The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Sprinklered equipment 26-008
by twh
Today at 06:28 AM
On Delay Relay with Auto Reset
by Potseal
Yesterday at 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 15
HotLine1 10
Trumpy 8
Texas_Ranger 8
sparkyinak 7
Who's Online
0 registered (), 192 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#171046 - 11/17/07 07:24 PM Fire sprinklers - distance, fire code
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: Chandler, AZ USA
In a commercial Building (a hanger I'm working on) How close can lights or other things be to the sprinkler head? is there a distance below or horizontally? I've heard 18" but it seems like directly below would allow the head to spray out better. Whats the fire code on this?
_________________________
The Golden Rule - "The man with the gold makes the rule"

Top
2014 / 2011 NEC & Related Books and Study Guides
#171128 - 11/20/07 07:28 AM Re: Fire sprinklers - distance, fire code [Re: aldav53]
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: Chandler, AZ USA
I believe it's 18"


Edited by aldav53 (11/20/07 07:29 AM)
Edit Reason: add letter
_________________________
The Golden Rule - "The man with the gold makes the rule"

Top
#171136 - 11/20/07 10:40 AM Re: Fire sprinklers - distance, fire code [Re: aldav53]
earlydean Offline
Member

Registered: 12/22/03
Posts: 749
Loc: Griswold, CT, USA
Per 2002 NFPA 13 (the sprinkler code) Table 8.3.2.5(c), 0-250 W light fixture requires a minimum distance of 6 inches from ordinary-temperature sprinklers, and 3 inches from intermediate-temperature sprinklers. Also, 250-499 W fixtures require a clearance of 12 and 6 inches respectively.

Any fixture within the spray pattern would have to be considered in the design by the engineer or certified installer to allow full coverage despite the obstruction.
_________________________
Earl

Top
#171137 - 11/20/07 10:53 AM Re: Fire sprinklers - distance, fire code [Re: earlydean]
earlydean Offline
Member

Registered: 12/22/03
Posts: 749
Loc: Griswold, CT, USA
The title of Table 8.3.2.5(c) is: Ratings of Sprinklers in Specified Residential Areas. In other than residential situations, 8.3.2.5 requires the sprinkler head temperature rating to be adjusted. Item (6) requires: Sprinklers in unventilated show windows having high-powered electric lights near the ceiling shall be of the intermediate-temperature classification.
To get an answer to your question, you will have to consult the sprinkler engineer or installer.
_________________________
Earl

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals