NYC ELECTRICIAN (CUNY) EXAM – QUESTIONS AND ANSWERS | VERIFIED AND
WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST
EXAM UPDATE
*Core Domains*
*• NYC Electrical Code Amendments*
*• National Electrical Code (NEC) Fundamentals*
*• AC/DC Machinery and Motor Control Systems*
*• High-Voltage Distribution and Substation Maintenance*
*• Low-Voltage Fire Alarm and Communication Systems*
*• Hazardous Locations and Specialized CUNY Facilities*
*• Electrical Safety, OSHA Regulations, and PPE Protocols*
*• Troubleshooting, Testing Instruments, and Diagnostics*
*Introduction*
The NYC Electrician (CUNY) Exam is a comprehensive assessment designed to evaluate
the technical competence, regulatory knowledge, and practical decision-making skills of
electrical professionals working within the City University of New York system. This
examination systematically assesses an individual's understanding of the New York City
Electrical Code, foundational electrical theory, complex control diagnostics, and institutional
,safety standards. Consisting of highly structured multiple-choice and complex, scenario-
based operational questions, the exam emphasizes real-world application, critical thinking,
and regulatory compliance. Candidates must demonstrate the ability to analyze sophisticated
electrical layouts, troubleshoot institutional power distribution systems, and maintain safe
working environments in compliance with public safety mandates.
**SECTION ONE**
1. A 3-phase, 460V, 50 HP squirrel-cage induction motor with a design letter B is installed
in a CUNY campus laboratory ventilation system. According to the NYC Electrical
Code, what is the maximum rating of a dual-element, time-delay fuse used for branch-
circuit short-circuit and ground-fault protection?
A. 65 amperes
B. 110 amperes
C. 150 amperes
D. 175 amperes
🟢 B. 110 amperes
🔴 Explanation: Under the NYC Electrical Code (referencing NEC Table 430.252/430.52),
the full-load current (FLC) for a 3-phase, 460V, 50 HP induction motor is 65 amperes. The
,maximum rating for a dual-element time-delay fuse is generally 175% of the motor FLC (
65 × 1.75 = 113.75 amperes). Section 430.52(C)(1) Exception 1 allows the use of the next
standard size fuse down if 175% does not match a standard size, which is 110 amperes.
2. While conducting a routine insulation resistance test on a 4,160V feeder cable
supplying a campus academic building, an electrician records a polarization index (PI)
value of 1.2. How should this condition be evaluated?
A. Excellent condition; the insulation is perfectly dry and flexible.
B. Good condition; typical for standard cross-linked polyethylene insulation.
C. Questionable or poor condition; indicates moisture contamination or degradation.
D. Dangerous condition; immediate catastrophic dielectric breakdown is imminent.
🟢 C. Questionable or poor condition; indicates moisture contamination or degradation.
🔴 Explanation: The polarization index is calculated by dividing the 10-minute insulation
R10
resistance value by the 1-minute value (P I = R1 ). According to IEEE standards, a PI value
between 1.0 and 2.0 is considered questionable or poor for class B, F, and H insulation
systems, indicating potential moisture ingress, dirt accumulation, or insulation degradation.
Clean, dry insulation systems typically exhibit a PI greater than 2.0.
3. An electrical renovation in a CUNY chemistry laboratory requires the installation of
electrical conduit and fittings within 3 feet of a chemical fume hood exhaust duct
handling highly volatile flammable solvent vapors. Which structural wiring method must
be implemented?
, A. Rigid metal conduit (RMC) with threaded explosion-proof fittings
B. Liquidtight flexible nonmetallic conduit (LFNC) with sealed connectors
C. Electrical metallic tubing (EMT) with compression steel fittings
D. Intermediate metal conduit (IMC) with set-screw couplings
🟢 A. Rigid metal conduit (RMC) with threaded explosion-proof fittings
🔴 Explanation: The area surrounding a chemical fume hood exhaust handling volatile
flammable vapors is classified as a Class I, Division 1 hazardous location according to the
NYC Electrical Code. Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with
threaded joints (at least 5 threads fully engaged) and explosion-proof fittings are strictly
required to contain any internal arcs or sparks and prevent the ignition of external flammable
atmospheres.
4. To ensure appropriate selective coordination in a campus data center, an upstream
circuit breaker must be adjusted so that its overcurrent tripping characteristics do not
overlap with a downstream branch circuit breaker. Which parameter must be precisely
modified on the solid-state trip unit of the upstream breaker?
A. Long-time pickup
B. Short-time delay
C. Instantaneous pickup
D. Ground-fault pickup
🟢 B. Short-time delay
WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST
EXAM UPDATE
*Core Domains*
*• NYC Electrical Code Amendments*
*• National Electrical Code (NEC) Fundamentals*
*• AC/DC Machinery and Motor Control Systems*
*• High-Voltage Distribution and Substation Maintenance*
*• Low-Voltage Fire Alarm and Communication Systems*
*• Hazardous Locations and Specialized CUNY Facilities*
*• Electrical Safety, OSHA Regulations, and PPE Protocols*
*• Troubleshooting, Testing Instruments, and Diagnostics*
*Introduction*
The NYC Electrician (CUNY) Exam is a comprehensive assessment designed to evaluate
the technical competence, regulatory knowledge, and practical decision-making skills of
electrical professionals working within the City University of New York system. This
examination systematically assesses an individual's understanding of the New York City
Electrical Code, foundational electrical theory, complex control diagnostics, and institutional
,safety standards. Consisting of highly structured multiple-choice and complex, scenario-
based operational questions, the exam emphasizes real-world application, critical thinking,
and regulatory compliance. Candidates must demonstrate the ability to analyze sophisticated
electrical layouts, troubleshoot institutional power distribution systems, and maintain safe
working environments in compliance with public safety mandates.
**SECTION ONE**
1. A 3-phase, 460V, 50 HP squirrel-cage induction motor with a design letter B is installed
in a CUNY campus laboratory ventilation system. According to the NYC Electrical
Code, what is the maximum rating of a dual-element, time-delay fuse used for branch-
circuit short-circuit and ground-fault protection?
A. 65 amperes
B. 110 amperes
C. 150 amperes
D. 175 amperes
🟢 B. 110 amperes
🔴 Explanation: Under the NYC Electrical Code (referencing NEC Table 430.252/430.52),
the full-load current (FLC) for a 3-phase, 460V, 50 HP induction motor is 65 amperes. The
,maximum rating for a dual-element time-delay fuse is generally 175% of the motor FLC (
65 × 1.75 = 113.75 amperes). Section 430.52(C)(1) Exception 1 allows the use of the next
standard size fuse down if 175% does not match a standard size, which is 110 amperes.
2. While conducting a routine insulation resistance test on a 4,160V feeder cable
supplying a campus academic building, an electrician records a polarization index (PI)
value of 1.2. How should this condition be evaluated?
A. Excellent condition; the insulation is perfectly dry and flexible.
B. Good condition; typical for standard cross-linked polyethylene insulation.
C. Questionable or poor condition; indicates moisture contamination or degradation.
D. Dangerous condition; immediate catastrophic dielectric breakdown is imminent.
🟢 C. Questionable or poor condition; indicates moisture contamination or degradation.
🔴 Explanation: The polarization index is calculated by dividing the 10-minute insulation
R10
resistance value by the 1-minute value (P I = R1 ). According to IEEE standards, a PI value
between 1.0 and 2.0 is considered questionable or poor for class B, F, and H insulation
systems, indicating potential moisture ingress, dirt accumulation, or insulation degradation.
Clean, dry insulation systems typically exhibit a PI greater than 2.0.
3. An electrical renovation in a CUNY chemistry laboratory requires the installation of
electrical conduit and fittings within 3 feet of a chemical fume hood exhaust duct
handling highly volatile flammable solvent vapors. Which structural wiring method must
be implemented?
, A. Rigid metal conduit (RMC) with threaded explosion-proof fittings
B. Liquidtight flexible nonmetallic conduit (LFNC) with sealed connectors
C. Electrical metallic tubing (EMT) with compression steel fittings
D. Intermediate metal conduit (IMC) with set-screw couplings
🟢 A. Rigid metal conduit (RMC) with threaded explosion-proof fittings
🔴 Explanation: The area surrounding a chemical fume hood exhaust handling volatile
flammable vapors is classified as a Class I, Division 1 hazardous location according to the
NYC Electrical Code. Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with
threaded joints (at least 5 threads fully engaged) and explosion-proof fittings are strictly
required to contain any internal arcs or sparks and prevent the ignition of external flammable
atmospheres.
4. To ensure appropriate selective coordination in a campus data center, an upstream
circuit breaker must be adjusted so that its overcurrent tripping characteristics do not
overlap with a downstream branch circuit breaker. Which parameter must be precisely
modified on the solid-state trip unit of the upstream breaker?
A. Long-time pickup
B. Short-time delay
C. Instantaneous pickup
D. Ground-fault pickup
🟢 B. Short-time delay
