thanks for all the great replies and discussion. as i understand it MC is not allowed for use in a medical facility. there are SPECIAL TYPES of ARMORED CLAD OR ALUMINUM SHEATH cables that will meet the requirent of 517. plain old MC or BX would get shot down if you ask me. ENT is not even an option at all.
i am glad to be in the know about this subject it could pay off..
as far as i can tell, you need an approved sheath or jacket for the cable and it has to be metallic. this part of the cable assembly has to be approved for use as EGC to meet the requiremnts.
it is easy to identify this type cable.
thanks again for the discussion
[This message has been edited by mustangelectric (edited 08-31-2004).]