ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Calling all Non-US members!! (Non-US only)
by HotLine1. 06/13/18 01:50 PM
GE Lighting Recalls LED Tube Lamps
by Admin. 06/12/18 09:32 PM
Ketra Recalls Recessed Downlights
by Admin. 06/12/18 09:17 PM
diazed fuses
by Texas_Ranger. 06/11/18 07:31 AM
soda can fuse from UK, facebook
by wa2ise. 06/06/18 11:02 PM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
0 registered members (), 22 guests, and 22 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
"Requirements for smoke detectors" #205291
02/09/12 01:05 PM
02/09/12 01:05 PM
S
sparkync  Offline OP
Member
Joined: Oct 2002
Posts: 830
NC
For those in North Carolina, where do I find the details about adding smoke detectors inside and outside bedrooms?
I think it's in the NC Fire Code somewhere, but not sure.
I have a situation where there is a bedroom addition being built on a house. The bedroom will have 2 entrances from the old part of the house. I'm not sure which end of the bedroom to place the smoke detectors. Normally I know to place a smoke detector in the hallway outside of the bedrooms, then have one inside each bedroom, wired with 3 wire so that all come on at one time, but this layout is a little different from the norm. One of the entrances go into another existing bedroom, and the other entrance goes into a covered enclosed porch area. Also, here we have to wire for a carbon monoxide detector when an addition is added. Thanks, I'll still be looking. Just want to know the details. Steve..

2017 / 2014 NEC & Related Books and Study Guides
Re: "Requirements for smoke detectors" [Re: sparkync] #205301
02/09/12 05:36 PM
02/09/12 05:36 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,227
Estero,Fl,usa
Is the enclosed porch area now part of the HVAC building envelope?
(what we call under air). If so I would put the second smoke there. If it is actually still "outside" you probably only need one smoke in the bedroom since the next room is another bedroom with a smoke.

When in doubt, show the floor plan to the AHJ and ask him.


Greg Fretwell
Re: "Requirements for smoke detectors" [Re: sparkync] #205304
02/09/12 08:34 PM
02/09/12 08:34 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,973
Brick, NJ USA
Best advice is as above from Greg, find your local fire AHJ, and go over the floor plan with him.

Basic understanding IMHO, is one in ea BR, one in hallway outside BRs, and a CO on each level. Interconnected, 120 volt, w/BBU. 'Code' is within the adopted NFPA Fire Code.


John
Re: "Requirements for smoke detectors" [Re: sparkync] #205309
02/09/12 10:32 PM
02/09/12 10:32 PM
S
sparkync  Offline OP
Member
Joined: Oct 2002
Posts: 830
NC
Found it in NFPA 13.7.7.14.2 thru.....14.7 WOW!! and I thought the electrical code could be confusing. What numbers:)
Anyway according to how I read it I can put a hard wired smoke detector in the new bedroom just inside one of the entrances, and a battery smoke detector in the existing part outside the bedroom, though if possible, I may run wire to the existing part if it is accessible. The carbon monoxide detector is right outside the sleeping area, which in my case it looks like I can use a smoke/carbon monoxide combo to meet this requirement. Thanks again...

Re: "Requirements for smoke detectors" [Re: sparkync] #205310
02/09/12 11:26 PM
02/09/12 11:26 PM
P
pdh  Offline
Member
Joined: Jan 2005
Posts: 354
My father's smoke detectors appear to be wired as part of the security alarm system. Trouble is, that security alarm system is defective. It kills the battery they use in less than 10 months. I suspect it is not charging it properly. The security system board was replaced twice and the problem persists and they want to charge him more to keep repairing it, now. Since he feels he doesn't need the security alarm (located in a rural part of the county) he simply stopped subscribing to the security service. Now the alarm system is simply dead and none of the smoke detectors work (they did work when a new battery was put in). The current board doesn't even work at all. So basically he has no smoke detectors.

Is this the right way for smoke detectors to be installed today? His was done in 2000. I think he needs to get ones that operate from smaller batteries like 9V just to be safe, even though as I understand it, they are supposed to be hardwired now (but I'm asking if doing it via an alarm system is right).

I'm wondering if they would work if I just supplied 12VDC at the correct polarity on the line to the detectors.

Re: "Requirements for smoke detectors" [Re: sparkync] #205313
02/10/12 12:01 AM
02/10/12 12:01 AM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,973
Brick, NJ USA
I can tell you that in NJ the low voltage smokes/heat/CO detectors with the security system are considered secondary. 120 volt, interconnected, w/battery BU are required, and have been for a long,long time.

Reasoning by state is about exactly what yoy describe; lack of monitoring/service contract + no smokes.

Personally, the secondary LV smokes are a real good item to have (monitored) to notify the fire dept.



John
Re: "Requirements for smoke detectors" [Re: sparkync] #205314
02/10/12 12:03 AM
02/10/12 12:03 AM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,973
Brick, NJ USA
I can tell you that in NJ the low voltage smokes/heat/CO detectors with the security system are considered secondary. 120 volt, interconnected, w/battery BU are required, and have been for a long,long time.

Reasoning by state is about exactly what yoy describe; lack of monitoring/service contract + no smokes.

Personally, the secondary LV smokes are a real good item to have (monitored) to notify the fire dept.



John

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Grover
Grover
Sebago, ME, USA
Posts: 109
Joined: January 2005
Show All Member Profiles 
Top Posters(30 Days)
twh 5
Popular Topics(Views)
247,613 Are you busy
184,957 Re: Forum
174,197 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.020s Queries: 15 (0.004s) Memory: 0.9883 MB (Peak: 1.1431 MB) Zlib enabled. Server Time: 2018-06-20 13:03:42 UTC