smoke detectors
- Thread starter jnsh2
- Start date
- Status
stud696981
Senior Member
Re: smoke detectors
In my area they are still required. You best bet is to ask the AHJ for the correct answer.
In my area they are still required. You best bet is to ask the AHJ for the correct answer.
allenwayne
Senior Member
Re: smoke detectors
Smoke detectors are really not a NEC issue unless they fall under the afci regulation 02 cycle.The final building inspection is where smoke detectors come into play
Smoke detectors are really not a NEC issue unless they fall under the afci regulation 02 cycle.The final building inspection is where smoke detectors come into play
luckyshadow
Senior Member
- Location
- Maryland
Re: smoke detectors
In my area smokes are required in all bedrooms,regardless of the type of dwelling.
Matter of fact the county I live in will require all new houses and apartments to be sprinkled. Starting 1-1-06 This is the third county in Maryland to do this.
In my area smokes are required in all bedrooms,regardless of the type of dwelling.
Matter of fact the county I live in will require all new houses and apartments to be sprinkled. Starting 1-1-06 This is the third county in Maryland to do this.
mdshunk
Senior Member
- Location
- Right here.
Re: smoke detectors
A heck of a lot. Sprinklers are installed with various temperature ratings at which they activate, and are stamped right on the sprinkler. Ones I looked at recently said 160 degrees. I would think you'd have a heck of a lot of smoke beore it got to be 160 degrees at the sprinkler head.
marinesgt0411
Senior Member
- Location
- Naples,FL 34110-9285
Re: smoke detectors
one of the things that I find that are often overlooked is that we as electricians are not just governed by the NEC but also have to concider the firs alarm code,the building code,local fire codes,the NEC is not the only bible
one of the things that I find that are often overlooked is that we as electricians are not just governed by the NEC but also have to concider the firs alarm code,the building code,local fire codes,the NEC is not the only bible
- Location
- Illinois
- Occupation
- retired electrician
Re: smoke detectors
md,
Actually the heat at the ceiling rises very rapidly in the fire room, but in most cases a smoke detector will detect the smoke before sprinkler operates if it is in the fire room. If the smoke detector is not in the same room, it is likely that the sprinkler will control the fire before the smoke detector operates.
Don
md,
Actually the heat at the ceiling rises very rapidly in the fire room, but in most cases a smoke detector will detect the smoke before sprinkler operates if it is in the fire room. If the smoke detector is not in the same room, it is likely that the sprinkler will control the fire before the smoke detector operates.
Don
volt101
Senior Member
- Location
- New Hampshire
Re: smoke detectors
Don,
In most cases you are exactly right. The elevators at NHIS is Loudon NH work on that principle. There are smoke detectors installed at the top and bottom of each elevator shaft and a heat detector is installed w/in 1' of each smoke. The smoke detector tell the elevator that there is a fire and the elevator is recalled to a safe floor. The heat goes off at 195 degrees and activates a shunt trip breaker, thus cutting off all supply power to the elevator shaft. At 205 degrees the sprinkler system soaks the elevator shaft and the car inside of that.
I guess they think that it WILL work this way. I hope so, if not, the shunt trips, occupants are stuck in car, getting wet and hopefully not hot!
Jim
[ July 11, 2005, 10:57 AM: Message edited by: volt101 ]
Don,
In most cases you are exactly right. The elevators at NHIS is Loudon NH work on that principle. There are smoke detectors installed at the top and bottom of each elevator shaft and a heat detector is installed w/in 1' of each smoke. The smoke detector tell the elevator that there is a fire and the elevator is recalled to a safe floor. The heat goes off at 195 degrees and activates a shunt trip breaker, thus cutting off all supply power to the elevator shaft. At 205 degrees the sprinkler system soaks the elevator shaft and the car inside of that.
I guess they think that it WILL work this way. I hope so, if not, the shunt trips, occupants are stuck in car, getting wet and hopefully not hot!
Jim
[ July 11, 2005, 10:57 AM: Message edited by: volt101 ]
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