Dental office chair feed

[mjgilmore54]

I have to run a 120v 20a circuit to a dental exam chair.The building is on a concrete slab. I know that this is a paitent care area as per code 517.My question is can I feed this chair from the circuit panel with EMT and a separate grounding conductor run in the emt with the branch citcuit conductors.Or do I have to use rigid conduit. Thanks for any feedback.
M

 

[Twoskinsoneman]

I have to run a 120v 20a circuit to a dental exam chair.The building is on a concrete slab. I know that this is a paitent care area as per code 517.My question is can I feed this chair from the circuit panel with EMT and a separate grounding conductor run in the emt with the branch citcuit conductors.Or do I have to use rigid conduit. Thanks for any feedback.
M

the EMT with addition wire EGC is fine

517.13 Grounding of Receptacles and Fixed Electrical
Equipment in Patient Care Areas. Wiring in patient care
areas shall comply with 517.13(A) and (B).
(A) Wiring Methods. All branch circuits serving patient
care areas shall be provided with an effective ground-fault
current path by installation in a metal raceway system, or a
cable having a metallic armor or sheath assembly. The
metal raceway system, or metallic cable armor, or sheath
assembly shall itself qualify as an equipment grounding
conductor in accordance with 250.118.


250.118 Types of Equipment Grounding Conductors.
The equipment grounding conductor run with or enclosing
the circuit conductors shall be one or more or a combination
of the following:
(1) A copper, aluminum, or copper-clad aluminum conductor.
This conductor shall be solid or stranded; insulated,
covered, or bare; and in the form of a wire or
a busbar of any shape.
(2) Rigid metal conduit.
(3) Intermediate metal conduit.
(4) Electrical metallic tubing.

 

[texie]

Is this a slab on grade? If so, then you will need to go the rigid route.

 

[MarkyMarkNC]

Rigid or IMC in the ground, but you can change it over to EMT to go to the panel.

 

[infinity]

Rigid or IMC in the ground, but you can change it over to EMT to go to the panel.

What about if it's in the slab and not in the ground?

 

[Ponchik]

358.10 Uses Permitted


(B) Corrosion Protection. Ferrous or nonferrous EMT, elbows, couplings, and fittings shall be permitted to be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where protected by corrosion protection and approved as suitable for the condition.


I would never install it in the earth or concrete but it is code compliant with proper protection.

 

[MarkyMarkNC]

What about if it's in the slab and not in the ground?

Well, technically it is in the ground and not "in" the slab until they pour the concrete around it. :lol:

 

[annaneher]

I have to run a 120v 20a circuit to a dental office chairThe building is on a concrete slab. I know that this is a paitent care area as per code 517.My question is can I feed this chair from the circuit panel with EMT and a separate grounding conductor run in the emt with the branch citcuit conductors.Or do I have to use rigid conduit. Thanks for any feedback.
M

rigid conduit i guess