GFI requirements in Dental office

[bradleyelectric]

I'm working on a proposal for a dental office working off dental equipment suppliers layout. What are the requirements for GFI protection in dental patient care areas. I know HC MC. Basically each patient care area has a quad under the seat, 2 general use outlets on opposing walls, an xray, a ceiling mounted TV and a data outlet.

How about what is required for mechanical ground for the xray?

Thanks to all replies.

 

[chris kennedy]

Unless the governing body of the facility designates the area as 'Wet Procedure Location' (highly unlikely) then you only need to see 210.8(B)(5).

Remember 517.13 when slabbing those chairs.

 

[bradleyelectric]

Unless the governing body of the facility designates the area as 'Wet Procedure Location' (highly unlikely) then you only need to see 210.8(B)(5).

Remember 517.13 when slabbing those chairs.

Thanks Chris. It is an existing professional center with this suite on the second floor, so my intention is to use poke throughs to power the chairs. Everything possible in patient care areas with HC MC. I may feed the poke throughs with EMT. I need to run 2" PVC for the rest of the equipment (vacuum and air) to the chairs. This place is all wood frame with drop ceilings and romex currently. The panels are all downstairs in an equipment room with an on site dope smoker. I'm planning on pulling a 125A panel to the space, half on which is xray load.

 

[tyha]

you need to check with the dental equip supplier because you usually dont need to acually set floor boxes they generally want you to stub up in the template they have for the chair bottom along with the plumber and mount recp on the inside of thier equipment or they will take it from there. make sure all is in metal conduit with couplings aproved for grounding. We have done quite a few dental offices in the past and all but maybe one did we actually use floor boxes. so you may be able to pick up some money there.
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[bradleyelectric]

you need to check with the dental equip supplier because you usually dont need to acually set floor boxes they generally want you to stub up in the template they have for the chair bottom along with the plumber and mount recp on the inside of thier equipment or they will take it from there. make sure all is in metal conduit with couplings aproved for grounding. We have done quite a few dental offices in the past and all but maybe one did we actually use floor boxes. so you may be able to pick up some money there.
​

sounds good, thanks

Can the light fixture plug into the outlet under the chair? They don't have the best details, but it does look like they just want a quad under the chair.

 

[tyha]

no, you need a seperate line in the ceiling for that. Usually the framing contractor comes in and needs to frame a backing in the ceiling for the light and you drop an mc cable to a box that will either have a switch in it for you to connect to. If it doesnt you need to mount a switch on your junction box.

 

[Joe Villani]

no, you need a seperate line in the ceiling for that. Usually the framing contractor comes in and needs to frame a backing in the ceiling for the light and you drop an mc cable to a box that will either have a switch in it for you to connect to. If it doesnt you need to mount a switch on your junction box.

Be careful here IMO this light would have to comply with 517.13 (A) & (B) and standard MC cable would not be permitted.

Even if this light complied with 517.13 exp 2, standard mc cable is not permitted.

This is often missed in the field. Gus explained it very well in a previous thread.

 

[raider1]

Another thing to think about is if the exam rooms contain nitrous oxide then you would need to have hospital grade receptacles and unit equipment supplied emergency lighting in accordance with 517.61(C)(2) and 517.63(A).

Chris

 

[bradleyelectric]

Thanks everyone. I excluded unit equipment supplied emergency lighting in patient care areas due to lack of information and planned on HC MC and hospital grade recepticles in same areas due to these were spec.ed in these areas on other projects of the type we've done.