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January 22, 2012

                             []< ET NEWS                               
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    NEWS AND INFORMATION FOR THE FIRE PROTECTION ENGINEERING TEAM      
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 Issue No. 482  ISSN 1554-074X      http://www.etnews.org   1-22-2012 
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Contents
--------
- News
- Journal
- Employment
- Seminar Schedule
- Comments & Acknowledgements 
 
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NEWS
====================================================================== 
 
Regulation Fire
Construction Week Online
Also known as NFPA - 101, the Fire and Life Safety Code is the first 
standardised piece of legislation to be introduced in the UAE, in fact
in the whole GCC. Its introduction has been warmly welcomed by the 
region's MEP industry professionals as they ... 
http://www.constructionweekonline.com/article-15226-regulation-fire/ 
 
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A History of Accessibility Regulations
GlobeSt.com
... of American Building Officials (COBA) and the latest version of 
the ANSI A117.1 Standard is now part of the ICC's International 
Building Code (IBC). ... 
http://www.globest.com/blogs/buildingsciences/engineering/
Accessibility-Real-Estate-Regulations-317561.html 
 
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Restructuring the fire alarm code
Consulting-Specifying Engineer
Adoption and application of NFPA 72 is typically driven by the model 
building or fire codes (eg, International Building Code, Life Safety 
Code, etc.). ... 
http://www.csemag.com/home/single-article/restructuring-the-fire-alarm
-code/135c8dab6c.html 
 
----------------------------------------------------------------------  
 
Have fun! 
 
- Mike 
 
Foursquare -> http://www.foursquare.com/codewienie 
 
LinkedIn -> http://www.linkedin.com/in/codewienie 
 
Twitter -> http://www.twitter.com/codewienie 
  
====================================================================== 
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====================================================================== 
ET NEWS JOURNAL                                                        
====================================================================== 
 
MINIMUM FIRE ALARM WIRE SIZE 
---------------------------- 

Question:
--------- 
 
Mike,

I know I have seen this on NICET tests, but can't find a 70 or 72 
reference for it, but is there a gauge requirement for Fire Alarm 
cable?  I have been operating on the assumption of 18 for initiating 
and control functions and 14 for NAC.   Have I been making this up in 
my head?
 
Mark Sturgill 
Lexington KY 
 
Answer:
-------
 
Hello Mark,

NFPA 70 requires that wire size be #14 or larger, unless modified 
elsewhere within NFPA 70.  Article 760 references article 110.3(B), 
which essentially says "satisfy the manufacturer."  In order to 
receive listing and labeling from the testing laboratory (i.e. UL and 
FM), among other things the manufacturer is required to design 
equipment that will operate at 85%-110% of nameplate voltage.  This is
also stipulated within NFPA 72.  So, the bottom line is that your 
volt-drop calculations support your choice of wire size to ensure that
the system will operate down to 85% and up to 110% of nameplate 
voltage.
 
Here are the referenced articles:
 
NFPA 70-2005  110.3 Examination, Identification, Installation, and 
Use of Equipment.
(B) Installation and Use. Listed or labeled equipment shall be 
installed and used in accordance with any instructions included in the
listing or labeling.
 
NFPA 70-2005  Table 210.24 Summary of Branch-Circuit Requirements, 
Circuit Rating 15 A, min. size #14
 
NFPA 70-2005  300.1 Scope.  (A) All Wiring Installations. This article
covers wiring methods for all wiring installations unless modified by 
other articles.
 
NFPA 70-2005  760.52 (B) PLFA Wiring Methods and Materials. Power-
limited fire alarm conductors and cables described in 760.82 shall be 
installed as detailed in 760.52(B)(1), (B)(2), or (B)(3) of this 
section. Devices shall be installed in accordance with 110.3(B), 
300.11(A), and 300.15.
 
UL 864-2003  63.2.1 The terminal voltage of a discharged battery ... 
shall not be less than 85% of the marked nominal battery voltage.
 
NFPA 72-2010  10.14 Performance and Limitations.
10.14.1 Voltage, Temperature, and Humidity Variation. Equipment shall 
be designed so that it is capable of performing its intended functions
under the following conditions:
(1)*At 85 percent and at 110 percent of the nameplate primary (main) 
and secondary (standby) input voltage(s)
(2) At ambient temperatures of 0C (32F) and 49C (120F)
(3) At a relative humidity of 85 percent and an ambient temperature of
30C (86F)
 
NFPA 72-2010  12.2.4* The installation of all pathway wiring, cable, 
and equipment shall be in accordance with NFPA 70, National Electrical
Code, and the applicable requirements of 12.2.4.1 through 12.2.4.5.
 
NFPA 72-2010  12.2.4.3* Fire alarm system wiring and equipment, 
including all circuits controlled and powered by the fire alarm 
system, shall be installed in accordance with the requirements of this
Code and of NFPA 70, National Electrical Code, Article 760.
 
Best regards,
 
Mike
 
====================================================================== 
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====================================================================== 
JOB OPPORTUNITIES
====================================================================== 
 
JOB OPPORTUNITY and SEEKING EMPLOYMENT announcements are provided as a 
service.  ET News provides a venue for direct contact between job 
seekers and employers.  ET News is not a placement agency and does not 
endorse either job seekers or employers. 
  
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Post your announcement at http://www.etnews.org/index.php?s=257 
  
====================================================================== 
SEMINAR SCHEDULE
====================================================================== 
 
Contact me regarding seminar sponsorship -> mailto:mikebaker@afaa.org 
 
Download our course outlines here -> http://tinyurl.com/4xfydyk   
 
Download seminar sponsorship information -> http://tinyurl.com/3w8hgbv 
 
 
------------------ 
February 28-29 and March 1, 2012 - State College, PA   
------------------ 
Fire Alarm Plan Review 
Intermediate Fire Alarm (NICET I & II Test Preparation) 
Sponsored seminar (closed)  
  
------------------ 
March 19-23, 2012 - Laurel, MD  
------------------ 
More info to follow ... 
 
------------------ 
March 26-30, 2012 - Lexington, KY 
------------------ 
More info to follow ... 
 
====================================================================== 
COMMENTS AND ACKNOWLEDGEMENTS 
====================================================================== 
 
Doug Hockinson built ETNews.org using PHP & MySQL http://www.phpvs.com. 
 
ET News is written nearly every week and almost always sent on Sunday. 
 
---------------------------------------------------------------------- 
Some information may be found in this message and etnews.org that is   
reprinted with permission from one or more of the following; NFPA 70   
National Electrical Code(r), NFPA 72(r) National Fire Alarm Code(r),   
NFPA 101(r) Life Safety Code(r), Copyright(c) NFPA, Quincy, MA 02269   
This reprinted material is not the complete and official position of   
the NFPA on the referenced subject, which is represented only by the   
standard in its entirety.                                              
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Some information may be found within this web site that is reprinted with permission from one or more of the following: NFPA 70 National Electrical Code®,NFPA 72® National Fire Alarm Code®, & NFPA 101® Life Safety Code®, Copyright© NFPA, Quincy, MA 02269.

This reprinted material is not the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its entirety.