Yukon Electrician Certification Exam Questions
And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. Which of the following is the standard voltage for residential
electrical systems in Yukon?
a) 120/208 V
b) 120/240 V
c) 240/480 V
d) 277/480 V
Residential homes in Yukon typically use a split-phase 120/240 V
system.
2. What is the primary purpose of a ground wire?
a) To supply electricity
b) To prevent overcurrent
c) To provide a path for fault current to reduce shock hazard
d) To increase voltage
A ground wire safely directs stray current to earth, minimizing
electric shock risk.
3. What is the maximum number of current-carrying conductors
allowed in a standard 1-inch conduit without derating?
a) 3
b) 4
c) 5
d) 3
, Exceeding the conductor limit can cause overheating; 3 is the
standard maximum without derating.
4. A 15 A, 120 V branch circuit is protected by a:
a) 20 A breaker
b) 15 A breaker
c) 10 A breaker
d) 30 A breaker
The breaker must match the branch circuit rating to prevent
overcurrent hazards.
5. Which type of wiring method is NOT permitted in wet locations?
a) UF cable
b) NM cable
c) Rigid conduit
d) Liquid-tight flexible conduit
Non-metallic (NM) cable is not rated for wet or damp locations.
6. What is the minimum size copper ground wire for a 100 A service?
a) #6 AWG
b) #8 AWG
c) #4 AWG
d) #8 AWG
Canadian Electrical Code specifies #8 AWG copper for 100 A
services as a grounding conductor.
7. What is the function of a GFCI?
a) Protect against short circuits
b) Protect against overload
c) Protect against ground faults
d) Increase efficiency
, A Ground Fault Circuit Interrupter (GFCI) trips when there is a
difference in current between hot and neutral, preventing shocks.
8. Which conductor color is used for grounding in Canada?
a) Red
b) White
c) Green or bare
d) Black
Ground conductors are always green or bare to distinguish them
from hot and neutral wires.
9. What is the NEC/CEC maximum voltage drop recommended for
branch circuits?
a) 1%
b) 3%
c) 5%
d) 10%
Voltage drop should not exceed 3% for efficiency and safety in
branch circuits.
10. Which device is used to protect transformers and conductors
from overcurrent?
a) Fuse
b) Circuit breaker
c) Contactor
d) Transformer
Circuit breakers automatically interrupt excessive current to
prevent damage.
11. What is the main difference between a Type NM and Type
UF cable?
And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. Which of the following is the standard voltage for residential
electrical systems in Yukon?
a) 120/208 V
b) 120/240 V
c) 240/480 V
d) 277/480 V
Residential homes in Yukon typically use a split-phase 120/240 V
system.
2. What is the primary purpose of a ground wire?
a) To supply electricity
b) To prevent overcurrent
c) To provide a path for fault current to reduce shock hazard
d) To increase voltage
A ground wire safely directs stray current to earth, minimizing
electric shock risk.
3. What is the maximum number of current-carrying conductors
allowed in a standard 1-inch conduit without derating?
a) 3
b) 4
c) 5
d) 3
, Exceeding the conductor limit can cause overheating; 3 is the
standard maximum without derating.
4. A 15 A, 120 V branch circuit is protected by a:
a) 20 A breaker
b) 15 A breaker
c) 10 A breaker
d) 30 A breaker
The breaker must match the branch circuit rating to prevent
overcurrent hazards.
5. Which type of wiring method is NOT permitted in wet locations?
a) UF cable
b) NM cable
c) Rigid conduit
d) Liquid-tight flexible conduit
Non-metallic (NM) cable is not rated for wet or damp locations.
6. What is the minimum size copper ground wire for a 100 A service?
a) #6 AWG
b) #8 AWG
c) #4 AWG
d) #8 AWG
Canadian Electrical Code specifies #8 AWG copper for 100 A
services as a grounding conductor.
7. What is the function of a GFCI?
a) Protect against short circuits
b) Protect against overload
c) Protect against ground faults
d) Increase efficiency
, A Ground Fault Circuit Interrupter (GFCI) trips when there is a
difference in current between hot and neutral, preventing shocks.
8. Which conductor color is used for grounding in Canada?
a) Red
b) White
c) Green or bare
d) Black
Ground conductors are always green or bare to distinguish them
from hot and neutral wires.
9. What is the NEC/CEC maximum voltage drop recommended for
branch circuits?
a) 1%
b) 3%
c) 5%
d) 10%
Voltage drop should not exceed 3% for efficiency and safety in
branch circuits.
10. Which device is used to protect transformers and conductors
from overcurrent?
a) Fuse
b) Circuit breaker
c) Contactor
d) Transformer
Circuit breakers automatically interrupt excessive current to
prevent damage.
11. What is the main difference between a Type NM and Type
UF cable?
