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#89038 08/26/04 03:02 PM
Joined: Feb 2004
Posts: 494
M
Member
Is BX or MC cable allowed in a rural medical clinic with patient exam rooms and xray? wood structure single story

If I remeber correctly it is NOT.

thanks for any reply

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#89039 08/26/04 05:52 PM
Joined: Jun 2004
Posts: 220
T
Member
517-2 def. of a health care facilities.it includes a clinic. 517-13(a) lists MC as an acceptable wiring method, as long as it's outer metal sheath is identified as a grounding path. the MC cable has to have an insulated ground in it. It is usually called Hospital grade, and has a green paint on it.

[This message has been edited by trekkie76 (edited 08-26-2004).]

#89040 08/26/04 07:05 PM
Joined: Jan 2003
Posts: 4,391
I
Moderator
Very unlikely you will get MC with a sheath that is an acceptable grounding conductor, I use MC all the time and have never seen the type of MC that has the right kind of armor for grounding.

What you need is hospital grade AC cable.

The outer armor is a listed grounding conductor along with the added green grounding conductor.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
#89041 08/27/04 07:23 AM
Joined: Sep 2003
Posts: 650
W
Member
Would there be any difference between hospital grade AC and hospital grade MC...other than the 'red hat' requirement [Linked Image]

-Jon

#89042 08/27/04 09:05 AM
Joined: May 2002
Posts: 1,716
R
Member
Jon, there is no such thing as HG MC.

Also remember that HCFC can not be used for Emergency Branch wiring.

Roger

#89043 08/27/04 10:47 AM
Joined: Jun 2004
Posts: 206
C
Member
Jon look at 250.118 (9) and 250.118 (11). That will explain the difference between AC & MC. Hospital grade Mc I'm told is custom order. Probably explains why I and iwire have not seen it.

#89044 08/27/04 12:26 PM
Joined: May 2002
Posts: 1,716
R
Member
Capt al, once again there is no such thing as hospital grade MC. There is MC with a sheath that is recognized as a ground per 250.118, and it is allowed for redundant grounding per 517.13, but that is not a Health Care Facility Cable.

Type HCFC is a true Armored Cable.

Go here for more info

Roger



[This message has been edited by Roger (edited 08-27-2004).]

#89045 08/27/04 04:39 PM
Joined: Jun 2004
Posts: 220
T
Member
well then, someone should start making Hospital grade MC becuase it is listed as a wiring method in 517-13a. Just because you have never seen it doesn't mean it can't be used or doesn't exist.

#89046 08/27/04 06:33 PM
Joined: May 2002
Posts: 1,716
R
Member
Trekkie, did you check the link I posted?

As far as MC meeting the requirements of 517-13 (99 NEC reference) some types can meet this requirement and the smooth type is one of these, but this still is not a "Hospital Grade" cable.

Yes, I have seen the smooth type MC, and you have too most likely. Some appliances have it installed from the factory, but as Iwire says it is not common in our field.

And I will say again, Hospital Grade MC does not exist, HCFC is an AC hybrid. [Linked Image]

Roger

#89047 08/27/04 07:45 PM
Joined: Jun 2004
Posts: 220
T
Member
the original post asked if mc was acceptable as a wiring method in a hospital. it is

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