Kansas Electrical Plans Examiner
Examination Advanced 100-Question
Practice Exam 2026 | Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1.
During review of a commercial electrical plan, the designer shows a 480Y/277-volt
service supplying a large office building. What is the primary purpose of
identifying the service voltage and configuration on the electrical drawings?
A. To establish the architectural occupancy classification
B. To determine conductor insulation color only
C. To establish the system characteristics needed to evaluate equipment,
protection, grounding, and distribution
D. To determine the building's fire-resistance rating
Answer: The system characteristics needed to evaluate equipment, protection,
grounding, and distribution
Rationale: The service voltage, phase, frequency, and configuration affect
conductor sizing, overcurrent protection, equipment ratings, grounding, voltage
drop, and downstream distribution.
,2.
A plan reviewer discovers that the electrical drawings show a 400-ampere service
disconnect but the calculated load is 427 amperes. What is the most appropriate
initial plan-review action?
A. Approve because the service has a standard rating
B. Require the designer to address the calculated load and service rating
C. Require only larger grounding electrode conductors
D. Ignore the discrepancy if the utility transformer is large enough
Answer: Require the designer to address the calculated load and service rating
Rationale: The service rating must be adequate for the calculated load under the
applicable NEC requirements. A larger utility transformer does not automatically
make an undersized service acceptable.
3.
A designer calculates a continuous load of 80 amperes for a feeder. Ignoring other
loads for the calculation, what minimum ampacity is required for the continuous
portion?
A. 80 A
B. 88 A
C. 100 A
D. 120 A
Answer: 100 A
Rationale: Continuous loads are generally calculated at 125%. 80 × 1.25 = 100
amperes.
4.
A 120/208-volt, three-phase panel supplies a balanced three-phase load of 36 kW
at unity power factor. Approximately what line current is required?
,A. 75 A
B. 100 A
C. 125 A
D. 173 A
Answer: 100 A
Rationale: For a three-phase system, I = P ÷ (√3 × V × PF). Thus, 36,000 ÷ (1.732 ×
208 × 1) ≈ 100 A.
5.
A plan specifies a 75°C-rated conductor terminating on equipment marked for
75°C conductors. Which ampacity column is generally appropriate for a conductor
within the applicable conditions?
A. 60°C column
B. 75°C column
C. 90°C column only
D. 110°C column
Answer: 75°C column
Rationale: Where the equipment and conditions permit use of the 75°C rating,
the 75°C ampacity column is generally used for the applicable conductor and
termination conditions.
6.
A feeder has an ampacity of 150 amperes. The designer proposes a 150-ampere
overcurrent protective device. The feeder supplies a continuous load of 120
amperes and no other load. What is the principal concern?
A. The feeder is automatically compliant
B. The continuous load would normally require 150 amperes of ampacity before
considering other factors
C. The feeder must be protected at 125 amperes
D. The feeder must use a 200-ampere breaker
, Answer: The continuous load would normally require 150 amperes of ampacity
before considering other factors
Rationale: 120 amperes × 125% = 150 amperes. The calculated load and
conductor ampacity must be coordinated with the overcurrent protection.
7.
Which drawing information is most useful for determining whether a panelboard
has adequate short-circuit current capability?
A. Ceiling height
B. Available fault current and equipment SCCR/AIC rating
C. Room paint specification
D. Door hardware schedule
Answer: Available fault current and equipment SCCR/AIC rating
Rationale: Electrical equipment must have an interrupting or short-circuit
current rating adequate for the available fault current at its location, as
applicable.
8.
A transformer is shown on the plans without primary or secondary overcurrent
protection information. What should the plans examiner primarily request?
A. Architectural finish schedule
B. Transformer protection, conductor sizing, voltage, phase, and grounding details
C. Plumbing fixture schedule
D. Roofing details
Answer: Transformer protection, conductor sizing, voltage, phase, and
grounding details
Rationale: Transformer installations require coordinated review of primary and
secondary conductors, overcurrent protection, grounding and bonding, ratings,
and installation conditions.
Examination Advanced 100-Question
Practice Exam 2026 | Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1.
During review of a commercial electrical plan, the designer shows a 480Y/277-volt
service supplying a large office building. What is the primary purpose of
identifying the service voltage and configuration on the electrical drawings?
A. To establish the architectural occupancy classification
B. To determine conductor insulation color only
C. To establish the system characteristics needed to evaluate equipment,
protection, grounding, and distribution
D. To determine the building's fire-resistance rating
Answer: The system characteristics needed to evaluate equipment, protection,
grounding, and distribution
Rationale: The service voltage, phase, frequency, and configuration affect
conductor sizing, overcurrent protection, equipment ratings, grounding, voltage
drop, and downstream distribution.
,2.
A plan reviewer discovers that the electrical drawings show a 400-ampere service
disconnect but the calculated load is 427 amperes. What is the most appropriate
initial plan-review action?
A. Approve because the service has a standard rating
B. Require the designer to address the calculated load and service rating
C. Require only larger grounding electrode conductors
D. Ignore the discrepancy if the utility transformer is large enough
Answer: Require the designer to address the calculated load and service rating
Rationale: The service rating must be adequate for the calculated load under the
applicable NEC requirements. A larger utility transformer does not automatically
make an undersized service acceptable.
3.
A designer calculates a continuous load of 80 amperes for a feeder. Ignoring other
loads for the calculation, what minimum ampacity is required for the continuous
portion?
A. 80 A
B. 88 A
C. 100 A
D. 120 A
Answer: 100 A
Rationale: Continuous loads are generally calculated at 125%. 80 × 1.25 = 100
amperes.
4.
A 120/208-volt, three-phase panel supplies a balanced three-phase load of 36 kW
at unity power factor. Approximately what line current is required?
,A. 75 A
B. 100 A
C. 125 A
D. 173 A
Answer: 100 A
Rationale: For a three-phase system, I = P ÷ (√3 × V × PF). Thus, 36,000 ÷ (1.732 ×
208 × 1) ≈ 100 A.
5.
A plan specifies a 75°C-rated conductor terminating on equipment marked for
75°C conductors. Which ampacity column is generally appropriate for a conductor
within the applicable conditions?
A. 60°C column
B. 75°C column
C. 90°C column only
D. 110°C column
Answer: 75°C column
Rationale: Where the equipment and conditions permit use of the 75°C rating,
the 75°C ampacity column is generally used for the applicable conductor and
termination conditions.
6.
A feeder has an ampacity of 150 amperes. The designer proposes a 150-ampere
overcurrent protective device. The feeder supplies a continuous load of 120
amperes and no other load. What is the principal concern?
A. The feeder is automatically compliant
B. The continuous load would normally require 150 amperes of ampacity before
considering other factors
C. The feeder must be protected at 125 amperes
D. The feeder must use a 200-ampere breaker
, Answer: The continuous load would normally require 150 amperes of ampacity
before considering other factors
Rationale: 120 amperes × 125% = 150 amperes. The calculated load and
conductor ampacity must be coordinated with the overcurrent protection.
7.
Which drawing information is most useful for determining whether a panelboard
has adequate short-circuit current capability?
A. Ceiling height
B. Available fault current and equipment SCCR/AIC rating
C. Room paint specification
D. Door hardware schedule
Answer: Available fault current and equipment SCCR/AIC rating
Rationale: Electrical equipment must have an interrupting or short-circuit
current rating adequate for the available fault current at its location, as
applicable.
8.
A transformer is shown on the plans without primary or secondary overcurrent
protection information. What should the plans examiner primarily request?
A. Architectural finish schedule
B. Transformer protection, conductor sizing, voltage, phase, and grounding details
C. Plumbing fixture schedule
D. Roofing details
Answer: Transformer protection, conductor sizing, voltage, phase, and
grounding details
Rationale: Transformer installations require coordinated review of primary and
secondary conductors, overcurrent protection, grounding and bonding, ratings,
and installation conditions.
