Fire rated conductors

[mstrlucky74]

Attached says supports and hardware needed to meet fire rating. Could you not use your standard rack and threaded rod? Not sure aboutthe hardware part….don’t think they mean fittings. I’m going to use EMT with RHW-2. I only need 1 hour rating according to spec attached. Thanks.

 

[texie]

Attached says supports and hardware needed to meet fire rating. Could you not use your standard rack and threaded rod? Not sure aboutthe hardware part….don’t think they mean fittings. I’m going to use EMT with RHW-2. I only need 1 hour rating according to spec attached. Thanks.

You need to look at the UL White Book under FHIT, Electrical Circuit Integrity Systems. Fire rated wiring methods are rated as a system that covers all the details such as conductor type, raceway type, mounting hardware, etc. There are a number of "systems" recognized in FHIT each with their own specifications. Take look here: http://productspec.ul.com/search.php?type=listing&listing=FHIT
One of the most popular systems today is made by VitaLink for many applications: http://www.omnicable.com/spec-sheets/vitalink-mc-2-hour-fire-rated-power-cable.html
Following all the installation details that are part of the listing is critical for a compliant installation.

 

[gadfly56]

Attached says supports and hardware needed to meet fire rating. Could you not use your standard rack and threaded rod? Not sure aboutthe hardware part….don’t think they mean fittings. I’m going to use EMT with RHW-2. I only need 1 hour rating according to spec attached. Thanks.

The short answer is "yes". The slightly longer answer is to point you here to UL's page on this issue where you can see who is listed to which certification. You are looking at R19359, most likely. The systems are FHIT25A, FHIT25B, and FHIT25C. The hangers and whatnot will be described in the system documents. Happy hunting.