NEC 700.10(D)(1) - Emergency feeder

[Anestle]

Under 700.10(D)(1)(1), what does it mean by, "To be installed in spaces or areas that are fully protected by an approved automatic fire suppression system."

If I have emergency feeders running above the suspended ceiling, but the area has sprinkler coverage with heads pointing down. Does the area above the ceiling also be sprinklered too, in order to be considered "fully protected"?

 

[steve66]

Ha, I was just looking at this old post where I asked the same question.

https://forums.mikeholt.com/showthread.php?t=194880&highlight=


The handbook says yes, above the ceiling must be sprinklered, or you must use one of the other fire protective methods. I'm not sure I believe them.

There have been 2 TIA's on this paragraph. One seems to delete health care occupancies, and I cant figure out what the other one changed.

See TIA 17-7 and 17-8:

https://www.nfpa.org/codes-and-stan...ds/list-of-codes-and-standards/detail?code=70

I'm still confused on this too.

 

[packersparky]

Ha, I was just looking at this old post where I asked the same question.

https://forums.mikeholt.com/showthread.php?t=194880&highlight=


The handbook says yes, above the ceiling must be sprinklered, or you must use one of the other fire protective methods. I'm not sure I believe them.

There have been 2 TIA's on this paragraph. One seems to delete health care occupancies, and I cant figure out what the other one changed.

See TIA 17-7 and 17-8:

https://www.nfpa.org/codes-and-stan...ds/list-of-codes-and-standards/detail?code=70

I'm still confused on this too.

The one just added "with a minimum two hour fire rating" to 700.10(D)(1)(3).


I think it would be up to the AHJ to determine if a suspended ceiling separates a room or corridor into 2 spaces. Around here it is considered as two separate spaces. And we do not adopt the TIA's.

 

[PaulMmn]

I know they make/made ceiling tiles out of styrofoam. IIRC, The idea was to sprinkler the above-ceiling space, and when the fire reached the ceiling from below, the tiles would melt, drop away, and the fire would trigger the sprinklers.

This would hide the sprinklers and the piping, yet protect both the above and below.