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Old 03-12-2019, 08:58 PM   #1
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So a question for those who do high rises.
I am beginning to run a job in a high rise hotel. The top floor sits 78’ off the ground level. I been doing some research and think that both NEC and IBC codes require 2hour fire rated wiring for elevators, and all emergencies circuits required for fire related situation. Meaning all elevator related, smoke removal fans, stairway pressurization, and the power circuits to the fire command center. Maybe others, but I think this covers the ones in this job.
IBC 27, and 30, NEC 700.10 .
The fire alarm is a “one up one down” system (as it was called to me) and has a mass evac system. It’s an 8 story hotel.
So I’m being told by the job super and my higher ups that I’m over thinking it and none of it applies. Am I? Or am I correct? I just want to try to prevent the nightmare later of haveing to come up with solutions to thhn inside emt for everything. By the way the fire pump will be ran underground under slab to address that 2 hour rating.
Any advice or input would be greatly appreciated.
Thanks
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Old 03-13-2019, 12:39 PM   #2
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You are over thinking it. Since the building is fully sprinklered (I assume) you are not required to have the 2 hr protection for the circuits you mentioned. The floor above and floor below voice evac is determined by the Fire Marshal and Fire Alarm Installer. Local jurisdiction call. Regardless, all those details should be supplied in the engineered plans.
No need to try and engineer it yourself. Submit an RFI if you feel strongly something is wrong and be prepared to back it up.
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Old 03-13-2019, 04:38 PM   #3
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+1 for Fault's answer.

High rise = all systems professionally engineered, signed and sealed.
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Old 03-13-2019, 06:54 PM   #4
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Ok thanks for replies. The plans call out for elevator wiring to be 2 hr rated. Did not for the other items, so my concern was it was assumed we should. When I asked one or two others, the answer was no. But never said why. Like because of the sprinklers. And yes it’s fully sprinklered. I am glad to be wrong on those issues.

By the way, the plans call for the fire alarm to be “all devices back to the FACPin 3/4 conduit, no plenum cable” it’s a class A system. Those words are spelled out on drawings. Would that mean no MC or would Mc cable be equivalent? Yes it can’t be free aired wire, but would MC be ok?

Thanks for the responses
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Old 03-18-2019, 09:56 PM   #5
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Quote:
Originally Posted by 68Camaro View Post
Ok thanks for replies. The plans call out for elevator wiring to be 2 hr rated. Did not for the other items, so my concern was it was assumed we should. When I asked one or two others, the answer was no. But never said why. Like because of the sprinklers. And yes itís fully sprinklered. I am glad to be wrong on those issues.

By the way, the plans call for the fire alarm to be ďall devices back to the FACPin 3/4 conduit, no plenum cableĒ itís a class A system. Those words are spelled out on drawings. Would that mean no MC or would Mc cable be equivalent? Yes it canít be free aired wire, but would MC be ok?

Thanks for the responses


Are you talking wiring method in the shaft?


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Old 03-18-2019, 10:12 PM   #6
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Quote:
Originally Posted by 68Camaro View Post
Ok thanks for replies. The plans call out for elevator wiring to be 2 hr rated. Did not for the other items, so my concern was it was assumed we should. When I asked one or two others, the answer was no. But never said why. Like because of the sprinklers. And yes itís fully sprinklered. I am glad to be wrong on those issues.

By the way, the plans call for the fire alarm to be ďall devices back to the FACPin 3/4 conduit, no plenum cableĒ itís a class A system. Those words are spelled out on drawings. Would that mean no MC or would Mc cable be equivalent? Yes it canít be free aired wire, but would MC be ok?

Thanks for the responses
You have to look in the specs and the shop drawings for the fire alarm system.
The plans are nice but the specifications supersede the plans.
It is going to come down to what the owner paid for and if what they paid for conforms to whatever fire ordinances the local Fire Marshal decides.
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