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Electrical wiring rated to withstand 1000 degrees for 15 minutes

Electrical wiring rated to withstand 1000 degrees for 15 minutes

(OP)
Not sure this is the proper place to post. In Ohio building code there is a section that requires "wiring for operation and control" of some equipment to be protected to withstand 1000 degrees for 15 minutes. Is anyone familiar with a product that would meet this requirement or anyone in Ohio that has experience with this? Reference OBC 910.5.

RE: Electrical wiring rated to withstand 1000 degrees for 15 minutes

Does it read something like this::


6 Control wiring.
Wiring for operation and control of mechanical smoke removal systems shall be connected ahead of the main disconnect in accordance with Section 701.12E of NFPA 70 and be protected against interior fire exposure to temperatures in excess of 1,000°F (538°C) for a period of not less than 15 minutes.


RE: Electrical wiring rated to withstand 1000 degrees for 15 minutes

(OP)
cdafd - thanks for the link, that helps. Does anyone have any experience with a product that would meet these requirements?

RE: Electrical wiring rated to withstand 1000 degrees for 15 minutes

Stookey will know

I am thinking if it is done, it is put behind Sheetrock, and or routed to lessen exposure

RE: Electrical wiring rated to withstand 1000 degrees for 15 minutes

I don't have the Ohio Building Code but this is the requirement for the protection of conductors used for a mechanical smoke removal system in a building housing high piled combustible storage. I'm assuming the building is sprinklered.

Two options:

A) Depending on how the roof is constructed, one could perform an equivalent thickness calculation per IBC Section 720 to demonstrate it has a 10 minutes fire-resistance. At 10 minutes, the temperature under ASTM E-119 is 1,000 degrees F. http://isolatek.com/isolatek-typewb4/#test-tab
B) Request to use the 2015 IFC requirements which were revised in its entirety and deleted this requirement. The requirement was deleted because it's onerous and not necessary in a building with a properly designed and installed NFPA 13 sprinkler system.

RE: Electrical wiring rated to withstand 1000 degrees for 15 minutes

You can use an intumescent coating that satisfies this requirement for much higher temperature and longer than 15 min.

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