Electrical Room Fire Rating Nyc

Question regarding the rating for emergency feeders for generators the 2011 nyc electrical code book article 700 9 d 1 2 3 4 5 6 all state 1 hour rating for fire rated assembly. Resistance rating fire protection rating or flame spread rating or required to be noncombustible fire retardant treated or slow burning shall be tested under the applicable test procedures specified herein in accordance with the acceptance requirements of section 27 131 of article seven of subchapter one of this chapter. Generator transformer rooms as per section bc 903 3 1 1 1 provided that a smoke detector connected to a fire alarms system is installed an alternative fire extinguishing system is provided and the space is within a 2 hour fire resistance rated enclosure.

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The fire resistance rating of exterior walls with a fire separation distance of 5 feet 1524 mm or less shall be rated for exposure to fire from both sides.

Electrical room fire rating nyc.

We are not doing any other emergency power work in the building besides adding fused disconnects at main service generator and fire alarm ats. Rated closet within the overall electric room to satisfy 2014 nyc ch. Any change which adversely impacts the fire resistance rating of rooms corridors shafts etc or which adversely impacts the operation of the building or area s fire protection system and or which adversely impacts egress. But the 2014 nyc bldg code chapter 27 2702 1 7 states to follow 2702 1 7 1 thru 2702 1 7 2 1 which states a 2 hour rated assembly.

The fire resistance rating of exterior walls with a fire separation distance of greater than 5 feet 1524 mm shall be rated for exposure to fire from the inside. The supporting construction for fire barrier walls shall be protected to afford the required fire resistance rating of the fire barrier supported except for 1 hour fire resistance rated incidental use area separations as required by table 508 2 in buildings of type iib iiib and vb construction. Any relocated mechanical equipment exterior wall roof intake exhaust louvers or added to new area s of building. We are planning on adding a dedicated fire alarm ats switch in its own 2 hr.

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