electrical conduit passing through a Generator room

[mshields]

Thanks David and to all

Thanks David and to all

I started to work on the questions and saw that you had already covered it. Yes, that was my point. We still have the onerous requirement for 2 hour rated feeders. Our lone MI, Pyrotenax salesman with no competitor, trying like hell to make it to retirement, is safe for the time being. Although the 517 code board has screwed him over where the Critical Branch is concerned when in 2014 it was no longer deemed part of the Emergency system and therefore not subject to our version of Article 700. i.e. it can now be run via EMT.

But what we no longer need to do is have a separate room for Emergency Distribution equipment provided the room is sprinkled.

Thanks again and thank you to all of you for all the input.

 

[steve66]

Mass. amendments or not, doesn't NFPA 110 still apply?

For a room with a generator, there is this:

7.2.1.3  No other equipment, including architectural appurtenances, except those that serve this space, shall be permitted in the EPS room.

And for transfer switches, there is also this:

7.2.3* Level 1 EPSS equipment shall not be installed in the same room with the normal service equipment, where the service equipment is rated over 150 volts to ground and equal to or greater than 1000 amperes.


Edit: I probably should have posted all of 7.2 for reference:

7.2  Location. 7.2.1  Indoor EPS Installations. The EPS shall be installed in a separate room for Level 1 installations.
7.2.1.1  The EPS room shall be separated from the rest of the building by construction with a 2-hour fire resistance rating.
7.2.1.2  EPSS equipment shall be permitted to be installed in the EPS room.
7.2.1.3  No other equipment, including architectural appurtenances, except those that serve this space, shall be permitted in the EPS room.

 

[mshields]

wow - good discussion

wow - good discussion

Thank you all!

I whole heartedly agree that tee'ing this up with the inspector early in the design stage is always smart.

 

[mgookin]

Thank you all!

I whole heartedly agree that tee'ing this up with the inspector early in the design stage is always smart.

If your Mass amendments and NFPA 101 are both in play, don't forget to involve both electrical inspector (or plans examiner who spends more time in the code book) and the fire marshal. In my 20 years in the bldg dept I saw many, many times where someone goes to one or the other only to fail at CO inspection by the other.