MC cable

[arrail.thomas]

Is MC cable fire rated for 2 hours if so whats the reference. Also EMT...I had a contractor ask us to pull conduit out a tilt wall because he says there not rated so we have to run conduit on the outside wall.

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[luckylerado]

He is mistaken. Point him to section 713 of the building code

 

[Ponchik]

I don't think conduits are fire rated.

IMO, fire rating is the ability to stop the spread of fire (sheetrock, plastic boxes, fire pads...) Even if the EMT or the MC had any fire rating, how is it going to stop the spread of fire?

Did he the contractor ask for fire rating or plenum rated?

If I am incorrect someone will set me straight.

 

[roger]

It sounds as though the GC doesn't think conduits or cable assemblies are allowed in rated walls, is this correct?

Roger

 

[augie47]

as far as Conduit:
From the Steel Tube Institute
Steel conduit and tubing are considered noncombustible by the building codes. They do not have fire ratings. This question is usually asked relative to the penetration of a fire-rated assembly or use in an emergency circuit, fire pump, or mass transit vehicle (see Question 4 for information on NFPA 130 “Standard for Fixed Guideway Transit and Passenger Rail Systems”). The NEC does not require these thermal protection methods where conduit is installed in fully sprinklered building.

1.) Penetrations
The NEC® and building codes require the sealing of openings around raceways that penetrate a fire rated assembly. This requirement is to prevent smoke, gases and flames from migrating from one area to another. There are many listed penetration fire stopping systems that can be used to seal openings; the listing instructions should be strictly followed.Most building codes permit the openings around galvanized steel RMC, IMC and EMT in concrete or masonry to be filled with cement, mortar, or grout. However, since local codes sometimes vary, these requirements should be checked prior to installation.