ELECTRICAL CONTRACTOR LICENSING
EXAMINATION WITH ACTUAL QUESTIONS
AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED 100% PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. A 120/240-volt, single-phase dwelling service has a calculated load
of 180 amperes. The service disconnecting means is rated 200
amperes. Which statement is MOST appropriate?
A. The service disconnect must be exactly 180 amperes
B. A 200-ampere service disconnect can be used when properly sized
and permitted by the applicable code
C. The service disconnect must be 225 amperes because calculated loads
must be rounded upward by 45 amperes
D. The service disconnect must be rated at 150 amperes because
calculated loads cannot exceed 80% of the disconnect rating
Answer: B. A 200-ampere service disconnect can be used when
properly sized and permitted by the applicable code
Rationale: A calculated service load of 180 amperes does not
ordinarily require a disconnect rated at exactly 180 amperes. A
standard 200-ampere rating can accommodate the calculated load
when the service conductors, equipment, overcurrent protection, and
other applicable requirements are correctly coordinated. The
contractor must still verify the applicable code's standard ampere
ratings and conductor ampacity requirements rather than simply
selecting equipment based on the calculated load alone.
1
,2. A contractor installs a 20-ampere, 120-volt branch circuit using
copper conductors rated 90°C. The circuit supplies ordinary
receptacles in a general-use area. Which conductor ampacity is
generally used for the final ampacity determination after applying
the applicable adjustment and correction factors?
A. Always the 90°C ampacity
B. The 60°C ampacity where the equipment termination limitations
require it
C. The 75°C ampacity regardless of equipment rating
D. The conductor's insulation temperature rating alone determines the
allowable ampacity
Answer: B. The 60°C ampacity where the equipment termination
limitations require it
Rationale: The conductor insulation temperature rating does not
automatically permit use of that higher temperature ampacity at every
termination. For equipment rated 100 amperes or less, or conductors
No. 1 AWG and smaller, the applicable termination provisions
generally require the 60°C column unless equipment is specifically
identified for higher-temperature conductors. The 90°C rating can be
useful for adjustment and correction calculations, but it may not
necessarily be used as the final allowable ampacity.
3. A feeder supplies a continuous load of 32 amperes. Assuming no
other loads or special provisions apply, what is the minimum
ampacity required for the feeder conductors?
A. 32 A
B. 35 A
2
,C. 40 A
D. 45 A
Answer: C. 40 A
Rationale: A continuous load is generally calculated at 125% for
conductor and overcurrent-protection sizing. Therefore, 32 A × 1.25 =
40 A. The contractor must then select conductors and overcurrent
protection consistent with the calculated load and the applicable
equipment and code requirements.
4. Which condition BEST describes a continuous load for electrical
design purposes?
A. A load operating for more than 30 minutes
B. A load expected to operate at its maximum current for three hours or
more
C. Any load connected to a dedicated circuit
D. Any load supplied by a feeder rather than a branch circuit
Answer: B. A load expected to operate at its maximum current for
three hours or more
Rationale: Electrical codes commonly define a continuous load based
on operation at the maximum current for a specified period,
traditionally three hours or more. Such loads receive special
consideration because sustained current can produce prolonged
conductor and equipment heating.
5. A 240-volt electric heater has a nameplate rating of 4,800 watts.
What is its approximate operating current?
A. 10 A
B. 15 A
3
, C. 20 A
D. 30 A
Answer: C. 20 A
Rationale: Using I = P ÷ V, the current is 4,800 W ÷ 240 V = 20 A. If
the heater is a continuous load, additional sizing requirements may
apply, including the applicable 125% factor for the continuous portion
of the load.
6. A contractor installs an equipment grounding conductor with a
branch circuit. What is the PRIMARY purpose of this conductor?
A. To carry normal circuit current
B. To increase operating voltage
C. To provide a low-impedance fault-current path that facilitates
operation of the overcurrent device
D. To replace the grounded conductor
Answer: C. To provide a low-impedance fault-current path that
facilitates operation of the overcurrent device
Rationale: The equipment grounding conductor normally carries no
load current. Its primary function is to provide an effective fault-
current path from exposed conductive parts back to the source so that
a fault produces sufficient current to operate the overcurrent
protective device promptly.
7. At the service disconnecting means, the grounded conductor is
bonded to the service equipment enclosure. Why is this connection
important?
A. It allows normal branch-circuit current to flow on all metal raceways
B. It establishes the required connection between the grounded circuit
4
EXAMINATION WITH ACTUAL QUESTIONS
AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED 100% PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. A 120/240-volt, single-phase dwelling service has a calculated load
of 180 amperes. The service disconnecting means is rated 200
amperes. Which statement is MOST appropriate?
A. The service disconnect must be exactly 180 amperes
B. A 200-ampere service disconnect can be used when properly sized
and permitted by the applicable code
C. The service disconnect must be 225 amperes because calculated loads
must be rounded upward by 45 amperes
D. The service disconnect must be rated at 150 amperes because
calculated loads cannot exceed 80% of the disconnect rating
Answer: B. A 200-ampere service disconnect can be used when
properly sized and permitted by the applicable code
Rationale: A calculated service load of 180 amperes does not
ordinarily require a disconnect rated at exactly 180 amperes. A
standard 200-ampere rating can accommodate the calculated load
when the service conductors, equipment, overcurrent protection, and
other applicable requirements are correctly coordinated. The
contractor must still verify the applicable code's standard ampere
ratings and conductor ampacity requirements rather than simply
selecting equipment based on the calculated load alone.
1
,2. A contractor installs a 20-ampere, 120-volt branch circuit using
copper conductors rated 90°C. The circuit supplies ordinary
receptacles in a general-use area. Which conductor ampacity is
generally used for the final ampacity determination after applying
the applicable adjustment and correction factors?
A. Always the 90°C ampacity
B. The 60°C ampacity where the equipment termination limitations
require it
C. The 75°C ampacity regardless of equipment rating
D. The conductor's insulation temperature rating alone determines the
allowable ampacity
Answer: B. The 60°C ampacity where the equipment termination
limitations require it
Rationale: The conductor insulation temperature rating does not
automatically permit use of that higher temperature ampacity at every
termination. For equipment rated 100 amperes or less, or conductors
No. 1 AWG and smaller, the applicable termination provisions
generally require the 60°C column unless equipment is specifically
identified for higher-temperature conductors. The 90°C rating can be
useful for adjustment and correction calculations, but it may not
necessarily be used as the final allowable ampacity.
3. A feeder supplies a continuous load of 32 amperes. Assuming no
other loads or special provisions apply, what is the minimum
ampacity required for the feeder conductors?
A. 32 A
B. 35 A
2
,C. 40 A
D. 45 A
Answer: C. 40 A
Rationale: A continuous load is generally calculated at 125% for
conductor and overcurrent-protection sizing. Therefore, 32 A × 1.25 =
40 A. The contractor must then select conductors and overcurrent
protection consistent with the calculated load and the applicable
equipment and code requirements.
4. Which condition BEST describes a continuous load for electrical
design purposes?
A. A load operating for more than 30 minutes
B. A load expected to operate at its maximum current for three hours or
more
C. Any load connected to a dedicated circuit
D. Any load supplied by a feeder rather than a branch circuit
Answer: B. A load expected to operate at its maximum current for
three hours or more
Rationale: Electrical codes commonly define a continuous load based
on operation at the maximum current for a specified period,
traditionally three hours or more. Such loads receive special
consideration because sustained current can produce prolonged
conductor and equipment heating.
5. A 240-volt electric heater has a nameplate rating of 4,800 watts.
What is its approximate operating current?
A. 10 A
B. 15 A
3
, C. 20 A
D. 30 A
Answer: C. 20 A
Rationale: Using I = P ÷ V, the current is 4,800 W ÷ 240 V = 20 A. If
the heater is a continuous load, additional sizing requirements may
apply, including the applicable 125% factor for the continuous portion
of the load.
6. A contractor installs an equipment grounding conductor with a
branch circuit. What is the PRIMARY purpose of this conductor?
A. To carry normal circuit current
B. To increase operating voltage
C. To provide a low-impedance fault-current path that facilitates
operation of the overcurrent device
D. To replace the grounded conductor
Answer: C. To provide a low-impedance fault-current path that
facilitates operation of the overcurrent device
Rationale: The equipment grounding conductor normally carries no
load current. Its primary function is to provide an effective fault-
current path from exposed conductive parts back to the source so that
a fault produces sufficient current to operate the overcurrent
protective device promptly.
7. At the service disconnecting means, the grounded conductor is
bonded to the service equipment enclosure. Why is this connection
important?
A. It allows normal branch-circuit current to flow on all metal raceways
B. It establishes the required connection between the grounded circuit
4
