X-ray in dental facility

[ammklq143]

I was talking to one of my inspectors last week about wiring in a dental office. I'm not even sure how this came up. I think I may have mentioned the empty 2" conduit that goes from the head wall to the foot of the chair and he said to make sure I don't use pvc. It has to be steel. I've looked through 517 and the only thing I could find was 517.60 and 61 that refers to hazardous and above hazardous locations (anesthesia). Anyone know what he was referring to when he said the conduit under the floor going to the foot of the chair has to be steel?
Thank you.

 

[roger]

He is talking about 517.13(A), it could be aluminum.

Roger

 

[PaulMmn]

Assuming the conduit is PVC, and is intended to power The Chair, would it satisfy the AHJ if you ran MC cable through the PVC?

 

[ammklq143]

Yep. That must be it. I would imagine the MC cable would need to be suitable for a wet location since it's under the concrete wouldn't it?

Assuming the conduit is PVC, and is intended to power The Chair, would it satisfy the AHJ if you ran MC cable through the PVC?

 

[synchro]

Assuming the conduit is PVC, and is intended to power The Chair, would it satisfy the AHJ if you ran MC cable through the PVC?

The following is an example of an MC cable that would meet the requirements:

https://www.mysouthwire.com/medias/sys_master/product-specifications/product-specifications/ha5/h7b/8854089334814.pdf

An article about the relevant code is here:

Metal-Clad Healthcare

A reader wrote in that an inspector had turned down one of his projects, citing the installation was in violation of National Electrical Code (NEC) 517.13(A) and (B) because Type MC cable was installed in the patient-care areas. The reader asked about the requirements for equipment grounding...

www.ecmag.com

 

[texie]

Yep. That must be it. I would imagine the MC cable would need to be suitable for a wet location since it's under the concrete wouldn't it?

If it is a slab on grade it will be a wet location. I have never seen HCF MC that is jacketed for wet location but I think it has fairly recently become available.

 

[texie]

Wet location HCF MC: https://www.mysouthwire.com/medias/...duct-specifications/hc6/h05/8854089924638.pdf
I'd put it in a pvc sleeve.