Northwest Territories Electrician Certification
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of the Canadian Electrical Code
(CEC)?
a) To increase electricity rates
b) To provide a design guide only
c) To ensure electrical safety
d) To regulate electrical utility companies
The CEC sets standards for electrical installations to prevent fire,
shock, and other hazards.
2. In a three-phase system, the voltage between two line conductors
is 208V. What is the voltage between a line and neutral?
a) 208V
b) 120V
c) 240V
d) 2080V
Line-to-neutral voltage is line-to-line voltage divided by √3 (208 ÷
1.732 ≈ 120V).
3. Which conductor colour is typically used for grounding in Canada?
a) White
b) Black
c) Red
, d) Green or bare
Grounding conductors are green or bare to distinguish them from
hot and neutral wires.
4. What device protects a circuit from short circuits and overloads?
a) Switch
b) Circuit breaker
c) Transformer
d) Contactor
Circuit breakers interrupt current flow when a fault is detected,
protecting the wiring and devices.
5. What is the minimum bending radius for a rigid metal conduit
(RMC) 1 inch in diameter?
a) 4 inches
b) 6 inches
c) 12 inches
d) 24 inches
The CEC requires a minimum bend radius of 12 times the conduit
diameter for RMC to prevent conductor damage.
6. Which type of current is supplied by a standard Canadian utility?
a) Direct current
b) Alternating current
c) Pulsating DC
d) Constant voltage AC
Utilities supply AC because it is more efficient for transmission over
long distances.
7. What is the purpose of an equipment grounding conductor?
a) To carry normal current
, b) To increase voltage
c) To provide a path to ground for fault current
d) To regulate frequency
Grounding conductors allow fault currents to safely return to
ground, preventing shock hazards.
8. What is the typical voltage for a single-phase residential service in
Canada?
a) 208V
b) 240V
c) 120/240V
d) 600V
Residential services usually provide 120V for lighting/outlets and
240V for major appliances.
9. Which type of wire is suitable for wet locations?
a) NM-B
b) UF-B
c) THWN
d) NMD90
THWN conductors are rated for wet and dry conditions; NM-B is
only for dry locations.
10. A GFCI (Ground Fault Circuit Interrupter) trips when:
a) The voltage is too high
b) The current is too low
c) Current leakage to ground exceeds 5 mA
d) A short circuit occurs
GFCIs protect people from electrical shock by sensing small
leakage currents to ground.
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of the Canadian Electrical Code
(CEC)?
a) To increase electricity rates
b) To provide a design guide only
c) To ensure electrical safety
d) To regulate electrical utility companies
The CEC sets standards for electrical installations to prevent fire,
shock, and other hazards.
2. In a three-phase system, the voltage between two line conductors
is 208V. What is the voltage between a line and neutral?
a) 208V
b) 120V
c) 240V
d) 2080V
Line-to-neutral voltage is line-to-line voltage divided by √3 (208 ÷
1.732 ≈ 120V).
3. Which conductor colour is typically used for grounding in Canada?
a) White
b) Black
c) Red
, d) Green or bare
Grounding conductors are green or bare to distinguish them from
hot and neutral wires.
4. What device protects a circuit from short circuits and overloads?
a) Switch
b) Circuit breaker
c) Transformer
d) Contactor
Circuit breakers interrupt current flow when a fault is detected,
protecting the wiring and devices.
5. What is the minimum bending radius for a rigid metal conduit
(RMC) 1 inch in diameter?
a) 4 inches
b) 6 inches
c) 12 inches
d) 24 inches
The CEC requires a minimum bend radius of 12 times the conduit
diameter for RMC to prevent conductor damage.
6. Which type of current is supplied by a standard Canadian utility?
a) Direct current
b) Alternating current
c) Pulsating DC
d) Constant voltage AC
Utilities supply AC because it is more efficient for transmission over
long distances.
7. What is the purpose of an equipment grounding conductor?
a) To carry normal current
, b) To increase voltage
c) To provide a path to ground for fault current
d) To regulate frequency
Grounding conductors allow fault currents to safely return to
ground, preventing shock hazards.
8. What is the typical voltage for a single-phase residential service in
Canada?
a) 208V
b) 240V
c) 120/240V
d) 600V
Residential services usually provide 120V for lighting/outlets and
240V for major appliances.
9. Which type of wire is suitable for wet locations?
a) NM-B
b) UF-B
c) THWN
d) NMD90
THWN conductors are rated for wet and dry conditions; NM-B is
only for dry locations.
10. A GFCI (Ground Fault Circuit Interrupter) trips when:
a) The voltage is too high
b) The current is too low
c) Current leakage to ground exceeds 5 mA
d) A short circuit occurs
GFCIs protect people from electrical shock by sensing small
leakage currents to ground.
