Archives 2008
Issue No. 322
Issue No. 323
Issue No. 324
Issue No. 325
Issue No. 326
Issue No. 327
Issue No. 328
Issue No. 329
Issue No. 330
Issue No. 331
Issue No. 332
Issue No. 333
Issue No. 334
Issue No. 335
Issue No. 336
Issue No. 337
Issue No. 338
Issue No. 339
Issue No. 340
Issue No. 341
Issue No. 342
Issue No. 343
Issue No. 344
Issue No. 345
Issue No. 346
Issue No. 347
Issue No. 348
Issue No. 349
Issue No. 350
Issue No. 351
Issue No. 352
Issue No. 353
Issue No. 354
Issue No. 355
Issue No. 356
Issue No. 357
Issue No. 358
Issue No. 359
Issue No. 360
Issue No. 361
Issue No. 362
Issue No. 363
Issue No. 364
Issue No. 365
Issue No. 366
Issue No. 367
Issue No. 368
Issue No. 369
Issue No. 370

  Log In

 

May 18, 2008

                             []< ET NEWS                               
====================================================================== 
    NEWS AND INFORMATION FOR THE FIRE PROTECTION ENGINEERING TEAM      
---------------------------------------------------------------------- 
 Issue No. 341  ISSN 1554-074X      http://www.etnews.org   5-18-2008  
====================================================================== 
 
Contents 
-------- 
- News 
- Journal 
- Employment 
- Seminar Schedule 
- Comments & Acknowledgements 
 
====================================================================== 
NEWS
====================================================================== 
 
CPSC announced the recall of 280,000 Carbon Monoxide and Carbon 
Monoxide/Smoke Combo Alarms. The recall indicates that the products 
may not alarm properly posing a hazard. Manufactured in Mexico for 
Maple Chase the alarms were eligible to bear the UL and cUL Listing 
Marks. 
http://www.cpsc.gov/cpscpub/prerel/prhtml08/08267.html 
 
---------------------------------------------------------------------- 
 
Old fire alarm boxes a cash cow?
Hampton Union - Exeter,NH,USA
By Patrick Cronin HAMPTON — Old fire alarm boxes have become quite a 
collector's item selling for several hundred dollars on eBay and 
Hampton selectmen are ... 
http://www.seacoastonline.com/apps/pbcs.dll/article?AID=/20080513/NEWS
/805130359/-1/NEWS10&sfad=1 
 
---------------------------------------------------------------------- 
 
This week I'll see you in Tucson and Phoenix. 
http://www.etnews.org/docs/Alarms_Flyer_08.pdf 
 
Have fun! 
 
Mike 
mailto:mike@etnews.org 
 
DL-38,332 AS-8,036 HA-5,210 F9-642 UA-500 
 
====================================================================== 
                            ADVERTISEMENT                              
====================================================================== 
 CENTRAL STATION MONITORING                   UL(r) listed monitoring  
 All major formats plus AES, SafeCom, ScanAlert, & Video Verification  
  *** 2008 New Dealer Special - 1 YEAR FREE ADDITIONAL SERVICES ***    
 Free Web Access                         mailto://begeord@cuaccess.net 
 503-630-8961 voice || 503-630-8944 fax  http://www.csmul.com          
====================================================================== 
ET NEWS JOURNAL                                                        
====================================================================== 
 
FIRE ALARM WIRING METHODS 
------------------------- 

Today most fire alarm systems are installed using power-limited wiring 
methods. When doing so many people think that they have but one method 
available when in fact they have 3 methods to choose from (references 
are from NFPA 70-2002).

1) Choose from Chapters 1-3.  For example, THHN conductors in EMT 
indoors and THWN in ENT outdoors.  Conductor insulated to 600V and 
conductor size as small as 14AWG, (18AWG and 16AWG with restrictions).
2) Non- power-limited cable NPLF, NPLFR, and NPFLP.  Overall 
insulation of 600V and conductor size as small as 18AWG.
3) Power-limited cable FPL, FPLR, and FPLP.  Overall insulation of 
300V and conductor size as small as 26AWG.

760.52(A) is the thread back to choice numbers 1 and 2.
760.52(B) is choice number 3.

Here's the source material:

760.52 Wiring Methods and Materials on Load Side of the PLFA Power 
Source.
Fire alarm circuits on the load side of the power source shall be 
permitted to be installed using wiring methods and materials in 
accordance with either 760.52(A) or (B).

(A) NPLFA Wiring Methods and Materials.
Installation shall be in accordance with 760.25, and conductors shall 
be solid or stranded copper.
Exception No. 1: The derating factors given in 310.15(B)(2)(a) shall 
not apply.
Exception No. 2: Conductors and multiconductor cables described in and 
installed in accordance with 760.27 and 760.30 shall be permitted.
Exception No. 3: Power-limited circuits shall be permitted to be 
reclassified and installed as non- power-limited circuits if the 
power-limited fire alarm circuit markings required by 760.42 are 
eliminated and the entire circuit is installed using the wiring 
methods and materials in accordance with Part II, Non- Power-Limited 
Fire Alarm Circuits.
FPN: Power-limited circuits reclassified and installed as non- power-
limited circuits are no longer power-limited circuits, regardless of 
the continued connection to a power-limited source. 

(B) PLFA Wiring Methods and Materials.
Power-limited fire alarm conductors and
cables described in 760.71 shall be installed as detailed in 
760.52(B)(1), (2), or (3) of this section. Devices shall be installed 
in accordance with 110.3(B), 300.11(A), and 300.15.

What does this alphabet soup of articles mean? It means that when 
installing power-limited fire alarm components you have 3 choices:

1) Meet the requirements found in 760.52(A), which points to 760.25 
for non- power-limited wiring methods and materials.
For example using 3/4" EMT with THHN 600V copper conductor 14AWG or 
larger wire installed in accordance with appropriate articles of 
Chapter 3 Wiring Methods and Materials. While you may use 16AWG and 
18AWG, using 14AWG or larger allows more choices in jacket insulation 
material.

2) Meet the requirements found within article 760.52(B) for non- power 
limited wiring methods and materials.
For example using NPLF, overall jacketed, 600V copper multiconductor 
18AWG or larger wire fished or concealed, supported at 18" intervals, 
and protected by raceway, building construction, or a solid guard 
within 7' of the floor.

3) Meet the requirements found within article 760.25 for power-limited 
wiring methods and materials For example using FPL, overall jacketed, 
300V copper multiconductor 26AWG or larger wire fished or concealed, 
supported at 18" intervals, and protected by raceway, building 
construction, or a solid guard within 7' of the floor.

In any event you'll see that you must also comply with certain other 
articles, such as:

110.3(B) Allows an 18% volt-drop versus a 3% volt-drop. 
310.11(A) Securely fasten cables to the structure not the ceiling.
300.15 Use a box where required and bushings to protect cables. 
300.22(C) Cables and conductors within metal raceway where located in 
what is referred to as a plenum ceiling.

 
====================================================================== 
                            ADVERTISEMENT                              
====================================================================== 
LIGHT ENGINEERED DISPLAYS, INC.       UL, CSFM and MEA Listed Products 
Graphic and Directory Annunciators    Firefighter Smoke Control Panels 
AquaALERT Water Leak Detection   ARA Systems, Protective Device Covers 
       Complete catalog and specifications available on request        
800-251-2512     -       FAX 800-251-9878       -       www.ledinc.com     
====================================================================== 
JOB OPPORTUNITIES
====================================================================== 
 
Post your announcement at http://www.etnews.org/index.php?s=257 
 
---------------------------------------------------------------------- 
 
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. 
 
====================================================================== 
SEMINAR SCHEDULE
====================================================================== 
 
Contact me to find out how your group can sponsor a seminar. 
mailto:mikebaker@afaa.org 
 
------------------ 
May 20, 2008 Tucson, AZ  
------------------ 
Inspection and Testing of Fire Alarm Systems  
http://www.etnews.org/docs/Alarms_Flyer_08.pdf 
 
------------------ 
May 21, 2008 Phoenix, AZ  
------------------ 
Inspection and Testing of Fire Alarm Systems  
http://www.etnews.org/docs/Alarms_Flyer_08.pdf 
 
------------------ 
May 27-29, 2008 Cincinnati, OH  
------------------ 
Basic Fire Alarm 
Intermediate Fire Alarm (NICET I & II) 
http://www.afaa.org/pdf/BasFA_IntFA_Cincinnati_May2008.pdf 
 
------------------ 
June 9-10, 2008 Cleveland, OH 
------------------ 
Intermediate Fire Alarm Seminar (NICET I & II) 
Sponsored seminar (closed)  
 
------------------ 
June 11-12, 2008 Washington DC 
------------------ 
Intermediate Fire Alarm Seminar (NICET I & II) 
Sponsored seminar (closed)  
 
------------------ 
June 17-19, 2008 Hanford, WA 
------------------ 
Inspection and Testing of Fire Alarm Systems 
Intermediate Fire Alarm Seminar (NICET I & II) 
Sponsored seminar (closed)  
 
------------------ 
June 23-24, 2008 Orlando, FL 
------------------ 
Intermediate Fire Alarm Seminar (NICET I & II) 
Sponsored seminar (closed)  
 
------------------ 
June 25-26, 2008 Atlanta, GA 
------------------ 
Intermediate Fire Alarm Seminar (NICET I & II) 
Sponsored seminar (closed) 
 
------------------ 
July 8-10, 2008 Los Angeles, CA 
------------------ 
Understanding NFPA 101 Fire Alarm Requirements 
Intermediate Fire Alarm Seminar (NICET I & II) 
http://www.afaa.org/pdf/101_IntFA_LosAngeles_Jul2008.pdf 
 
------------------ 
July 14-15, 2008 Newark, NJ 
------------------ 
Intermediate Fire Alarm Seminar (NICET I & II) 
Sponsored seminar (closed) 
 
------------------ 
July 16-17, 2008 Boston, MA
------------------ 
Intermediate Fire Alarm Seminar (NICET I & II) 
Sponsored seminar (closed) 
 
------------------ 
July 22-24, 2008 San Leandro, CA 
------------------ 
Understanding NFPA 101 Fire Alarm Requirements 
Advanced Fire Alarm Seminar (NICET III & IV) 
http://www.afaa.org/pdf/101_AdvFA_SanLeandro_Jul2008.pdf 
 
------------------ 
July 29-31, 2008 Detroit, MI 
------------------ 
Basic Fire Alarm Seminar 
Fire Alarm Plan Review Seminar 
Understanding IBC Fire Alarm Requirements 
http://www.afaa.org/pdf/101_AdvFA_SanLeandro_Jul2008.pdf 
  
====================================================================== 
COMMENTS AND ACKNOWLEDGEMENTS
====================================================================== 

ET News is written nearly every week and almost always sent on Sunday. 

Doug Hockinson built ETNews.org using PHP/MySQL-> http://www.phpvs.com 

Purchase new & used codes & standards on line http://tinyurl.com/36zzk 

---------------------------------------------------------------------- 
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.                                              
====================================================================== 
+--------------------------------------------------------------------+ 
|                   Michael Baker & Associates Inc                   | 
| (800) 734-3902 || PO Box 737, Gladstone OR 97027 || mba@etnews.org | 
+--------------------------------------------------------------------+ 
ET News(SM) Copyright(c) 2008 by Michael B. Baker. All rights reserved 
1,584 subscribers
Send a link to a friend        
 

 

Home - Clients - Book Store - NICET Level I - NICET Level II - NICET Level III - NICET Level IV - Glossary - External Links - Licensing - Photographs - Employment - Disney Crud(SM) - Archives 2001 - Archives 2002 - Archives 2003 - Archives 2004 - Archives 2005 - Archives 2006 - Archives 2007 - Archives 2008 - Archives 2009 - Archives 2010 - Archives 2011 - Archives 2012 - Archives 2013 - Misc

ET NewsSM content copyright © 2017
by Michael B. Baker. All rights reserved.
ISSN 1554-074X

RSS Content
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.