ECN Forum Forums General Topics of the Trade General Discussion Area M.I. CABLES

Other than covering conduit in drywall is there any way or cables to give you two hour fire protection besides m.i.c.c.

Didn't even know conduit had a fire rating.
What is the application?

If it's for something like a fuel farm (pumping station) you probably could not do better than MI, all in all, it does not come out a lot more than Rigid if you're running a bunch of it.

Walls are fire rated, the individual components inside them are dependent upon them to provide the rating. Many applications you do want to insure a low smoke in case of fire.

If it's for Fire Pump or Emg. Cicuits VitaLink makes a 2 hr. mc cable. Check www.vitalinkcable.com

ITS FOR A COMMERCIAL FIRE ALARM INSTALLATION

I'm still confused. Why would a supervised Fire Alarm system need a two hour rating?

In the case of a fire, the system (hopefully) would have performed it's function in the vicinity of the fire, and any damage to the system wiring would be a moot point.

Roger

its spec,d this way for the risers

If you are looking for 2 hour rated fire alarm cable as described in 760.31(F), or http://www.ecmweb.com/ar/electric_ci_cable_2/ then check http://www.drakacomtequsa.com/lifeline/default.htm http://www.vitalinkcable.com/ http://www.tycothermal.com/northame...ts.asp?can=1013&pt=prod&pdid=796
Thanks for checking the spec, I've been specifying this cable for interconnection between the control panel and each notification zone for about a year now, and I have to struggle with the installer each time.

That is the only place I have ever seen MI cable installed. Feeding a disconnect for a huge fire alarm panel in a shopping mall we used to service. It also fed the 480v., 100HP motor for the booster pump for the system.
Before that I never even knew what the stuff was.
Why not just use the MI?

The reason i don,t want to use m.i.is cost,if i can achieve the same result at less cost why not.

You can't buy MI cable in a fire alarm rated configuration.