indepenant ground but the new code book puts a stop to that so I have to find something I can use as an alternative.

The wording of this Section has been slightly changed, but the intent is still the same as it was in the '96 NEC. It is exactly as Don stated above.
M/C cable could only be acceptable if the armor was an approved grounding path. I've seen an M/C with a continuous corrugated, not interlocked, armor. Not sure how it was rated or who made it. To my knowledge there's no manufacturer that makes an M/C with an interlocked armor approved as a grounding path.
A/C cable, though is approved.
It sounds like you better break out the EMT bender, as flex isn't acceptable as a grounding path either.(LA used to accept square cut Al flex years ago, but doesn't any longer)

You've got us CA kids wondering to which County you are referring. Please don't keep us guessing.

Take a look at the MC/IG Cable on the following page (bottom). It lists it specifically as being acceptable to 250.118

Look at the last type of Cable on this page (MC/IG)
Note also that they have a Technical Support Link and Tele# on the Bottom of that page.

http://www.afcweb.com/mctype.html



[This message has been edited by Bill Addiss (edited 11-11-2001).]

A FEW years ago while working in a patient care area, on a hospital addition we used a cable that came with a duel listing MC/AC.
It also came with a hospital grade listing.
It got the MC listing because it had the green insulated conductor it got the AC listing because it had the continuous bonding wire, It got the hospital grade because of the combination of both.

[This message has been edited by David (edited 11-11-2001).]

Electure
The area in California was Sacramento all I know it was a lady inspector down there that told us we couldn't use AC-HCF for an Isolated Ground Receptacle in a Dentists office. It caught use by surprised because it had been allowed every where else up to this happening.