|
C-7
– Low Voltage Systems Contractor
A communication and
low voltage contractor installs, services and maintains all types of
communication and low voltage systems which are energy limited and do
not exceed 91 volts. These systems include, but are not limited to
telephone systems, sound systems, cable television systems,
closed-circuit video systems, satellite dish antennas, instrumentation
and temperature controls, and low voltage landscape lighting. Low
voltage fire alarm systems are specifically not included in this
section.
The Low Voltage
Systems (C-7) Examination is divided into four major sections. These
sections are:
1.
Pre-Installation, Coordination, & Design (15%)
- Interpretation
and application of plans for low voltage systems
- Compliance with
codes
- Coordination
with owner, architect, & other trades
2.
Installation of Low Voltage Systems (48%)
- Pre-wiring
- Installation of
various low voltage systems (e.g., fiber optic, voice, and data, cable
TV/satellite)
- Testing methods
and testing equipment
3.
Troubleshooting Low Voltage Systems (13%)
- Troubleshooting
- Repair/Replacement
of low voltage systems and components
4.
Safety (24%)
- Identification
of work site hazards
- Safe work
practices
*Percentages
are approximate*
The following
questions are typical of the types of items that are on the
examination. The correct answer is highlighted.
1. What is
the proportional relationship between conductor length and conductor
size?
a. resistance
b. impedance
c. capacitance
d. attenuation
2. When
running low voltage cables in a ceiling that is being used for air
handling, what type of cable should be installed?
a. fiber-optic
cable
b. shielded
cable
c. PVC-jacketed
cable
d. plenum-rated cable
3. What are
the general wiring requirements for a 70 volt background music-only
sound system with minimal voltage drop?
a. one
pair of No. 14 AWG wire
b. one
pair of No. 16 AWG wire
c. one
pair of No. 18 AWG wire
d. one pair of No. 22 AWG
wire
*All
questions are written and reviewed by licensed contractors who are
actively working in the field*
American
Electricians' Handbook.
McGraw-Hill,
Inc.
1221
Avenue of the Americas,
New
York, NY 10020.
INTERNET:
www.mcgraw-hill.com
California
Building Code.
International
Conference of Building Officials,
5360
Workman Mill Road,
Whittier,
CA 90601-2298.
(800)
284-4406. FAX: (888) 329-4226.
INTERNET:
www.icbo.org
Cal/OSHA
Construction Safety Orders.
California
Code of Regulations, Title 8, Industrial Relations, Division 1, Chapter
4, Subchapter 4
Barclays
Law Publishers,
P.O.
Box 95767, Chicago, IL 60694.
(800)
888-3600. FAX: (415) 732-8875.
OR
Building News, Inc.
1612
S. Clementine Street, Anaheim, CA 92802.
(800)
873-6397 or FAX: (714) 535-8078
INTERNET:
ccr.oal.ca.gov/cgi-bin/om_isapi.dll
or www.bni-books.com
Cedia
Guide to Home Networking.
Custom
Electronic Design & Installaion Association,
(800)
669-5329.
INTERNET:
www.cedia.org
Modern
Residential and Commercial Electrical Wiring.
Prentice
Hall,
P.O.
Box 11071,
Des
Moines, IA 50336.
(800)
374-1200. FAX: (800) 835-5327.
INTERNET:
www.phdirect.com
National
Electrical Code.
National
Fire Protection Association
11
Tracy Drive,
Avon,
MA 02322.
(800)
344-3555. FAX: (800) 593-6372.
INTERNET:
www.nfpa.org
National
Electrical Code Handbook.
National
Fire Protection Association,
11
Tracy Drive,
Avon,
MA 02322.
(800)
344-3555. FAX: (800) 593-6372.
INTERNET:
www.nfpa.org
Residential
Wiring.
Craftsman
Book Company,
P.O.
Box 6500,
Carlsbad,
CA 92018.
(800)
829-8123. FAX: (619) 438-0398.
INTERNET:
www.craftsman-book.com
TIA/EIA
95-B; TIA/EIA 222-F; TIA/EIA 232-F; TIA/EIA 568-A; TIA/EIA 569-A;
TIA/EIA 606; TIA/EIA 607; TIA/EIA TSB31-B.
Global
Engineering Documents,
15
Inverness Way East,
Englewood,
CO 80112-5704.
(800)
854-7179.
INTERNET:
www.tiaonline.org
Ugly's
Electrical References.
Burleson
Distributing Corporation,
3501
Oak Forest Drive,
Houston,
TX 77018-6121.
(800)
531-1660. FAX: (713) 956-6576.
INTERNET:
www.nfpa.org
|
