LOW VOLTAGE FIRE ALARM

[sammiamm]

installing two 4 sq boxes back to back to feed outside strobe lite,4 inches of solid pour concrete seperates the two boxes,will a 1/2 in hole drilled through the concrete act as a good raceway?code? thanks for input!

 

[peter d]

Re: LOW VOLTAGE FIRE ALARM

What is the wiring method? Cable or THHN conductors?

 

[sammiamm]

Re: LOW VOLTAGE FIRE ALARM

wiring method is fplr , riser fire wire 14aug

 

[sammiamm]

Re: LOW VOLTAGE FIRE ALARM

it's a two conductor cable

 

[websparky]

Re: LOW VOLTAGE FIRE ALARM

The cable you are using does not require a conduit or raceway!

 

[sammiamm]

Re: LOW VOLTAGE FIRE ALARM

the nfpa 72 says all work shall be installed as per nfpa70, the nec,where is the listing or chapter refering to riser fire cable?penetrating outside walls,through concrete?i'm dealing with a NEW project manager that thinks the install will fail insp for not providing a sleve for the cable??any help

 

[websparky]

Re: LOW VOLTAGE FIRE ALARM

760.52(B)(2) Passing Through a Floor or Wall. In metal raceways or rigid nonmetallic conduit where passing through a floor or wall to a height of 2.1 m (7 ft) above the floor, unless adequate protection can be afforded by building construction such as detailed in 760.52(B)(1) or unless an equivalent solid guard is provided.

If I were the AHJ, I would allow it.

 

[sammiamm]

Re: LOW VOLTAGE FIRE ALARM

thanks for the lead, i will read that and perhaps have a job after the insp,,