TEXAS ELECTRICIAN LICENSE EXAMINATION
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST UPDATE THIS YEAR JUST RELEASED
Exam Coverage Summary
1. National Electrical Code (NEC) – Structure, application, and code interpretation.
2. Electrical Theory – Voltage, current, resistance, power, Ohm's Law, and circuit calculations.
3. Wiring Methods and Materials – Conduit types, conductors, raceways, cable assemblies, and fittings.
4. Grounding and Bonding – Equipment grounding, grounding electrodes, bonding requirements, and fault
current paths.
5. Services and Feeders – Service calculations, conductor sizing, overcurrent protection, and load
calculations.
6. Motors and Controls – Motor installation, overload protection, controllers, disconnects, and branch
circuits.
7. Transformers and Special Equipment – Transformer installation, calculations, and protection.
8. Occupancy Requirements – Residential, commercial, industrial, hazardous locations, healthcare, and
special occupancies.
9. Safety Practices – OSHA requirements, PPE, lockout/tagout, electrical hazards, and safe work procedures.
10. Electrical Calculations and Code Application – Voltage drop, box fill, conduit fill, conductor ampacity,
derating, and practical NEC problem-solving.
Texas Electrician License Examination
Question 1
According to the National Electrical Code, why is understanding the purpose and
proper application of Article 90 particularly important for electricians who must
consistently interpret code requirements during residential, commercial, and
industrial electrical installations?
A. It provides mandatory wiring colour standards only.
B. It explains the purpose, scope, enforcement, and arrangement of the NEC.
C. It lists only grounding conductor sizes.
,D. It replaces OSHA safety regulations.
Answer: B
Rationale:
Article 90 introduces the NEC, explaining its purpose, scope, arrangement, and
enforcement principles, helping electricians correctly interpret later code
requirements.
Question 2
While troubleshooting a branch circuit supplying several receptacles, an
electrician measures 120 volts but no current flow because the circuit is open.
Which electrical principle best explains why voltage may exist even though no
current is flowing through the circuit?
A. Current flows without resistance.
B. Voltage represents electrical potential difference that exists even without a
complete path.
C. Resistance creates voltage.
D. Power always equals zero whenever voltage is present.
Answer: B
Rationale:
Voltage is electrical potential. Current only flows when a complete conductive
path exists.
Question 3
An electrician installs a conductor inside electrical metallic tubing that passes
through several damp locations before entering an indoor panelboard. Which
,factor is most important when selecting the conductor insulation type for this
installation?
A. Wire colour only.
B. Temperature rating and suitability for wet locations.
C. Manufacturer logo.
D. Panelboard brand.
Answer: B
Rationale:
Conductors installed in raceways located in wet or damp locations must have
insulation approved for wet conditions.
Question 4
Which statement best describes the primary purpose of equipment grounding
conductors in electrical systems installed according to the National Electrical
Code and accepted electrical safety practices?
A. Increase normal operating current.
B. Provide a low-impedance path for fault current to facilitate overcurrent device
operation.
C. Carry neutral current continuously.
D. Reduce conductor resistance during normal operation.
Answer: B
Rationale:
Equipment grounding conductors safely carry fault current, allowing breakers or
fuses to quickly clear faults.
, Question 5
When performing residential service load calculations under the National
Electrical Code, why must electricians accurately determine the connected load
before selecting service conductors and overcurrent protection devices?
A. To minimise grounding conductor size.
B. To ensure conductors and protective devices are properly sized for expected
electrical demand.
C. To eliminate voltage entirely.
D. To reduce conduit fill requirements.
Answer: B
Rationale:
Proper load calculations prevent undersized conductors and overloaded service
equipment.
Question 6
An electrician installs a three-phase motor that repeatedly trips during startup.
Which protective device is specifically intended to protect the motor from
sustained overload conditions rather than short circuits?
A. Motor overload relay.
B. Ground rod.
C. Junction box.
D. Service disconnect.
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST UPDATE THIS YEAR JUST RELEASED
Exam Coverage Summary
1. National Electrical Code (NEC) – Structure, application, and code interpretation.
2. Electrical Theory – Voltage, current, resistance, power, Ohm's Law, and circuit calculations.
3. Wiring Methods and Materials – Conduit types, conductors, raceways, cable assemblies, and fittings.
4. Grounding and Bonding – Equipment grounding, grounding electrodes, bonding requirements, and fault
current paths.
5. Services and Feeders – Service calculations, conductor sizing, overcurrent protection, and load
calculations.
6. Motors and Controls – Motor installation, overload protection, controllers, disconnects, and branch
circuits.
7. Transformers and Special Equipment – Transformer installation, calculations, and protection.
8. Occupancy Requirements – Residential, commercial, industrial, hazardous locations, healthcare, and
special occupancies.
9. Safety Practices – OSHA requirements, PPE, lockout/tagout, electrical hazards, and safe work procedures.
10. Electrical Calculations and Code Application – Voltage drop, box fill, conduit fill, conductor ampacity,
derating, and practical NEC problem-solving.
Texas Electrician License Examination
Question 1
According to the National Electrical Code, why is understanding the purpose and
proper application of Article 90 particularly important for electricians who must
consistently interpret code requirements during residential, commercial, and
industrial electrical installations?
A. It provides mandatory wiring colour standards only.
B. It explains the purpose, scope, enforcement, and arrangement of the NEC.
C. It lists only grounding conductor sizes.
,D. It replaces OSHA safety regulations.
Answer: B
Rationale:
Article 90 introduces the NEC, explaining its purpose, scope, arrangement, and
enforcement principles, helping electricians correctly interpret later code
requirements.
Question 2
While troubleshooting a branch circuit supplying several receptacles, an
electrician measures 120 volts but no current flow because the circuit is open.
Which electrical principle best explains why voltage may exist even though no
current is flowing through the circuit?
A. Current flows without resistance.
B. Voltage represents electrical potential difference that exists even without a
complete path.
C. Resistance creates voltage.
D. Power always equals zero whenever voltage is present.
Answer: B
Rationale:
Voltage is electrical potential. Current only flows when a complete conductive
path exists.
Question 3
An electrician installs a conductor inside electrical metallic tubing that passes
through several damp locations before entering an indoor panelboard. Which
,factor is most important when selecting the conductor insulation type for this
installation?
A. Wire colour only.
B. Temperature rating and suitability for wet locations.
C. Manufacturer logo.
D. Panelboard brand.
Answer: B
Rationale:
Conductors installed in raceways located in wet or damp locations must have
insulation approved for wet conditions.
Question 4
Which statement best describes the primary purpose of equipment grounding
conductors in electrical systems installed according to the National Electrical
Code and accepted electrical safety practices?
A. Increase normal operating current.
B. Provide a low-impedance path for fault current to facilitate overcurrent device
operation.
C. Carry neutral current continuously.
D. Reduce conductor resistance during normal operation.
Answer: B
Rationale:
Equipment grounding conductors safely carry fault current, allowing breakers or
fuses to quickly clear faults.
, Question 5
When performing residential service load calculations under the National
Electrical Code, why must electricians accurately determine the connected load
before selecting service conductors and overcurrent protection devices?
A. To minimise grounding conductor size.
B. To ensure conductors and protective devices are properly sized for expected
electrical demand.
C. To eliminate voltage entirely.
D. To reduce conduit fill requirements.
Answer: B
Rationale:
Proper load calculations prevent undersized conductors and overloaded service
equipment.
Question 6
An electrician installs a three-phase motor that repeatedly trips during startup.
Which protective device is specifically intended to protect the motor from
sustained overload conditions rather than short circuits?
A. Motor overload relay.
B. Ground rod.
C. Junction box.
D. Service disconnect.
