CALIFORNIA ELECTRICAL CONTRACTOR
LICENSE EXAM (C-10)
Questions and Answer (Verified Answers) plus Rationales 2026 Q&A
C-10 Electrical Contractor Exam • Study Practice Page 1
, Practice Examination
This is an independent study resource, not an official California Contractors State License Board examination. Consult current codes, approved
plans, manufacturer instructions, and applicable California requirements for real projects.
1. [Electrical plans] During an electrical project, the supervisor encounters this situation: The electrical plans
conflict with actual field conditions at a proposed equipment location. What is the best action?
A. Install according to whichever drawing is easiest to follow.
B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
C. Conceal the conflict and explain it only if asked.
D. Make the change without documenting it.
Correct answer: B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
2. [Electrical plans] Before installation, the contractor discovers: The electrical plans conflict with actual field
conditions at a proposed equipment location. Which response is most appropriate?
A. Make the change without documenting it.
B. Conceal the conflict and explain it only if asked.
C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
D. Install according to whichever drawing is easiest to follow.
Correct answer: C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
3. [Electrical plans] At inspection, the following condition is observed: The electrical plans conflict with actual field
conditions at a proposed equipment location. What should happen next?
A. Conceal the conflict and explain it only if asked.
B. Install according to whichever drawing is easiest to follow.
C. Make the change without documenting it.
D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
Correct answer: D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
4. [Electrical plans] A customer asks how to handle this electrical issue: The electrical plans conflict with actual
field conditions at a proposed equipment location. Which practice is correct?
A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
B. Conceal the conflict and explain it only if asked.
C. Install according to whichever drawing is easiest to follow.
D. Make the change without documenting it.
Correct answer: A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
C-10 Electrical Contractor Exam • Study Practice Page 2
, 5. [Electrical plans] Before energization, this concern is identified: The electrical plans conflict with actual field
conditions at a proposed equipment location. What is the soundest course of action?
A. Make the change without documenting it.
B. Install according to whichever drawing is easiest to follow.
C. Conceal the conflict and explain it only if asked.
D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
Correct answer: D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
6. [Electrical plans] While preparing the work area, the crew notices: The electrical plans conflict with actual field
conditions at a proposed equipment location. What should the team do?
A. Install according to whichever drawing is easiest to follow.
B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
C. Conceal the conflict and explain it only if asked.
D. Make the change without documenting it.
Correct answer: B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
7. [Electrical plans] During troubleshooting, the technician finds: The electrical plans conflict with actual field
conditions at a proposed equipment location. Which action best addresses the problem?
A. Conceal the conflict and explain it only if asked.
B. Install according to whichever drawing is easiest to follow.
C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
D. Make the change without documenting it.
Correct answer: C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
8. [Electrical plans] On a commercial project, this condition arises: The electrical plans conflict with actual field
conditions at a proposed equipment location. What is the most defensible next step?
A. Conceal the conflict and explain it only if asked.
B. Make the change without documenting it.
C. Install according to whichever drawing is easiest to follow.
D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
Correct answer: D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
9. [Electrical plans] Before the circuit is concealed, the foreperson notes: The electrical plans conflict with actual
field conditions at a proposed equipment location. Which response is appropriate?
A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
B. Install according to whichever drawing is easiest to follow.
C. Make the change without documenting it.
D. Conceal the conflict and explain it only if asked.
Correct answer: A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
C-10 Electrical Contractor Exam • Study Practice Page 3
, 10. [Electrical plans] During final review, the inspector identifies: The electrical plans conflict with actual field
conditions at a proposed equipment location. What should be done?
A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
B. Conceal the conflict and explain it only if asked.
C. Make the change without documenting it.
D. Install according to whichever drawing is easiest to follow.
Correct answer: A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
11. [Circuit loading] During an electrical project, the supervisor encounters this situation: A proposed circuit will
supply equipment whose calculated load may exceed the circuit rating. What is the best action?
A. Assume the nameplate load can be ignored.
B. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
C. Install a larger breaker without checking conductor ampacity.
D. Connect the equipment and see whether the breaker trips.
Correct answer: B. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
12. [Circuit loading] Before installation, the contractor discovers: A proposed circuit will supply equipment whose
calculated load may exceed the circuit rating. Which response is most appropriate?
A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
B. Connect the equipment and see whether the breaker trips.
C. Assume the nameplate load can be ignored.
D. Install a larger breaker without checking conductor ampacity.
Correct answer: A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
13. [Circuit loading] At inspection, the following condition is observed: A proposed circuit will supply equipment
whose calculated load may exceed the circuit rating. What should happen next?
A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
B. Connect the equipment and see whether the breaker trips.
C. Install a larger breaker without checking conductor ampacity.
D. Assume the nameplate load can be ignored.
Correct answer: A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
14. [Circuit loading] A customer asks how to handle this electrical issue: A proposed circuit will supply equipment
whose calculated load may exceed the circuit rating. Which practice is correct?
A. Connect the equipment and see whether the breaker trips.
B. Install a larger breaker without checking conductor ampacity.
C. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
D. Assume the nameplate load can be ignored.
Correct answer: C. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
C-10 Electrical Contractor Exam • Study Practice Page 4
LICENSE EXAM (C-10)
Questions and Answer (Verified Answers) plus Rationales 2026 Q&A
C-10 Electrical Contractor Exam • Study Practice Page 1
, Practice Examination
This is an independent study resource, not an official California Contractors State License Board examination. Consult current codes, approved
plans, manufacturer instructions, and applicable California requirements for real projects.
1. [Electrical plans] During an electrical project, the supervisor encounters this situation: The electrical plans
conflict with actual field conditions at a proposed equipment location. What is the best action?
A. Install according to whichever drawing is easiest to follow.
B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
C. Conceal the conflict and explain it only if asked.
D. Make the change without documenting it.
Correct answer: B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
2. [Electrical plans] Before installation, the contractor discovers: The electrical plans conflict with actual field
conditions at a proposed equipment location. Which response is most appropriate?
A. Make the change without documenting it.
B. Conceal the conflict and explain it only if asked.
C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
D. Install according to whichever drawing is easiest to follow.
Correct answer: C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
3. [Electrical plans] At inspection, the following condition is observed: The electrical plans conflict with actual field
conditions at a proposed equipment location. What should happen next?
A. Conceal the conflict and explain it only if asked.
B. Install according to whichever drawing is easiest to follow.
C. Make the change without documenting it.
D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
Correct answer: D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
4. [Electrical plans] A customer asks how to handle this electrical issue: The electrical plans conflict with actual
field conditions at a proposed equipment location. Which practice is correct?
A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
B. Conceal the conflict and explain it only if asked.
C. Install according to whichever drawing is easiest to follow.
D. Make the change without documenting it.
Correct answer: A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
C-10 Electrical Contractor Exam • Study Practice Page 2
, 5. [Electrical plans] Before energization, this concern is identified: The electrical plans conflict with actual field
conditions at a proposed equipment location. What is the soundest course of action?
A. Make the change without documenting it.
B. Install according to whichever drawing is easiest to follow.
C. Conceal the conflict and explain it only if asked.
D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
Correct answer: D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
6. [Electrical plans] While preparing the work area, the crew notices: The electrical plans conflict with actual field
conditions at a proposed equipment location. What should the team do?
A. Install according to whichever drawing is easiest to follow.
B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
C. Conceal the conflict and explain it only if asked.
D. Make the change without documenting it.
Correct answer: B. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
7. [Electrical plans] During troubleshooting, the technician finds: The electrical plans conflict with actual field
conditions at a proposed equipment location. Which action best addresses the problem?
A. Conceal the conflict and explain it only if asked.
B. Install according to whichever drawing is easiest to follow.
C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
D. Make the change without documenting it.
Correct answer: C. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
8. [Electrical plans] On a commercial project, this condition arises: The electrical plans conflict with actual field
conditions at a proposed equipment location. What is the most defensible next step?
A. Conceal the conflict and explain it only if asked.
B. Make the change without documenting it.
C. Install according to whichever drawing is easiest to follow.
D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
Correct answer: D. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
9. [Electrical plans] Before the circuit is concealed, the foreperson notes: The electrical plans conflict with actual
field conditions at a proposed equipment location. Which response is appropriate?
A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
B. Install according to whichever drawing is easiest to follow.
C. Make the change without documenting it.
D. Conceal the conflict and explain it only if asked.
Correct answer: A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
C-10 Electrical Contractor Exam • Study Practice Page 3
, 10. [Electrical plans] During final review, the inspector identifies: The electrical plans conflict with actual field
conditions at a proposed equipment location. What should be done?
A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead before proceeding.
B. Conceal the conflict and explain it only if asked.
C. Make the change without documenting it.
D. Install according to whichever drawing is easiest to follow.
Correct answer: A. Pause the affected work and resolve the discrepancy with the responsible designer or project lead
before proceeding.
Rationale: Conflicts between plans and field conditions should be resolved and documented before installation.
11. [Circuit loading] During an electrical project, the supervisor encounters this situation: A proposed circuit will
supply equipment whose calculated load may exceed the circuit rating. What is the best action?
A. Assume the nameplate load can be ignored.
B. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
C. Install a larger breaker without checking conductor ampacity.
D. Connect the equipment and see whether the breaker trips.
Correct answer: B. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
12. [Circuit loading] Before installation, the contractor discovers: A proposed circuit will supply equipment whose
calculated load may exceed the circuit rating. Which response is most appropriate?
A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
B. Connect the equipment and see whether the breaker trips.
C. Assume the nameplate load can be ignored.
D. Install a larger breaker without checking conductor ampacity.
Correct answer: A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
13. [Circuit loading] At inspection, the following condition is observed: A proposed circuit will supply equipment
whose calculated load may exceed the circuit rating. What should happen next?
A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
B. Connect the equipment and see whether the breaker trips.
C. Install a larger breaker without checking conductor ampacity.
D. Assume the nameplate load can be ignored.
Correct answer: A. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
14. [Circuit loading] A customer asks how to handle this electrical issue: A proposed circuit will supply equipment
whose calculated load may exceed the circuit rating. Which practice is correct?
A. Connect the equipment and see whether the breaker trips.
B. Install a larger breaker without checking conductor ampacity.
C. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against applicable code requirements.
D. Assume the nameplate load can be ignored.
Correct answer: C. Calculate the load and verify conductor, overcurrent protection, and equipment ratings against
applicable code requirements.
Rationale: Circuit design must coordinate load, conductor ampacity, overcurrent protection, and equipment requirements.
C-10 Electrical Contractor Exam • Study Practice Page 4
