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Fire-proofing conduit

Fire-proofing conduit

Fire-proofing conduit

The conduit that supplies my client's fire pump controller with power runs through a room not protected by sprinklers.  Is there a product that I can apply (foam, blanket, etc.) to this conduit to make it fire resistant, even fire proof.  Re-routing the conduit is not an option.


RE: Fire-proofing conduit

Hi WTHall!

I went thru this same situation about 10 years ago.  Although the insurance inspectors were willing to let me get by with fireproofing and sheetrock (making the equivalent of a 2-hour enclosure around the conduit), the fellows from construction code enforcement were only willing to accept 4-hour construction as "equivalent protection" (i.e., still didn't meet code).  We had to put 4" of concrete around it.

Good luck with your situation!

Old Dave

RE: Fire-proofing conduit

Thanks for the response.

I forgot to mention that this conduit is running through the ceiling joists, about 10' above grade. Concrete doesn't seem like an option.  

RE: Fire-proofing conduit


If the cable length is short it may be easier to replace it by a fire resistance/MI cable, otherwise you may use Endothermic Ceramic Fiber Blanket (manufactured by 3M), they claim that they have a standard design for 3-hour rated electrical system protection.

RE: Fire-proofing conduit

Concrete and MI cable are the only two solutions I'm aware of.  The MI cable does sound cheaper, but I wouldn't overlook the concrete option until you get pricing.

RE: Fire-proofing conduit

I have previously bought cable tray protection from a company in Houston (http://www.e-cats.com/procon/index.htm) that is capable of withstanding severe fire (including hydrocarbon fires).  You will need to watch out as wrapping power cables in any system may require uo to de-rate the cable to prevent it overheating.

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