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May 4, 2003

                             ET NEWS
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        NEWS AND INFORMATION FOR ENGINEERING TECHNICIANS
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Issue No. 97           http://www.etnews.org            5-4-2003
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Contents
--------
- News
- ET Journal
- NICET Test Dates
- AFAA Class Schedule
- Comments & Acknowledgements

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

Web guru Doug Hockinson http://www.metrodenver.org has added a
book store to the ET News web site, where you'll find lots of
reference material for sale. Let me know if you're looking for
something that doesn't appear in the store.

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

I'll see you in Anaheim this week.

Have fun!

Mike
mailto:mbbaker@etnews.org

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

NICET Fire Alarm Systems Level III
36001 OFF-PREMISES TRANSMISSION CIRCUITS
---------------------------------------------

36001 is a Level III Special Work element.

36001 DESCRIPTION
Know the basic characteristics of signaling transmission
technologies and circuits (wire, wireless, fiber optics, etc.)
and how signals are transmitted through each system. Know the
advantages and limitations of each type and where each is
permitted in the codes and standards. (NFPA 70, NFPA 72, Fire
Alarm Signaling Systems) 

36001 REFERENCES:
NFPA 70
http://www.etnews.org/index.php?s=461

NFPA 72
http://www.etnews.org/index.php?s=461

Fire Alarm Signaling Systems 
http://www.etnews.org/index.php?s=461

36001 DESCRIPTION BREAKDOWN:
"Know the basic characteristics of signaling transmission
technologies and circuits (wire, wireless, fiber optics, etc.)
and how signals are transmitted through each system. Know the
advantages and limitations of each type and where each is
permitted in the codes and standards."

Most fire alarm systems are installed using copper conductors
(wires) for transmission of signals as well as providing power to
the devices. Fire alarm systems using copper conductors are to be
installed in accordance with NFPA 70 National Electrical Code.
Copper wires offer many advantages including: easy to terminate;
provides for transmission of power as well as signals; and
comparatively low cost.

It is important to calculate the proper wire size when installing
a fire alarm system. The conductor must be large enough to carry
the assigned load and prevent excessive drop in voltage from the
control panel to the devices.

The main disadvantage with copper conductors is its ability to
pick up electrical transients and interference. Interference can
be generated by lightning strikes, uneven power line conditions,
power line transients, switching system transients, and
interference induced by capacitive/inductive or electromagnetic
coupling to system wiring.

Fiber optics is another method for the transmission of signal in
a fire protection signaling circuit. Fiber optics use a very
small glass fiber to transmit light pulses from one location to
another. The system requires a transmitter and receiver, one at
either end of the fiber to encode and decode the information
on-to and off-of the fiber circuit. These transmitters and
receivers can be an integral part of the equipment or can be
external to the equipment.

An optical fiber consists of:
 o A core (usually glass, sometimes plastic).
 o Cladding (usually glass, sometimes plastic) to keep the light
 within the core.
 o A plastic buffer for protective coating over the cladding.

Fiber size is measured in microns. Optical fiber size is
specified as core diameter/cladding diameter. The most common
size is 62.5/125.

Additionally, there are two fiber types:
 o Multimode that has multiple paths through the fiber.
 o Single-mode that has a single path through the fiber.

Also, the fiber has a specified bandwidth describe in indicating
the amount of information that it can transmit.

The main advantage of fiber optic is its total immunity to
electrical noise. Additionally, high performance fiber optic
systems can be up to 30 miles without repeaters.

A fiber-optic (FO) circuit cannot conduct power from one source
to another and therefore an FO circuit is not used for initiating
device circuits.

Fiber termination is more costly than copper, however, the cost
of fiber and its devices have reduced in cost over the last
several years.

Article 770 of the NEC applies to the installation of fiber
cables and raceway.

A wireless initiating device is any initiating device, which
communicates with associated control/receiving equipment by using
some form of wireless transmission medium.

Wireless transmission is used in local protective signaling
systems between the initiating devices and the control panel.
Dry cell batteries can be used as the sole power source for a
device transmitter under certain conditions (see Element 36002).

Wireless transmission is also used for central station, remote
station, and proprietary systems. The main advantages of wireless
systems are:
1. Ease of installation.
2. Not dependent upon a physical connection for the transmission
of an alarm.

Wireless systems are susceptible to interference from impulse
noise and adjacent channel interference.

Wireless fire alarm system equipment must comply with FCC
regulations and installed in accordance with the NFPA 70.


THE INFORMATION HEREIN IS PROVIDED AS A GUIDE ONLY AND IS
INTENDED TO ASSIST YOU IN PREPARING FOR AN EXAM. IT IS NOT
INTENDED TO BE INCLUSIVE OF ALL INFORMATION THAT MAY BE ON AN
EXAM BUT RATHER IT IS INTENDED TO BE A SMALL SAMPLE OF THE KIND
OF MATERIAL THAT YOU MAY BE EXPECTED TO KNOW.

================================================================
NICET TEST DATES
================================================================

OREGON
------
OR1 PCC Sylvania, Portland;
Test 7/26/03. Postmark deadline 6/7/03.
Test 11/15/03. Postmark deadline 9/27/03.

OR2 Clackamas Community College, Oregon City;
Test 6/21/03. Postmark deadline 5/3/03.
Test 9/27/03. Postmark deadline 8/9/03.

WASHINGTON
----------
WA1 Bates Technical College, Tacoma;
Test 5/17/03. Postmark deadline 3/29/03.
Test 7/26/03. Postmark deadline 6/7/03.

WA2 Walla Walla Community College;
Test 5/17/03. Postmark deadline 3/29/03.
Test 9/27/03. Postmark deadline 8/9/03.

WA3 Spokane Community College;
Test 5/17/03. Postmark deadline 3/29/03.
Test 8/23/03. Postmark deadline 7/7/03.

These dates are from the NICET web site. For a complete list of
all test centers and test dates, visit:
http://63.70.211.210/cfdocs/nicetschedule.cfm

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AFAA CLASS SCHEDULE
================================================================

------------------
May 5-8, 2003 Anaheim, CA - Sponsored by CAFAA
------------------
Fire Alarm System Testing and Inspection Seminar.
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/INT_TI_CAFAA_ANAHEIM_May2003.pdf

------------------
May 6-8, 2003 Chicago, IL
------------------
Advanced Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/ADV_Chicago_May2003.pdf

------------------
May 13-15, 2003 Billings, MT
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_Billings_May2003.pdf

------------------
June 9-12, 2003 Sacramento, CA - Sponsored by CAFAA
------------------
Fire Alarm System Testing and Inspections Seminar.
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/INT_TI_CAFAA_Sacramento_June2003.pdf

------------------
June 10-12, 2003 Alexandria, LA - Sponsored by LA AFAA
------------------
Automatic Fire Detection and Fire Alarm Systems Seminar (Fund.)
Fire Alarm System Testing and Inspections Seminar
http://www.afaa.org/afaa/PDF/AHJ_TI_Alexandria2003.pdf

------------------
June 17-19, 2003 Las Vegas, NV
------------------
Intermediate Fire Alarm Seminar.
http://www.afaa.org/afaa/PDF/IntFA_LasVegas_June2003.pdf

------------------
June 18, 2003 Cincinnati, OH
------------------
Fire Alarm System Testing and Inspections Seminar
http://www.afaa.org/afaa/PDF/TI_Cincinnati2003.pdf

------------------
July 14-17, 2003 Anaheim, CA - Sponsored by CAFAA
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
September 15-18, 2003 Oakland, CA - Sponsored by CAFAA
------------------
Plan Review Seminar
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
September 16-18, 2003 Boston, MA - Sponsored by New England AFAA
------------------
Fire Alarm System Testing and Inspections Seminar
Automatic Fire Detection and Fire Alarm Systems Seminar (Fund.)
More information will be available soon.

------------------
September 22-25, 2003 Lafayette, LA - Sponsored by LA AFAA
------------------
Fire Alarm System Testing and Inspections Seminar
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
October 15-17, 2003 Boston, MA - Sponsored by New England AFAA
------------------
Intermediate Fire Alarm Seminar
More information will be available soon.

------------------
November 3-6, 2003 Anaheim, CA - Sponsored by CAFAA
------------------
Plan Review Seminar
Advanced Fire Alarm Seminar
More information will be available soon.

------------------
November 4-7, 2003 Boston, MA - Sponsored by New England AFAA
------------------
Advanced Fire Alarm Seminar
More information will be available soon.

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

ET News is published weekly and if possible, delivered on Sunday

ET News php/MySQL site by: Doug Hockinson http://metrodenver.org

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 "AFAA is celebrating 50 years!"
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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), and 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.