CALIFORNIA C-10 ELECTRICAL CONTRACTOR
EXAM – QUESTIONS AND ANSWERS | VERIFIED
AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
*CORE DOMAINS*
*• Planning and Estimating*
*• Rough Wiring*
*• Finish Wiring and Trim*
*• Motors, Controls, and Tran
*• Grounding and Bonding*
*• Troubleshooting and Mainten
*• Safety and California Code
*• Low Voltage and Special Sy
*INTRODUCTION*
The California C-10 Electrical Contractor examination is
a comprehensive assessment designed to evaluate the
technical proficiency and regulatory knowledge required
for licensure. This exam ensures that candidates
,possess the necessary skills to safely design, install,
and maintain electrical systems in accordance with the
National Electrical Code and California-specific
amendments. The assessment is structured using a
combination of objective multiple-choice questions and
complex, scenario-based problems that reflect real-world
field conditions. Candidates must demonstrate
excellence in decision-making, blueprint reading, and
safety protocols to ensure the protection of life and
property. Successful completion signifies a high level of
professional competence in the electrical trade.
*SECTION ONE*
1. Which of the following is the minimum clearance
for overhead service conductors from a window
that is designed to be opened?
A. 3 feet
B. 5 feet
,C. 8 feet
D. 10 feet
🟢 3 feet
🔴 Explanation: According to NEC 230.9, service
conductors must have a clearance of not less than 3 feet
from windows that are designed to be opened, doors,
porches, stairs, fire escapes, or similar locations.
2. When installing a 120-volt, 20-ampere branch
circuit for a bathroom receptacle, what is the
maximum distance the receptacle can be from the
outside edge of each basin?
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
🟢 3 feet
🔴 Explanation: NEC 210.52(D) requires at least one
receptacle outlet to be installed in bathrooms within 3
, feet of the outside edge of each basin.
3. An electrical contractor is calculating the load for a
commercial kitchen. What percentage of the
nameplate rating should be used for the branch-
circuit conductors supplying a single commercial
dishwasher?
A. 80%
B. 100%
C. 125%
D. 150%
🟢 125%
🔴 Explanation: Under NEC 422.10(A), for a continuous
load (an appliance expected to run for 3 hours or more),
the branch-circuit rating shall not be less than 125% of
the nameplate rating.
4. What is the maximum number of #12 AWG THHN
conductors allowed in a 3/4-inch EMT conduit?
EXAM – QUESTIONS AND ANSWERS | VERIFIED
AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
*CORE DOMAINS*
*• Planning and Estimating*
*• Rough Wiring*
*• Finish Wiring and Trim*
*• Motors, Controls, and Tran
*• Grounding and Bonding*
*• Troubleshooting and Mainten
*• Safety and California Code
*• Low Voltage and Special Sy
*INTRODUCTION*
The California C-10 Electrical Contractor examination is
a comprehensive assessment designed to evaluate the
technical proficiency and regulatory knowledge required
for licensure. This exam ensures that candidates
,possess the necessary skills to safely design, install,
and maintain electrical systems in accordance with the
National Electrical Code and California-specific
amendments. The assessment is structured using a
combination of objective multiple-choice questions and
complex, scenario-based problems that reflect real-world
field conditions. Candidates must demonstrate
excellence in decision-making, blueprint reading, and
safety protocols to ensure the protection of life and
property. Successful completion signifies a high level of
professional competence in the electrical trade.
*SECTION ONE*
1. Which of the following is the minimum clearance
for overhead service conductors from a window
that is designed to be opened?
A. 3 feet
B. 5 feet
,C. 8 feet
D. 10 feet
🟢 3 feet
🔴 Explanation: According to NEC 230.9, service
conductors must have a clearance of not less than 3 feet
from windows that are designed to be opened, doors,
porches, stairs, fire escapes, or similar locations.
2. When installing a 120-volt, 20-ampere branch
circuit for a bathroom receptacle, what is the
maximum distance the receptacle can be from the
outside edge of each basin?
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
🟢 3 feet
🔴 Explanation: NEC 210.52(D) requires at least one
receptacle outlet to be installed in bathrooms within 3
, feet of the outside edge of each basin.
3. An electrical contractor is calculating the load for a
commercial kitchen. What percentage of the
nameplate rating should be used for the branch-
circuit conductors supplying a single commercial
dishwasher?
A. 80%
B. 100%
C. 125%
D. 150%
🟢 125%
🔴 Explanation: Under NEC 422.10(A), for a continuous
load (an appliance expected to run for 3 hours or more),
the branch-circuit rating shall not be less than 125% of
the nameplate rating.
4. What is the maximum number of #12 AWG THHN
conductors allowed in a 3/4-inch EMT conduit?
