2 hour rating for FA systems

[mshields]

I know that the backbone interconnecting FACP and transponders and/or terminal box's needs to be 2 hour rated but someone is telling me that the wiring out to the first device in a loop needs to be 2 hour rated. Is that true? Does it matter if this is a high rise or a low rise? In the instance that it came up, it happens to be a low rise. But I'm interested in both.

Thanks,

Mike

 

[cda]

Do not see it in the 2003 ifc, unless local ordinance

Are you under the international codes?

Have not heard the two hour rating for low rise, possibly in the newer codes?

 

[cda]

Ok look at 12.4 nfpa 72 2010 edition may also be in early editions

Still does not appear it is required in your situation, unless a local thing

 

[AegisFPE]

Could be that you have to get from your panel to a loop on the other side of a horizontal exit.

 

[cheyer]

Look at "survivability" of circuits in 2010, 72

 

[FM William Burns]

IMHO..........Cda and Cheyer are in the right ballpark. I recall an old test question associated to wiring protection and it having to do with one of the Articles in NFPA 70 for protection of the circuit and pathway. Maybe one of the electrical guru's can chime in.