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September 16, 2001

                   Northwest NICET Newsletter 
================================================================
Volume 1 Issue 12                                      9-16-2001
================================================================

        News for Fire Protection Engineering Technicians
        ------------------------------------------------

Contents:
---------
- News
- Tech Stuff
- Test Dates
- Class Schedule
- Administrivia

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

I delivered my #3 son Adrian to the airport last Friday (9/7) and said
farewell; he's moving to Newark, NJ. When the horrific events began to
unfold from NY, my heart sank until he checked in with us later to let
us know he was ok. I can barely imagine what other families are going
through right now as they cope with the unthinkable.

I for one am ready to re-enlist.

================================================================
TECH STUFF
================================================================

Basic Electricity
-----------------

This is project 1 of 2 for those of you attending the seminars at
Clackamas Community College last week (and next week). Read through the
example then perform the problem that follows, send it to me by 9/30/01.
Feel free to send me the answer even if you didn't attend the seminar.
If you have questions, email me at TheBakerGroup@home.com or call me
8am-5pm at 503-630-2896.

Determine the length of wire in the example using NFPA 70 and a
volt-ohm-meter.
                                                               
            |<-------------  d = ? feet ------------>|

+-----------+      .-.  .-.    .-.  .-.    .-.  .-.     
|+----+   + +--.  /   /     /   /     /   /       
||VOM |     |   /    /    /    /    /    /    `x-<-Twisted
|+----+   - +---'   /     /   /     /   /     /   together
+-----------+     `-'    `-'  `-'    `-'  `-'    `-'     
Simpson(r)
Model 260 VOM                              

R = 4 ohm
d = wire run distance
L = length of copper wire (two times d)                                

The wire is 14AWG 7-strand uncoated copper.

Step 1)
-------
If I run a 2-conductor wire on a job site and need to know the wire run
length (d) I just installed (to calculate volt-drop for example) and the
wire jacket does not include this information, I can twist the pair
together at one end, attach my trusty Simpson(r) 260
volt-ohm-milliammeter to the open pair and determine the resistance in
ohms represented by the pair of wires.


Step 2)
-------
My meter tells me that the pair of wires represents 4 ohm of resistance.
I can now say that the *entire* length of wire L = 4 ohm or.


Step 3)
-------
Using Table 8 Conductor Properties in NFPA 70-1999 (Chapter 9 page 567)
I see that 14AWG 7-strand uncoated copper has 3.14 ohm per 1000 feet (at
167 degrees F) or;

3.14 ohm
--------
1000 ft 


Step 4)
-------
To determine how many feet is represented by our wire run;

4 ohm   1000 ft    4000 ohm-ft  1274 ft
----- x -------- = ---------- = -------
L       3.14 ohm   3.14 ohm-l   L


Step 5)
-------
Remember that L is the total length of copper and d is the wire run
distance or L/2;

1274 ft
------- = 637 ft
2

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

Try this one on your own:

Determine the length of wire in the example using NFPA 70 and a
volt-ohm-meter.
                                                               
            |<-------------  d = ? feet ------------>|

+-----------+      .-.  .-.    .-.  .-.    .-.  .-.     
|+----+   + +--.  /   /     /   /     /   /       
||VOM |     |   /    /    /    /    /    /    `x-<-Twisted
|+----+   - +---'   /     /   /     /   /     /   together
+-----------+     `-'    `-'  `-'    `-'  `-'    `-'     
Simpson(r)
Model 260 VOM                              

R = 2 ohm
d = wire run distance
L = length of copper wire (two times d)                                

The wire is 10AWG 1-strand uncoated copper.


extra credit:
-------------
The average temperature in this example is 68 degrees fahrenheit. Does
this affect the calculations? If so, how?

================================================================
TEST DATES 
================================================================

Oregon
------
PCC Sylvania, Portland;
Test 11/19/01. Postmark deadline 9/29/01.

Clackamas Community College, Oregon City;
Test 11/19/01. Postmark deadline 9/29/01.

Washington
----------
Bates Technical College, Tacoma;
Test 11/19/01. Postmark deadline 9/29/01.

Walla Walla Community College;
Test 12/14/01. Postmark deadline 10/27/01.

Spokane Community College;
Test 10/20/01. Postmark deadline 9/1/01.

Idaho
-----
Boise State University;
Test 11/17/01. Postmark deadline 9/29/01.

Ricks College, Rexburg;
Test 12/15/01. Postmark deadline 10/27/01.

Montana
-------
Rocky Mountain College, Billings;
Test 10/20/01. Postmark deadline 9/1/01.

Montana Tech, University of Montana, Butte;
Test 11/16/01. Postmark deadline 9/29/01.

MT State University, Bozeman;
Test 12/15/01. Postmark deadline 10/27/01.

Flathead Valley Community College, Kalispell;
Test 11/17/01. Postmark deadline 9/29/01.

For a complete list of all test centers and test dates, point your http
client to --> http://www.nicet.org/tests.shtml

================================================================
CLASS SCHEDULE 
================================================================

Clackamas Community College is sponsoring a 16-hour weekday evening
seminar in October:

--> 10-20-2001 8am - 5pm NICET Certification application process and
Fire Alarm Systems Level I Element Review

--> 10-27-2001 8am - 5pm Fire Alarm Systems Level II Element Review

Visit http://www.geocities.com/michaelbaker/outline.pdf or
http://www.lerc.org for more information and to register.

================================================================
ADMINISTRIVIA 
================================================================

I'm looking for an Ademco 685-9 line card for use with a Base10 ATU.
Call me at 503-630-2896 if you have one for sale or know where I can
find one (or more).

Send your contributions, suggestions, comments, and questions to -->
mailto:TheBakerGroup@home.com

To unsubscribe, click the reply button and type 'unsubscribe' in the
subject line.

Good luck and have fun!

Mike  http://go.to/baker

================================================================
NW NICET Newsletter Copyright (c) 2001 Michael B. Baker
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