How Do I Get My Contractors License | C-10 Electrical Contractor

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C10 – Electrical Contractor

An electrical contractor places, installs, erects or connects any electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells or any part thereof, which generate, transmit, transform or utilize electrical energy in any form or for any purpose.

The Electrical (C-10) Examination is divided into five major sections. These sections are:

1. System Evaluation and Design (24%)

Existing system evaluation
Plan and specification interpretation
Electrical calculations
Code requirements
Material selection

2. Rough Wiring (25%)

System Layout
Clearance and accessibility requirements
Raceway and panel installation
Wire and equipment labeling
Grounding and bonding

3. Finish Wiring and Trim (20%)

Finish device placement and installation
Trims and sealants
System energizing and testing

4. Troubleshooting and Repair (13%)

Common electrical problems
Location, repair, and replacement of inoperable electrical wires/components
Selection and use of electrical testing equipment

5. Safety (18%)

Lock out/tag out procedures
Personal protective equipment (PPE)
Tools/equipment

*Percentages are approximate*

Sample Questions

The following questions are typical of the types of items that are on the examination. The correct answer is highlighted.

1. Which of the following colors should NOT be used for current-carrying wires?

a. red

b. black

c. green

d. white

2. Which of the following types of conductors may be used as an overhead feeder to a garage?

a. THHN

b. THWN

c. MTW

d. UF

3. What is the largest number of two-pole circuit breakers that can be used on a lighting and appliance branch circuit panelboard in a single cabinet?

a. 14

b. 21

c. 34

d. 42

*All questions are written and reviewed by licensed contractors who are actively working in the field*

Resources

American Electrician’s Handbook.

The McGraw-Hill Companies,
P.O. Box 182604,
Columbus, OH 43272.
(877) 833-5524
FAX: (614) 759-3749.

INTERNET: www.mcgrawhill.com

Cal/OSHA State of California Construction Safety Orders.

California Code of Regulations, Title 8,
Industrial Relations, Chapter 4, Subchapter 4,
Barclays Law Publishers,
P.O. Box 95767,
Chicago, IL 60694.
(800) 888-3600
FAX: (415) 732-8861.

INTERNET: ccr.oal.ca.gov

California Electrical Code.

International Conference of Building Officials Headquarters,
5360 Workman Mill Road,
Whittier, CA 90601-2298.
(800) 284-4406
FAX: (888) 329-4226.

INTERNET: www.iccsafe.org

National Electrical Code.

National Fire Protection Association,
1 Batterymarch Park,
Quincy, MA 02169-7471.
(800) 344-3555
FAX: (617) 770-0700.
INTERNET: www.nfpa.org

National Electrical Code Handbook.

National Fire Protection Association,
1 Batterymarch Park,
Quincy, MA 02169-7471.
(800) 344-3555
FAX: (617) 770-0700.
INTERNET: www.nfpa.org

National Fire Alarm Code (NFPA 72).

National Fire Protection Association,
1 Batterymarch Park,
Quincy, MA 02169-7471.
(800) 344-3555
FAX: (617) 770-0700.
INTERNET: www.nfpa.org

Ugly’s Electrical References.

National Fire Protection Association,
1 Batterymarch Park,
Quincy, MA 02169-7471.
(800) 344-3555
FAX: (617) 770-0700.
INTERNET: www.nfpa.org