Rendundant Ground Dental Office

[Ron Hill]

In a dental office where the receptacles are supplied with medical grad mc cable dose anything plugged into a receptacle also require a redundant ground?

 

[roger]

This would be outside the scope of the NEC but generally speaking, the answer is no.

Roger

 

[maghazadeh]

In a dental office where the receptacles are supplied with medical grad mc cable dose anything plugged into a receptacle also require a redundant ground?

Dose anything plugged into a receptacle also require a redundant ground?
No, 15 - 20A, 120V straight blade receptacles (single or duplex) has only 3 prongs (H + N + G).
The redundant ground wire is for bonding the metal box to grounding system. If you use EMT instead of MC cable, only one EGC required to be pulled with (H & N).

 

[Strathead]

If you use EMT instead of MC cable, only one EGC required to be pulled with (H & N).

This statement is a little misleading. If you use MC cable, it must be listed for redundant ground and as such, may only have 1 ground conductor as well. While I am not implying that you don't know this, others may not. You can not use regular MC any part of the conduit and wiring system that feeds patient care areas of a health care facility.

 

[maghazadeh]

This statement is a little misleading. If you use MC cable, it must be listed for redundant ground and as such, may only have 1 ground conductor as well. While I am not implying that you don't know this, others may not. You can not use regular MC any part of the conduit and wiring system that feeds patient care areas of a health care facility.

Originally Posted by maghazadeh
If you use EMT instead of Medical rated MC cable, only one EGC required to be pulled with (H & N).

Hope this will satisfys you concern, Since topic was about medical rated MC cable, I simply didnot repeat the wording and didnot mean regular MC. Thanks for clarifying.