ETCP PORTABLE POWER DISTRIBUTION
TECHNICIAN CERTIFICATION EXAM
QUESTION AND CORRECT
ANSWERS(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. What is the primary purpose of grounding in portable power distribution
systems?
A. Reduce voltage drop
B. Protect equipment from overload
C. Protect personnel from electrical shock
D. Increase current flow
Rationale: Grounding provides a low-resistance path for fault current,
reducing shock risk to personnel.
2. Which device is used to interrupt power when a ground fault is detected?
A. Circuit breaker
B. Fuse
C. GFCI
D. Disconnect switch
Rationale: A GFCI trips when it senses an imbalance between hot and
neutral, indicating a ground fault.
3. What color insulation is typically used for equipment grounding
conductors?
A. Black
B. White
C. Red
, D. Green
Rationale: Green or green/yellow conductors are universally designated
for grounding.
4. In a three-phase system, what is the phase angle between phases?
A. 60°
B. 90°
C. 120°
D. 180°
Rationale: Three-phase power uses 120° separation between phases.
5. What does a feeder cable connect in a portable power system?
A. Load to load
B. Panel to panel
C. Power source to distribution equipment
D. Fixture to fixture
Rationale: Feeder cables deliver power from the source to distro
equipment.
6. Which connector is commonly used for high-current feeder connections in
entertainment power?
A. Edison
B. PowerCON
C. Cam-Lok
D. Twist-lock
Rationale: Cam-Lok connectors are standard for high-current feeder
applications.
7. What is the main hazard of improperly phased feeder cables?
A. Voltage drop
B. Overheating
C. Equipment damage or short circuit
D. Noise interference
Rationale: Incorrect phasing can cause short circuits and severe
equipment damage.
8. What does NEC Article 525 primarily address?
A. Industrial wiring
, B. Healthcare facilities
C. Carnivals, circuses, fairs, and similar events
D. Residential dwellings
Rationale: Article 525 governs temporary power for events and fairs.
9. What is the minimum PPE requirement when working on energized
equipment?
A. Safety shoes only
B. Gloves only
C. Appropriate PPE based on hazard assessment
D. None if trained
Rationale: PPE selection must match the identified electrical hazards.
10.What is the function of a main breaker in a distro?
A. Regulate voltage
B. Balance phases
C. Provide overcurrent protection and disconnect
D. Increase capacity
Rationale: The main breaker protects the system and allows safe
disconnection.
11.Which instrument is used to verify absence of voltage?
A. Clamp meter
B. Voltage tester
C. Megohmmeter
D. Oscilloscope
Rationale: A voltage tester confirms whether conductors are energized.
12.What type of load draws current in pulses rather than smoothly?
A. Resistive
B. Inductive
C. Non-linear
D. Balanced
Rationale: Non-linear loads draw current in pulses, affecting harmonics.
13.Harmonic currents primarily affect which conductor?
A. Phase conductors
B. Ground
TECHNICIAN CERTIFICATION EXAM
QUESTION AND CORRECT
ANSWERS(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A INSTANT
DOWNLOAD PDF
1. What is the primary purpose of grounding in portable power distribution
systems?
A. Reduce voltage drop
B. Protect equipment from overload
C. Protect personnel from electrical shock
D. Increase current flow
Rationale: Grounding provides a low-resistance path for fault current,
reducing shock risk to personnel.
2. Which device is used to interrupt power when a ground fault is detected?
A. Circuit breaker
B. Fuse
C. GFCI
D. Disconnect switch
Rationale: A GFCI trips when it senses an imbalance between hot and
neutral, indicating a ground fault.
3. What color insulation is typically used for equipment grounding
conductors?
A. Black
B. White
C. Red
, D. Green
Rationale: Green or green/yellow conductors are universally designated
for grounding.
4. In a three-phase system, what is the phase angle between phases?
A. 60°
B. 90°
C. 120°
D. 180°
Rationale: Three-phase power uses 120° separation between phases.
5. What does a feeder cable connect in a portable power system?
A. Load to load
B. Panel to panel
C. Power source to distribution equipment
D. Fixture to fixture
Rationale: Feeder cables deliver power from the source to distro
equipment.
6. Which connector is commonly used for high-current feeder connections in
entertainment power?
A. Edison
B. PowerCON
C. Cam-Lok
D. Twist-lock
Rationale: Cam-Lok connectors are standard for high-current feeder
applications.
7. What is the main hazard of improperly phased feeder cables?
A. Voltage drop
B. Overheating
C. Equipment damage or short circuit
D. Noise interference
Rationale: Incorrect phasing can cause short circuits and severe
equipment damage.
8. What does NEC Article 525 primarily address?
A. Industrial wiring
, B. Healthcare facilities
C. Carnivals, circuses, fairs, and similar events
D. Residential dwellings
Rationale: Article 525 governs temporary power for events and fairs.
9. What is the minimum PPE requirement when working on energized
equipment?
A. Safety shoes only
B. Gloves only
C. Appropriate PPE based on hazard assessment
D. None if trained
Rationale: PPE selection must match the identified electrical hazards.
10.What is the function of a main breaker in a distro?
A. Regulate voltage
B. Balance phases
C. Provide overcurrent protection and disconnect
D. Increase capacity
Rationale: The main breaker protects the system and allows safe
disconnection.
11.Which instrument is used to verify absence of voltage?
A. Clamp meter
B. Voltage tester
C. Megohmmeter
D. Oscilloscope
Rationale: A voltage tester confirms whether conductors are energized.
12.What type of load draws current in pulses rather than smoothly?
A. Resistive
B. Inductive
C. Non-linear
D. Balanced
Rationale: Non-linear loads draw current in pulses, affecting harmonics.
13.Harmonic currents primarily affect which conductor?
A. Phase conductors
B. Ground
