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January 25, 2004

                             ET NEWS 
======================================================================
        NEWS AND INFORMATION FOR ENGINEERING TECHNICIANS
----------------------------------------------------------------------
Issue No. 135   http://etnews.org   mailto:mike@etnews.org   1-25-2004
======================================================================

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

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

This year's AFAA annual meeting is in Charleston, SC

April 14 - Annual Golf Tournament
April 15 - Board of Directors Meeting
April 16-17 - Annual Meeting

This year's theme is "Doing the Right Thing".

Join us in Charleston!

Visit http://www.afaa.org for more information.

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

'FAULTY' alarm in blaze tragedy
icBirmingham
A fire alarm at a council house where two young children died in a horrific
blaze may have been wrongly fitted by city council workmen an inquest has been
told ...
http://icbirmingham.icnetwork.co.uk/0100news/0100localnews/content_objectid=1385
3209_method=full_siteid=50002_headline=--Faulty--alarm-in-blaze-tragedy-name_pag
e.html

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

FIRE alarm provokes officials to consider a policy change
Edina Sun Current
A fire alarm that activated almost two weeks ago at an Edina movie theater is
causing fire officials to reexamine emergency procedures for large-occupancy ...
http://www.mnsun.com/story.asp?city=Edina&story=127899

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

I'll see you in Brooks, OR this week.
http://www.afaa.org/afaa/PDF/PR_ADV_Portland_Jan2004.pdf

Have fun!

Mike
mailto:mike@etnews.org

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

NFPA 70 ARTICLE 760 PART III
----------------------------

III. Power-Limited Fire Alarm (PLFA) Circuits
760.41 Power Sources for PLFA Circuits ... shall be ...
(A) A listed PLFA or Class 3 transformer.
(B) A listed PLFA or Class 3 power supply.
(C) Listed equipment marked to identify the PLFA power source.
FPN: See Tables 12(a) and 12(b) for power limitations.

760.42 ... equipment shall be marked to indicate each circuit that is a power-
limited fire alarm circuit.

760.51 ... conductors and equipment on the supply side of the power source shall
be installed in accordance with the appropriate requirements of Part II and
Chapters 1 through 4. Transformers or other devices supplied from power-supply
conductors shall be protected by an overcurrent device rated not over 20 amperes.

760.52 ... fire alarm circuits on the load side of the power source are
permitted to be installed using wiring methods and materials in accordance with
either 760.52(A) or (B).
(A) Installation shall be in accordance with 760.25, solid or stranded copper
conductors.
    [760.25 NPLFA Circuit Wiring Methods.]

(B) PLFA conductors and cables shall be installed IAW 110.3(B), 300.11(A), and
300.15.
   
    [110.3(B) Listed or labeled equipment installed in accordance with
		instructions included in the listing or labeling.]
    [300.11(A) ... raceways, boxes, and fittings securely fastened in place ...
		not supported by ceiling grids.]
    [300.15 ... Boxes, Conduit Bodies, or Fittings  Where Required ...]

(1) In raceway or exposed on the surface of ceiling and sidewalls or fished in
concealed spaces ... splices or terminations in listed boxes or fire alarm
devices. Where exposed, cables supported to protect against physical damage
using building construction. Where located within 7 ft of the floor, securely
fastened in an approved manner at intervals of not more than 18 in.
(2) In metal raceway or rigid NM conduit where passing through a floor or wall
to a height of 7 ft above the floor or protected using building construction
such or a solid guard.
(3) In rigid metal conduit, rigid NM conduit, IMC, or EMT where installed in
hoistways.

760.55 (A) PLFA circuit cables and conductors shall not be commingled with
conductors of electric light, power, Class 1, nonpower-limited fire alarm
circuits, and medium power network-powered broadband communications circuits
unless ...
(B) PLFA cables are permitted together with Class 1, NPLFA, and medium power
network-powered broadband communications circuits where they are separated by a
barrier.
(C) In enclosures, PLFA circuits are permitted in a raceway within the enclosure
to separate them from Class 1, nonpower-limited fire alarm, and medium power
network-powered broadband communications circuits.
(D) PLFA conductors in enclosures are permitted to be installed with electric
light, power, Class 1, nonpower-limited fire alarm, and medium power network-
powered broadband communications circuits where they are introduced solely to
connect the equipment connected to power-limited fire alarm circuits, and comply
with either of the following conditions:  
  (1) PLFA circuits are separated by at least 1/4" distance from electric light,
       power, Class 1, NPLFA, and medium power network-powered broadband
       communications circuit conductors.
  (2) The circuit conductors operate at 150 volts or less to ground and also
	comply with one of the following:  
    a. PLFA circuits are installed using FPL, FPLR, FPLP, and conductors
        extending beyond the jacket are separated by a minimum of 0.25 in. or by a
        nonconductive sleeve or nonconductive barrier from all other conductors.
    b. PLFA circuit conductors are installed as nonpower-limited circuits in
        accordance with 760.25.
(E) PLFA circuit conductors entering boxes are permitted with electric light,
power, Class 1, NPLFA, and medium power network-powered broadband communications
circuits where they are introduced solely to connect the equipment connected to
PLFA circuits or to other circuits controlled by the fire alarm system to which
the other conductors in the enclosure are connected. Where PLFA circuit
conductors must enter an enclosure that is provided with a single opening, they
shall be permitted to enter through a single fitting (such as a tee), provided
the conductors are separated from the conductors of the other circuits by a
continuous and firmly fixed nonconductor, such as flexible tubing.
(F) In hoistways, PLFA circuit conductors shall be installed in rigid metal
conduit, rigid NM conduit, IMC, liquidtight flexible nonmetallic conduit, or
EMT. For elevators or similar equipment, these conductors shall be permitted to
be installed as provided in 620.21.

    [620.21(A)1(b) Wiring Methods ... in elevator hoistways ... Cables used in
    Class 2 power-limited circuits shall be permitted to be installed between
    risers and signal equipment and operating devices, provided the cables are
    supported and protected from physical damage and are of a jacketed and
    flame-retardant type.]

(G) For other applications, PLFA circuit conductors shall be separated by at
least 2 in. from conductors of any electric light, power, Class 1, NPLFA, or
medium power network-powered broadband communications circuits unless one of the
following conditions is met:  
  (1) Either;
    (a) all of the electric light, power, Class 1, NPLFA, and medium power
    network-powered broadband communications circuit conductors or;
    (b) all of the PLFA circuit conductors are in a raceway or in metal-
    sheathed, metal-clad, NM, or Type UF cables.
  (2) All of the electric light, power, Class 1, NPLFA, and medium power
  network-powered broadband communications circuit conductors are permanently
  separated from all of the PLFA circuit conductors by a continuous and firmly
  fixed nonconductor, such as porcelain tubes or flexible tubing, in addition to
  the insulation on the conductors. 

760.56 Installation of Conductors of Different PLFA Circuits, Class 2, Class 3,
and Communications Circuits in the Same Cable, Enclosure, or Raceway.
(A) Cable and conductors of two or more PLFA circuits, communications circuits,
or Class 3 circuits are permitted within the same cable, enclosure, or raceway.
(B) Conductors of one or more Class 2 circuits are permitted within the same
cable, enclosure, or raceway with conductors of PLFA circuits, provided that the
insulation of the Class 2 circuit conductors in the cable, enclosure, or raceway
is at least that required by the power-limited fire alarm circuits.
(C) Low-power network-powered broadband communications circuits shall be
permitted in the same enclosure or raceway with PLFA cables.

760.57 PLFA circuit conductors shall not be strapped, taped, or attached by any
means to the exterior of any conduit or other raceway as a means of support.

760.58 Conductors of 26 AWG are permitted only where spliced with a connector
listed as suitable for 26 AWG to 24 AWG or larger conductors that are terminated
on equipment or where the 26 AWG conductors are terminated on equipment listed
as suitable for 26 AWG conductors. Single conductors shall not be smaller than
18 AWG.

760.59 Current-Carrying Continuous Line-Type Fire Detectors.
(A) Listed continuous line-type fire detectors are permitted to be used in
power-limited circuits.
(B) Continuous line-type fire detectors shall be installed in accordance with
760.42 through 760.52 and 760.54.

760.61 PLFA cables shall comply with ...
(A) Cables installed in ducts, plenums, and other spaces used for environmental
air shall be Type FPLP. Abandoned cables are not permitted to remain. Types
FPLP, FPLR, and FPL cables installed in compliance with 300.22 are permitted.
(B) Cables installed in risers shall be as described in either (1), (2), or (3):  
  (1) Cables installed in vertical runs and penetrating more than one floor, or
  cables installed in vertical runs in a shaft, shall be Type FPLR. Floor
  penetrations requiring Type FPLR shall contain only cables suitable for riser
  or plenum use. Abandoned cables shall are not permitted to remain.
  (2) Other cables shall be installed in metal raceways or located in a
  fireproof shaft having firestops at each floor.
  (3) Type FPL cable are permitted in one- and two-family dwellings.
(C) Cables installed in building locations other than those covered in 760.61(A)
or (B) shall be ...  
  (1) Type FPL is permitted.
  (2) Cables are permitted to be installed in raceways. 
  (3) Cables specified in Chapter 3 and meeting the requirements of 760.71(A)
  and (B) are permitted in nonconcealed spaces where the exposed length of cable
  does not 10 ft.
  (4) A portable fire alarm system provided to protect a stage or set when not
  in use shall be permitted to use wiring methods in accordance with 530.12. 
(D) The uses and permitted substitutions for fire alarm cables listed in Table
760.61 is permitted.

760.71 Type FPL cables installed as wiring within buildings shall be listed as
being resistant to the spread of fire and other criteria in accordance with
760.71(A) through (H) and shall be marked in accordance with 760.71(I).
Insulated continuous line-type fire detectors shall be listed in accordance with
760.71(J).
(A) Conductors shall be solid or stranded copper.
(B) The size of conductors in a multiconductor cable shall not be smaller than
26 AWG. Single conductors shall not be smaller than 18 AWG.
(C) The cable shall have a voltage rating of not less than 300 volts.
(D) Type FPLP power-limited fire alarm plenum cable shall be listed as being
suitable for use in ducts, plenums, and other space used for environmental air
and listed as having adequate fire-resistant and low smoke-producing
characteristics. 
(E) Type FPLR power-limited fire alarm riser cable shall be listed as being
suitable for use in a vertical run in a shaft or from floor to floor and listed
as having fire-resistant characteristics capable of preventing the carrying of
fire from floor to floor. 
(F) Type FPL power-limited fire alarm cable shall be listed as being suitable
for general-purpose fire alarm use, except in risers, ducts, plenums, and other
spaces used for environmental air and listed as being resistant to the spread of
fire.
(G) 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.
(H) Coaxial cables are permitted to use 30 percent conductivity copper-covered
steel center conductor wire and listed as Type FPLP, FPLR, or FPL cable.
(I)  The cable shall be marked in accordance with Table 760.71(I). The voltage
rating shall not be marked on the cable. Cables that are listed for circuit
integrity shall be identified with the suffix CI as defined in 760.71(G).
(J) Insulated continuous line-type fire detectors shall be listed as being
resistant to the spread of fire, marked, and the jacket compound shall have a
high degree of abrasion resistance.

NEXT WEEK I'LL *TRY* TO SUMMARIZE FIRE ALARM WIRING METHODS AND MATERIALS.

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

Seeking Technicians with a Washington 06 Limited Energy Electrician Certificate.
Qualified persons contact Dean Reed mailto:bubba@oz.net

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

SEEKING EMPLOYMENT
------------------
I am an experienced Factory Trained and NICET II certified and FAL Life Safety/
Fire Alarm Technician. I am currently employed as a Service Mgr, but am still
actively working as a technician as well. I am seeking employment in an
environment where I will learn more every day. Looking for full time or contract
work in north texas.

DARRELL W. DIXON, JR.
600 North Dick Price Rd.
Kennedale, TX. 76060
Phone: (817) 483-3706
mailto:HD1972XLH@aol.com

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

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 http://www.etnews.org/index.php?s=257 for a reasonable fee.

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

------------------
January 27-29, 2004 Portland, OR - Sponsored by Oregon AFAA
------------------
Plan Review Seminar 
Advanced Fire Alarm Seminar (NICET III/IV)
http://www.afaa.org/afaa/PDF/PR_ADV_Portland_Jan2004.pdf

------------------
February 10-12, 2004 Dallas, TX - Co-sponsored by TFAA
------------------
Plan Review Seminar 
Intermediate Fire Alarm Seminar (NICET I/II) 
http://www.afaa.org/afaa/PDF/PR_IntFA_Dallas_Feb2004.pdf

------------------
February 24-26, 2004 St. Louis, MO
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II) 
http://www.afaa.org/afaa/PDF/PR_IntFA_StLouis_Jan2004.pdf

------------------
February 26, 2004 Boca Raton, FL 
------------------
Plan Review Seminar
More information will be available soon!

------------------
March 10-12, 2004 Minneapolis, MN - Sponsored by MN AFAA
------------------
Plan Review Seminar 
Intermediate Fire Alarm Seminar (NICET I/II)
More information will be available soon! 

------------------
March 10-11, 2004 Wichita, KS - Sponsored by KS AFAA
------------------
Plan Review Seminar 
Inspection, Testing, and Maintenance of Fire Alarm Systems
http://www.afaa.org/afaa/PDF/PR_TI_KSAFAA_Mar2004.pdf

------------------
March 16-18, 2004 Chicago, IL
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar (NICET I/II)
http://www.afaa.org/afaa/PDF/PR_IntFA_Chicago_Mar2004.pdf

------------------
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
http://www.afaa.org/afaa/PDF/PR_TI_Charleston_Apr2004.pdf

------------------
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 http://phpvs.com

Engineering Technician info http://www.bls.gov/oco/ocos112.htm

The NICET acronym found herein refers to http://www.nicet.org
NATIONAL INSTITUTE FOR CERTIFICATION IN ENGINEERING TECHNOLOGIES

The AFAA acronym found herein refers to http://www.afaa.org
AUTOMATIC FIRE ALARM ASSOCIATION "Join us in Charleston!"
----------------------------------------------------------------------
Some information may be found within this email message that is reprinted with
permission from one or more of the following; NFPA 70 National Electrical
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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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.