Another argument, who is right?

[peter d]

I have gotten myself into a debate/argument over at a .DIY burglar alarm forum with one of the moderators there.

The thread pretty much explains it, but the argument started with his claim his claim is that that fire alarm circuits must use a minimum size of #18 AWG and my challenge.

Ok, so who is right? I maintain that FA circuit cables (power limited of course, I have not heard of any non-power limited systems still being installed) are only required to be a minimum of #26 AWG per 760.57 and 760.82(B)

If I'm wrong, I'll eat crow and chalk it up to a learning experience. If not, I hope Dave will have learned something too.

BTW, do you like my blatant rip-off of EScott's moniker?

 

[peter d]

Bump. Surely someone must have an opinion.

 

[RUWired]

Peter, 760.57 allows 26awg if the equipment is listed for 26awg terminals and you are using cable.I think this would be for the newer addressable systems.Otherwise 18awg cable or conductors would be needed.At least thats the way i read it. NFPA 72 4.4.4.4 refers us to use NEC wiring methods.
Rick

 

[peter d]

760.82(B) says that #26 is the minimum size for conductors in a multiconductor cable. Pretty cut and dry, IMO.

Single conductors shall not be smaller than #18. "Single conductors" means conductors that we pull through a raceway. At least that's how I see it.

 

[RUWired]

Peter,I agree with you,i was pointing out to the statement of where the equipment is listed for use with #26 wire, then it can be used on that system.Devices ,boards, etc. I have'nt ever checked for that listing before,but i'll start looking now to see if there's a rating.
Rick