LV fire alarm system to HV box ok??

[ritelec]

Is it permissible to take wire ( low voltage wire) from a fire alarm system (panel) and bring it to a 120v smoke detector box and those two wires (HV and LV) be in the same box..

I would think if the Lv insulation was rated for the voltage it would be ok. But not if it where Lv wire .

Thank you.

 

[cadpoint]

760.41
760.48 (A) & (B) maybe... if NPLEA.

I've only every run a circuit over to power anything F/A, anything else had it's own
Piped run! ~

 

[gadfly56]

Is it permissible to take wire ( low voltage wire) from a fire alarm system (panel) and bring it to a 120v smoke detector box and those two wires (HV and LV) be in the same box..

I would think if the Lv insulation was rated for the voltage it would be ok. But not if it where Lv wire .

Thank you.

What is the purpose of bringing the LV and HV wire into the same box? Are you connecting a relay on the 120v smoke alarm to the FACP, or are they simply two ships passing in the night? If the later, install a barrier in the box to separate the HV from the LV.

 

[ritelec]

two ships passing in the night

I like Barry Manilow.....

What is the purpose of bringing the LV and HV wire into the same box? Are you connecting a relay on the 120v smoke alarm to the FACP,

Not me (curious) but yes.............and I would think the wiring would have to be rated for it and not just some bell wire...



sorry...couldn't find answer in above mentioned articles...will look harder.

 

[dhalleron]

It's possible if the fire alarm wiring is going to connect to a relay on the smoke alarm.

NFPA 70 -2011 760.136 (D) (1) or (2)