Re: using CAT5 for smoke detectors

[Jim Rojas <jrojas@xxxxxxxxxxxx>]

jewellfish wrote:
> Jim,
>
> Actually, NFPA 72 (2002-4.4.4.4) does not directly address wire size
> but redirects to NEC (NFPA 70).
>
> Assuming we are talking power-limited circuits, NEC places the 18
> gauge limit on single conductors.  If you are running THHN or
> equivalent in raceway then the wire must be at least 18.  However, in
> a multi-conductor cable, the minimum gauge is 26 gauge which would
> mean that CAT 5 would be ok, in that regard.
> Additionally, NEC (article 765) does certainly permit the substitution
> of general purpose cable for fire rated cable, so that, unless local
> amendments prevent it, regular CAT 5 could be used.
>
> Not saying its a good idea, but it is allowed.

The only thing I use Cat5 for in a burg install is for the telco line.

Jim Rojas