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January 18, 2004

                             ET NEWS 
======================================================================
        NEWS AND INFORMATION FOR ENGINEERING TECHNICIANS
----------------------------------------------------------------------
Issue No. 134 || http://etnews.org mailto:mike@etnews.org || 1-18-2004
======================================================================

Contents
--------
- News
- ET Journal
- Job Opportunities
- Fire Alarm Class Schedule
- Comments & Acknowledgements

======================================================================
NEWS 
======================================================================

FALSE fire alarm rules get tougher
St. Petersburg Times, FL
... In 880 Mandalay's case, at the request of the fire department, the owners
recently finished installing a new alarm system, Gray said. ...


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GIRL Arrested For Allegedly Pulling Fire Alarm
Firehouse.com News
DAYTON, Ohio -- A girl at a local treatment facility is arrested accused of
pulling a fire alarm. Officers were called to the Eastway ...


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HOOVER wants court to dismiss City Hall fire alarm case
Fitchburg Sentinel, MA
... Businessman Jack Hoover, acting as his own lawyer, plans to ask a judge to
dismiss a criminal charge against him for illegally pulling a fire alarm at ...


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FIRE OFFICIALS READY TO ENFORCE NEW CODE
Westerly Sun, RI
... Places of assembly without the required fire alarm systems will see maximum
occupancy cut by 10 percent beginning in July. Occupancy ...


----------------------------------------------------------------------

I'll see you in Albuquerque this week.


Have fun!

Mike


======================================================================
ET JOURNAL 
======================================================================

NFPA 70 ARTICLE 760 PART II
---------------------------

LAST WEEK WE REVIEWED NFPA 70-2002 ARTICLE 760 PART I, WHICH APPLY TO ALL FIRE
ALARM INSTALLATIONS. THIS WEEK WE COVER PART II, WHICH APPLY TO ALL NON-POWER-
LIMITED FIRE ALARM SYSTEMS (NPLFA).

II. NonPower-Limited Fire Alarm (NPLFA) Circuits
760.21 NPLFA Circuit Power Source Requirements ... shall comply with Chapters 1
through 4, and the output voltage shall not be more than 600 volts and shall not
be supplied through ground-fault circuit interrupters.

760.23 NPLFA Circuit Overcurrent Protection ... for conductors 14 AWG and larger
shall be provided in accordance with the conductor ampacity without applying the
derating factors of 310.15 to the ampacity calculation. Overcurrent protection
shall not exceed 7 amperes for 18 AWG conductors and 10 amperes for 16 AWG
conductors.

760.24 NPLFA Circuit Overcurrent Device Location ... at the point where the
conductor to be protected receives its supply.

760.25 NPLFA Circuit Wiring Methods shall be in accordance with 110.3(B),
300.11(A), 300.15, 300.17, and other appropriate articles of Chapter 3.
    
    110.3(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 72 REQUIRES NAMEPLATE DATA TO BE PROVIDED ON DEVICES THAT INCLUDE
ELECTRICAL REQUIREMENTS. THIS NAMEPLATE DATA IS WHERE MAXIMUM VOLT-DROP
REQUIREMENTS ARE ESTABLISHED.

    300.11(A) Secured in Place ... raceways, boxes, and fittings shall be
    securely fastened in place. Where independent support wires are used, they
    shall be secured at both ends. Cables and raceways shall not be supported by
    ceiling grids.
    
    300.15 Boxes, Conduit Bodies, or Fittings  Where Required ...

    300.17 Number and Size of Conductors in Raceway ... shall not be more than
    will permit dissipation of the heat and ready installation or withdrawal of
    the conductors without damage to the conductors or to their insulation.

760.26 Conductors of Different Circuits in Same Cable, Enclosure, or Raceway.
(A) Class 1 with NPLFA Circuits ... are permitted to occupy the same cable,
enclosure, or raceway without regard to whether the individual circuits are
alternating current or direct current, provided all conductors are insulated
for the maximum voltage of any conductor in the enclosure or raceway.
(B) Fire Alarm with Power-Supply Circuits ... are permitted in the same cable,
enclosure, or raceway only where connected to the same equipment.

760.27 NPLFA Circuit Conductors.
(A) Only copper conductors shall be permitted for fire alarm systems ...18 AWG
and 16 AWG are permitted, provided they comply with Table 402.5 and installed in
a raceway, enclosure, or listed cable. Conductors larger than 16 AWG shall not
supply loads greater than the ampacities given in 310.15, as applicable.
(B) Insulation ... on conductors shall be suitable for 600 volts. Conductors
larger than 16 AWG shall comply with Article 310. Conductors 18 AWG and 16 AWG
shall be Type KF-2, KFF-2, PAFF, PTFF, PF, PFF, PGF, PGFF, RFH-2, RFHH-2,
RFHH-3, SF-2, SFF-2, TF, TFF, TFN, TFFN, ZF, or ZFF. Conductors with other types
and thickness of insulation shall be permitted if listed for nonpower-limited
fire alarm circuit use.
(C) Conductor Materials. Conductors shall be solid or stranded copper.

SOLID OR STRANDED COPPER ONLY ... NOT THAT OTHER KIND OF COPPER!?

760.28 Number of Conductors in Cable Trays and Raceways, and Derating.
(A) Where only NPLFA circuit and Class 1 circuit conductors are in a raceway,
the number of conductors shall be determined in accordance with 300.17. The
derating factors given in 310.15(B)(2)(a) shall apply if such conductors carry
continuous load in excess of 10 percent of the ampacity of each conductor. 
(B) Where power-supply conductors and fire alarm circuit conductors are
permitted in a raceway in accordance with 760.26, the number of conductors shall
be determined in accordance with 300.17. The derating factors given in
310.15(B)(2)(a) shall apply as follows:
  (1) To all conductors where the fire alarm circuit conductors carry continuous
  loads in excess of 10 percent of the ampacity of each conductor and where the
  total number of conductors is more than three
  (2) To the power-supply conductors only, where the fire alarm circuit
  conductors do not carry continuous loads in excess of 10 percent of the
  ampacity of each conductor and where the number of power-supply conductors is
  more than three
(C) Where fire alarm circuit conductors are installed in cable trays, they shall
comply with 392.9 through 392.11. 

THE NEXT ARTICLE, 760.30, DESCRIBES ANOTHER ALTERNATIVE TO THE CIRCUIT
CONDUCTORS THAT WERE JUST DESCRIBED. THESE MULTICONDUCTOR NPLFA CABLES LOOK LIKE
TRADITIONAL POWER-LIMITED CIRCUIT CONDUCTORS BUT THEY ARE NOT.

760.30 Multiconductor NPLFA Cables are permitted to be used on fire alarm
circuits operating at 150 volts or less and shall be installed in accordance
with 760.30(A) and (B).
(A) Multiconductor NPLFA circuit cables shall be installed in accordance with:
  (1) In raceway or exposed on surface of ceiling and sidewalls or fished in
  concealed spaces. Splices or terminations made in listed boxes or fire alarm
  devices. Exposed cables shall be adequately supported and installed to provide
  maximum protection against physical damage through building construction.
  Where located within 7 ft of the floor, cables shall be securely fastened in
  an approved manner at intervals of not more than 18 in.
  (2) In metal raceway or rigid nonmetallic conduit where passing through a
  floor or wall to a height of 7 ft above the floor unless protected by building
  construction or a solid guard.
  (3) In rigid metal conduit, rigid nonmetallic conduit, IMC, liquidtight
  flexible NM tubing, or EMT in hoistways.
(B) Applications of Listed NPLFA Cables:
  (1) Multiconductor NPLFA circuit cables, Types NPLFP, NPLFR, and NPLF, shall
  not be installed exposed in ducts or plenums.
  (2) Cables installed in other spaces used for environmental air shall be Type
  NPLFP.
  (3) Cables installed in vertical runs and penetrating more than one floor
  shall be Type NPLFR.
  (4) Cables installed in building locations other than these locations shall be
  Type NPLF.

760.31 Listing and Marking of NPLFA Cables.
(A) Conductors shall be 18 AWG or larger solid or stranded copper.
(B) Insulated conductors shall be suitable for 600 volts ... 14 AWG and larger
shall be one of the types listed in Table 310.13 ... 18 AWG and 16 AWG shall be
in accordance with 760.27.
(C) NPLFP shall be listed as being suitable for use in other space used for
environmental air.
(D) NPLFR shall be listed as being suitable for use in a vertical run in a shaft
or from floor to floor.
(E) NPLF shall be listed as being suitable for general-purpose fire alarm use,
with the exception of risers, ducts, plenums, and other space used for
environmental air.
(F) Cables suitable for use in fire alarm systems to ensure survivability of
critical circuits during a specified time under fire conditions shall be listed
as circuit integrity (CI) cable.

SURVIVABILITY REQUIREMENTS ARE INVOKED BY NFPA 72 WHERE EVAC SERVICE IS
REQUIRED.

(G) Multiconductor NPLFA cables shall be marked and are permitted to be marked
with a maximum usage voltage rating of 150 volts. PLFA Cable Markings

NEXT WEEK WE'LL REVIEW ARTICLE 760 PART III, POWER-LIMITED (PLFA) WIRING METHODS
AND MATERIALS.

======================================================================
JOB OPPORTUNITIES 
======================================================================

If you have a job opportunity or are seeking employment, I'll place your ad here
once for free. If you're looking for more exposure, I'll place your ad on the
web site  for a reasonable fee.

======================================================================
FIRE ALARM CLASS SCHEDULE 
======================================================================

------------------
January 20-22, 2004 Albuquerque, NM
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II)


------------------
January 27-29, 2004 Portland, OR - Sponsored by Oregon AFAA
------------------
Plan Review Seminar 
Advanced Fire Alarm Seminar (NICET III/IV)


------------------
February 10-12, 2004 Dallas, TX - Co-sponsored by TFAA
------------------
Plan Review Seminar 
Intermediate Fire Alarm Seminar (NICET I/II) 


------------------
February 24-26, 2004 St. Louis, MO
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II) 


------------------
March 10-11, 2004 Wichita, KS - Sponsored by KS AFAA
------------------
Plan Review Seminar 
Inspection, Testing, and Maintenance of Fire Alarm Systems


------------------
March 16-18, 2004 Chicago, IL
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II)


------------------
March 23-25, 2004 Baton Rouge, LA
------------------
Plan Review Seminar
Advanced Fire Alarm Seminar (NICET III/IV)
More information is forthcoming.

------------------
April 13-14, 2004 Charleston, SC
------------------
Plan Review Seminar
Inspection, Testing, and Maintenance of Fire Alarm Systems
More information is forthcoming.

------------------
May 11-13, 2004 Cleveland, OH
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II)
More information is forthcoming.

------------------
May 18-20, 2004 Newark, NJ
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II)
More information is forthcoming.

------------------
June 8-10, 2004 Kansas City, MO
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II)
More information is forthcoming.

------------------
June 15-17, 2004 Des Moines, IA
------------------
Fire Alarm System Fundamentals
Inspection, Testing, and Maintenance of Fire Alarm Systems
Plan Review Seminar
More information is forthcoming.

------------------
July 6-8, 2004 Seattle, WA
------------------
Inspection, Testing, and Maintenance of Fire Alarm Systems
Intermediate Fire Alarm Seminar (NICET I/II)
More information is forthcoming.

------------------
July 13-14, 2004 Chicago, IL
------------------
Advanced Fire Alarm Seminar (NICET III/IV)
More information is forthcoming.

------------------
July 20-22, 2004 Salt Lake City, UT
------------------
Inspection, Testing, and Maintenance of Fire Alarm Systems
Intermediate Fire Alarm Seminar (NICET I/II)
More information is forthcoming.

======================================================================
COMMENTS AND ACKNOWLEDGEMENTS 
======================================================================

ET News is published weekly and almost always delivered on Sunday

ET News php/MySQL web site by Doug Hockinson 

Engineering Technician info 

The NICET acronym found herein refers to  
NATIONAL INSTITUTE FOR CERTIFICATION IN ENGINEERING TECHNOLOGIES

The AFAA acronym found herein refers to  
AUTOMATIC FIRE ALARM ASSOCIATION "Join us in Charleston!"
----------------------------------------------------------------------
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Code(r), NFPA 72 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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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.