If the emergency generator locates indoor and we want to run the overhead feeder from generator to main emergency distribution panel (located in another room) and meet NEC 700.10(D)(1) without using concrete encased method, are there any products out there that meet the two hour fire rating wiring requirement per code? Thank you.
NEC 700.10(D)(1) - Emergency feeder
- Thread starter anbm
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Joe Villani
Senior Member
- Location
- Westchester County NY
Take a look a Vitalink MC Cable
http://www.omnicable.com/spec-sheets/vitalink-mc-2-hour-fire-rated-power-cable.html
Also MI Cable is an option.
Draka has a 2 hour rated cable but I think its only listed 2 hours in a vertical application.
Is the room sprinkled? Install the feeder under the sprinklers. That's another option
Joe Villani
http://www.omnicable.com/spec-sheets/vitalink-mc-2-hour-fire-rated-power-cable.html
Also MI Cable is an option.
Draka has a 2 hour rated cable but I think its only listed 2 hours in a vertical application.
Is the room sprinkled? Install the feeder under the sprinklers. That's another option
Joe Villani
borgem
New member
- Location
- Phoenix, AZ, USA
You will most likely need to dig through NFPA 99, to some extent, based on this amendment that was issued http://www.nfpa.org/assets/files/AboutTheCodes/70/Proposed_TIA_1293_NFPA 70.pdf
You are better off following the link and reading, than me trying to summarize it.
I have a hard time believing MC cable is 2 hour rated, but it looks legit. The referenced UL assembly even states vitalink:
http://database.ul.com/cgi-bin/XYV/...93.412310580.1501853891-1422371053.1500039230
It might have to still be protected in some sort of EMT or other allowable raceway based on 517.30(C)(3)
MI cable is listed in in 577(C)(3)(1). MC seems to need protection unless
(3) Listed flexible metal raceways and listed metal sheathed
cable assemblies in any of the following:
a. Where used in listed prefabricated medical headwalls
b. In listed office furnishings
c. Where fished into existing walls or ceilings, not otherwise
accessible and not subject to physical damage
d. Where necessary for flexible connection to equipment
Yes, for a hospital unless one of the exceptions in the previous post apply.
Yes, I would think so. I've always considered the exception for sprinklers to apply in most hospitals 700.10(1)(1). However, I've noticed the 2017 Handbook adds a commentary note that states that if the feeders are installed above a suspended ceiling, the area above the ceiling must also be sprinklered!!
That's a new one!! I'm not sure I agree with that interpretation, but I guess I'll be following it from now on.
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