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.

Authority cited: Sections 7008 and 7059, Reference: Sections 7058 and 7059 (Business and Professions Code)

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*

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?

1. red
2. black
3. green
4. white

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

1. THHN
2. THWN
3. MTW
4. 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?

1. 14
2. 21
3. 34
4. 42

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

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

*Publisher information is current as of 8/04*