We have an inspector who walke thru a project for a commerical office space open office floor plan, where there was an IT room with some racks and a server or two small rack mounted ups, a small air handler was provided as the buildings existing system did not have adequiate capacity to cool the space plus they shut it down on weekends etc. The electrical system was installed per code (first 4 chapters) there is no raised floor and the room altho the walls go to deck is not a "rated room" the inspector is indicating we need an e-stop to comply with article 645 of the NEC however the purpose of article 645 is to take advantage of less stringent installation methods provided the room is built to certian specifications / requirements? am i interpeting this correctly, that because there is IT eqipment in the room does not mandated compliance with 645 this is just an "option" to utilize less stringent methods of installation if certian requiremnts are met?
Article 645
- Thread starter Mike01
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- Logan, Utah
You are correct. IT rooms don't have to comply with Article 645 unless you want to take advantage of some of the less restrictive wiring methods allowed in that article. The inspector is wrong in requiring the E-stop.
Chris
Chris
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
You are correct. EPO is not required. Plenty of articles out there to support your position. There was just in CSE magazine.
I agree with the other replies
Edit to Add: 645.4 describes when Article 645 applies. If you don't meet all of the conditions there, then Article 645 simply does not apply. I believe condition 1) there is the disconnect to which the inspector referred? Since you don't have it, 645 does not apply.
Edit to Add: 645.4 describes when Article 645 applies. If you don't meet all of the conditions there, then Article 645 simply does not apply. I believe condition 1) there is the disconnect to which the inspector referred? Since you don't have it, 645 does not apply.
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ron
Senior Member
- Location
- New York, 40.7514,-73.9925
inspector141
Senior Member
- Location
- Westminster, MD
Mike, you are correct. You have chosen to wire the room based on chapters 1-4. Now if you are taking advantage of some of the wiring methods that fall under 645, then you must comply with 645.10.
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