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Fire alarm rough

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Tsull048

Member
Location
Boonton, NJ, USA
Occupation
Electrical Contractor
Recently I've gotten a small commercial job to do the wiring for fire alarm. There's about 12 devices, it's nothing major. I've done a job like this but it's been so long i was just wondering if someone could help me with materials.

Can I use CJs to support the wire going down studs?
Can I use romex buttons to enter my junction box? Using 1900 side mount with a single gang mud ring.
Do I need to sleeve wiring going from floor 1 to floor 2 if it's behind a wall?

I don't normally do this but it's slow as all he'll and I needed something. Any help is appreciated.
Thanks
 

gadfly56

Senior Member
Location
New Jersey
Occupation
Professional Engineer, Fire & Life Safety
Recently I've gotten a small commercial job to do the wiring for fire alarm. There's about 12 devices, it's nothing major. I've done a job like this but it's been so long i was just wondering if someone could help me with materials.

Can I use CJs to support the wire going down studs?
Can I use romex buttons to enter my junction box? Using 1900 side mount with a single gang mud ring.
Do I need to sleeve wiring going from floor 1 to floor 2 if it's behind a wall?

I don't normally do this but it's slow as all he'll and I needed something. Any help is appreciated.
Thanks
CJ's should be fine for wire support. Try to avoid using MC, just red "fire wire". Use FPLP for everywhere. The "fire alarm" MC is still black and white for the conductors and that confuses the fire alarm techs when they do their terminations.

Buttons are fine, but it's hella difficult to find anything that will actually grip the FPLP cable. Just use it to keep the FPLP away from sharp edges.

I think the code requires 6 or 12 inches of protection on floor-to-floor if "likely to be damaged", but if it's behind dry wall...? I might sleeve it anyway, especially if it's steel or aluminum studs, which is likely in commercial construction.
 

lordofthisworld

Senior Member
Location
Massachusetts
CJ's should be fine for wire support. Try to avoid using MC, just red "fire wire". Use FPLP for everywhere. The "fire alarm" MC is still black and white for the conductors and that confuses the fire alarm techs when they do their terminations.

Buttons are fine, but it's hella difficult to find anything that will actually grip the FPLP cable. Just use it to keep the FPLP away from sharp edges.

I think the code requires 6 or 12 inches of protection on floor-to-floor if "likely to be damaged", but if it's behind dry wall...? I might sleeve it anyway, especially if it's steel or aluminum studs, which is likely in commercial construction.
You can get red and black in fire alarm MC, u also can get Blue and white in fire alarm MC. I will use blue and white for the NAC loops and Black and red for the SLC addressable loops
 

gadfly56

Senior Member
Location
New Jersey
Occupation
Professional Engineer, Fire & Life Safety
You can get red and black in fire alarm MC, u also can get Blue and white in fire alarm MC. I will use blue and white for the NAC loops and Black and red for the SLC addressable loops
As long as you have a standard and stick to it, it doesn't matter too much what that standard is. (y)
 
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