TEXAS ELECTRICAL INSPECTOR
CERTIFICATION EXAM ACTUAL 2026
VERIFIED QUESTIONS WITH ANSWERS
COMPREHENSIVE & RATIONALE|INSTANT
DOWNLOAD
1. During the inspection of a newly installed service, which NEC
article primarily governs the installation requirements for electrical
services, including service conductors, equipment, and grounding?
A. Article 250
B. Article 230
C. Article 300
D. Article 110
Answer: B. Article 230
Rationale: Article 230 specifically addresses electrical services,
including service conductors, service equipment, disconnecting means,
overcurrent protection, and installation requirements. While Article 250
covers grounding and bonding, Article 230 serves as the principal
article governing service installations.
2. According to the NEC, what is the minimum required working
clearance depth in front of electrical equipment operating at 208
volts to ground where exposed live parts exist on one side and
grounded parts on the opposite side (Condition 2)?
A. 2 feet
B. 3 feet
C. 3.5 feet
D. 4 feet
Answer: C. 3.5 feet
1
,Rationale: NEC Table 110.26(A)(1) specifies working space
requirements. Under Condition 2 for equipment between 151 and 600
volts, the required clearance is 3.5 feet.
3. An electrical inspector observes EMT installed outdoors without
corrosion protection in a coastal Texas environment. What is the
most appropriate inspection action?
A. Approve because EMT is permitted outdoors everywhere.
B. Reject because corrosion protection suitable for the environment is
required.
C. Require replacement with PVC only.
D. Require replacement with rigid aluminum only.
Answer: B. Reject because corrosion protection suitable for the
environment is required.
Rationale: The NEC requires raceways exposed to corrosive
environments to be suitable for those conditions. EMT is permitted
outdoors but must be protected from corrosion where environmental
conditions warrant.
4. Which conductor insulation type is most commonly rated for 90°C
in dry and wet locations?
A. TW
B. THHN/THWN-2
C. UF
D. RHW
Answer: B. THHN/THWN-2
2
,Rationale: THHN/THWN-2 conductors are commonly installed in
commercial buildings and are rated for 90°C in both wet and dry
locations, making them highly versatile.
5. During an inspection, an inspector notices that grounded (neutral)
conductors and equipment grounding conductors terminate under
the same lug in a panelboard not specifically listed for this
purpose. What is the proper determination?
A. Acceptable if torqued properly.
B. Acceptable in residential occupancies only.
C. Violation requiring correction.
D. Acceptable when conductor sizes match.
Answer: C. Violation requiring correction.
Rationale: Most panelboard manufacturers require one grounded
conductor per terminal unless specifically listed otherwise. Equipment
grounding conductors may share terminals only where permitted by the
manufacturer's listing.
6. The purpose of bonding electrical equipment is primarily to:
A. Increase voltage.
B. Provide a low-impedance fault current path.
C. Reduce conductor size.
D. Prevent transformer overheating.
Answer: B. Provide a low-impedance fault current path.
3
, Rationale: Bonding ensures conductive parts remain at the same
electrical potential and provides an effective path for fault current,
facilitating rapid operation of overcurrent devices.
7. A service disconnect must generally be installed:
A. Anywhere on the property.
B. At the nearest readily accessible point of entrance of service
conductors.
C. Only outdoors.
D. Only indoors.
Answer: B. At the nearest readily accessible point of entrance of
service conductors.
Rationale: The NEC requires service disconnecting means to be
installed at a readily accessible location nearest the point where service
conductors enter the building.
8. What is the primary purpose of GFCI protection?
A. Protect equipment from overload.
B. Protect people from electric shock.
C. Prevent voltage drop.
D. Improve power factor.
Answer: B. Protect people from electric shock.
Rationale: Ground-Fault Circuit Interrupters detect small leakage
currents, typically around 4–6 milliamperes, and disconnect power
quickly to minimize the risk of electrocution.
4
CERTIFICATION EXAM ACTUAL 2026
VERIFIED QUESTIONS WITH ANSWERS
COMPREHENSIVE & RATIONALE|INSTANT
DOWNLOAD
1. During the inspection of a newly installed service, which NEC
article primarily governs the installation requirements for electrical
services, including service conductors, equipment, and grounding?
A. Article 250
B. Article 230
C. Article 300
D. Article 110
Answer: B. Article 230
Rationale: Article 230 specifically addresses electrical services,
including service conductors, service equipment, disconnecting means,
overcurrent protection, and installation requirements. While Article 250
covers grounding and bonding, Article 230 serves as the principal
article governing service installations.
2. According to the NEC, what is the minimum required working
clearance depth in front of electrical equipment operating at 208
volts to ground where exposed live parts exist on one side and
grounded parts on the opposite side (Condition 2)?
A. 2 feet
B. 3 feet
C. 3.5 feet
D. 4 feet
Answer: C. 3.5 feet
1
,Rationale: NEC Table 110.26(A)(1) specifies working space
requirements. Under Condition 2 for equipment between 151 and 600
volts, the required clearance is 3.5 feet.
3. An electrical inspector observes EMT installed outdoors without
corrosion protection in a coastal Texas environment. What is the
most appropriate inspection action?
A. Approve because EMT is permitted outdoors everywhere.
B. Reject because corrosion protection suitable for the environment is
required.
C. Require replacement with PVC only.
D. Require replacement with rigid aluminum only.
Answer: B. Reject because corrosion protection suitable for the
environment is required.
Rationale: The NEC requires raceways exposed to corrosive
environments to be suitable for those conditions. EMT is permitted
outdoors but must be protected from corrosion where environmental
conditions warrant.
4. Which conductor insulation type is most commonly rated for 90°C
in dry and wet locations?
A. TW
B. THHN/THWN-2
C. UF
D. RHW
Answer: B. THHN/THWN-2
2
,Rationale: THHN/THWN-2 conductors are commonly installed in
commercial buildings and are rated for 90°C in both wet and dry
locations, making them highly versatile.
5. During an inspection, an inspector notices that grounded (neutral)
conductors and equipment grounding conductors terminate under
the same lug in a panelboard not specifically listed for this
purpose. What is the proper determination?
A. Acceptable if torqued properly.
B. Acceptable in residential occupancies only.
C. Violation requiring correction.
D. Acceptable when conductor sizes match.
Answer: C. Violation requiring correction.
Rationale: Most panelboard manufacturers require one grounded
conductor per terminal unless specifically listed otherwise. Equipment
grounding conductors may share terminals only where permitted by the
manufacturer's listing.
6. The purpose of bonding electrical equipment is primarily to:
A. Increase voltage.
B. Provide a low-impedance fault current path.
C. Reduce conductor size.
D. Prevent transformer overheating.
Answer: B. Provide a low-impedance fault current path.
3
, Rationale: Bonding ensures conductive parts remain at the same
electrical potential and provides an effective path for fault current,
facilitating rapid operation of overcurrent devices.
7. A service disconnect must generally be installed:
A. Anywhere on the property.
B. At the nearest readily accessible point of entrance of service
conductors.
C. Only outdoors.
D. Only indoors.
Answer: B. At the nearest readily accessible point of entrance of
service conductors.
Rationale: The NEC requires service disconnecting means to be
installed at a readily accessible location nearest the point where service
conductors enter the building.
8. What is the primary purpose of GFCI protection?
A. Protect equipment from overload.
B. Protect people from electric shock.
C. Prevent voltage drop.
D. Improve power factor.
Answer: B. Protect people from electric shock.
Rationale: Ground-Fault Circuit Interrupters detect small leakage
currents, typically around 4–6 milliamperes, and disconnect power
quickly to minimize the risk of electrocution.
4
