Hospital Grade BX

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Turbo1002

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Can someone please explain to me the difference between hospital grade Bx and standard BX. I am on the jobsite and I can not find anyone here who knows for sure.
Thank You for your time.
 
Turbo1002 said:
Can someone please explain to me the difference between hospital grade Bx and standard BX. I am on the jobsite and I can not find anyone here who knows for sure.
Thank You for your time.
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Hospital grade cable carries a redundant ground conductor.

"BX" (Type AC cable)utilizes the armoured sheath as an EGC because of the bonding strip(#18) contained withn the AC assembly.

"MC" does not contain this bonding strip, and as such, the jacket is not listed as an EGC.MC contains a seperate full sized and insulated EGC. There is an exception to this "general" rule...it must be labled as such. I have never seen this animal.

"Hospital Grade" list the jacket as an EGC as well as a full sized insulated EGC internally.

These links may help:
http://www.alliedeg.com/pdf/afc_install_guide_0704.pdf
http://www.southwire.com/processGetArticle.do?commonId=871db4f340643010VgnVCM1000002702a8c0____
 
The basic difference is that so called hospital grade (actually type AC-HCFC) has a green equipment grounding conductor, standard BX (AC cable) doesn't. Celtic has had done a good job of outlining why you would need to use one over the other.
 
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