Outpatient ambulatory

H

hhsting

Senior Member
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Glen bunie, md, us
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Junior plan reviewer
I have outpatient ambulatory that has generator as backup. Their is one 200A ATS that feeds Panel M and S. Panel M has one circuit that feeds life and safety. Rest of the circuits in Panel M are critical or equipment branch. Panel S has all critical branch circuits.

Would NEC 2017 Article 700.3(F) Temporary Source of Power for Maintenance or Repair of the Alternate Source of Power apply here it only has one ATS that is mixed with life safety, critical and equipment branch? Its not life safety alone

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You appear to be in MD. If so, you're on the 2023 NEC which changes things a lot on this. Specifically the 2017 rule where 517 allows article 700. It's very limited after 2017. 2020 NEC and current specifically state which sections of 700 that can be used. So first question is: Are you on the 2017 or later NEC editions as that's super important to understand for life safety or critical branch circuits. Regardless, the answer you're wanting isn't what you'll get most likely. Redundency is an option for specific things, but that redundency comes at a cost. More info is necessary to know for sure.
 
Boingo1972 said:
You appear to be in MD. If so, you're on the 2023 NEC which changes things a lot on this. Specifically the 2017 rule where 517 allows article 700. It's very limited after 2017. 2020 NEC and current specifically state which sections of 700 that can be used. So first question is: Are you on the 2017 or later NEC editions as that's super important to understand for life safety or critical branch circuits. Regardless, the answer you're wanting isn't what you'll get most likely. Redundency is an option for specific things, but that redundency comes at a cost. More info is necessary to know for sure.
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In NEC 2017


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Boingo1972 said:
You appear to be in MD. If so, you're on the 2023 NEC which changes things a lot on this. Specifically the 2017 rule where 517 allows article 700. It's very limited after 2017. 2020 NEC and current specifically state which sections of 700 that can be used. So first question is: Are you on the 2017 or later NEC editions as that's super important to understand for life safety or critical branch circuits. Regardless, the answer you're wanting isn't what you'll get most likely. Redundency is an option for specific things, but that redundency comes at a cost. More info is necessary to know for sure.
Click to expand...

My question is Not about if certain items are allowed to be in life safety circuit or not.

See post #1 about my question
 
When you state outpatient ambulatory is it a outpatient ambulatory surgical center?

What procedures are being performed?

Are there Critical care spaces?

That would make a difference.

If your review has determined an essential system is required (which the drawing has me questioning) and you have a life safety branch I am not seeing anything in Article 517 (517.26) that amends 700.3(F).
 
Joe Villani said:
When you state outpatient ambulatory is it a outpatient ambulatory surgical center?

What procedures are being performed?

Are there Critical care spaces?

That would make a difference.

If your review has determined an essential system is required (which the drawing has me questioning) and you have a life safety branch I am not seeing anything in Article 517 (517.26) that amends 700.3(F).
Click to expand...

I have one ATS that feeds essential electrical system. Its not one life safety ATS only.

So my guess would be NEC 2017 Article 700.3(F) would apply only to life and safety circuits not the critical or equipment circuits. So how can one do NEC 2017 Article 700.3(F) to an ATS that feeds all three life safety circuits, critical circuit and equipment circuits?
 
hhsting said:
I have one ATS that feeds essential electrical system. Its not one life safety ATS only.

So my guess would be NEC 2017 Article 700.3(F) would apply only to life and safety circuits not the critical or equipment circuits. So how can one do NEC 2017 Article 700.3(F) to an ATS that feeds all three life safety circuits, critical circuit and equipment circuits?
Click to expand...

You put one docking station between the generator and the ATS.

There isn't anything that prevents you from adding a docking station to the supply for critical, equipment, or even optional circuits. It's not required, but certainly not prohibited. Docking stations have been around and used long before 700.3(F) became part of the code.
 
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