Journeyman Electrician Practice Test
(Latest 2026/2027 Update) 100% Verified
Actual Exam Questions & Answers | Grade
A
This Journeyman Electrician Practice Test: 50 Practice Questions &
Answers is a targeted study tool. It helps apprentice electricians pass state
licensing exams. This resource covers essential National Electrical Code (NEC)
standards, electrical theory, and complex math formulas.
Why Electricians Need This
Passing a Journeyman exam is hard. Most official tests have a strict time limit and
require a passing score of 70% or higher.
• Realistic Mock Exam: 50 questions exactly match the style of state and
local board tests.
• Detailed Explanations: Every question includes the exact answer per
NEC code reference.
• Builds Speed: Practicing under a timer prevents test anxiety.
Core Topics Tested
The practice questions focus on the core rules and calculations an electrician
faces on the job:
• Electrical Math: Solving for power (P) and current (I) using formulas like
Ohm's Law (\(I = \frac{V}{R}\)).
• Load Calculations: Figuring out the total electrical load for a home or
business.
• Wiring & Sizing: Choosing the right wire size (AWG) and conduit size
for different loads.
• Safety & Grounding: Applying safety rules for transformers, motors, and
grounding systems.
1
, Real-World Example
On the job, an electrician must figure out how much power a building will use.
The practice test helps you solve these problems before doing them in real life.
For example, a question might ask to find the current (I) in a 120 volt circuit that
has a total resistance (R) of 10 ohms. You would use the formula
Mastering this 50-question test proves you have the skills to work as a licensed
Journeyman.
Quiz_________________?
Conductors with _____ marked on the insulation are NOT approved for use in a
wet location. -
Answer
THHN
conductors with THHN insulation are approved for use in dry and damp locations
only and conductors with THWN, THHW, and THW insulation are recognized
for use in dry and wet locations.
Quiz_________________?
Given: A one-family dwelling unit with a demand load of 200 amperes is supplied
with a 120/240 volt, single-phase, electrical system from the local utility company.
What is the MINIMUM size aluminum THW conductors required for use as
service-entrance conductors for this residence? -
Answer
4/0 AWG
2
, one-family dwelling 120/240 volt, single-phase, service-entrance conductors to be
sized at an ampacity of not less than 83% of the service rating. Therefore, 200
amperes x 83% = 166 amperes; size 4/0 AWG THW aluminum conductors with
an allowable ampacity of 180 amperes should be selected for this dwelling.
Quiz_________________?
Where a 150 kVA, single-phase transformer having a secondary voltage of
120/240 is installed at a multi-family dwelling, the full-load current rating, in
amperes, of the secondary is _____. -
Answer
625 amperes
To find the full-load current rating of the single-phase transformer apply the
single-phase current formula as shown:I = (150 kVA x 1000) / 240 volts =
15,000/240 = 625 amperes
Quiz_________________?
Which one of the following listed circuit breakers is NOT a standard ampere
rating? -
Answer
75 amperes
the standard ampere ratings for fuses and circuit breakers. A circuit breaker with
an ampere rating of 75 amperes is not a standard ampere rating.
3
(Latest 2026/2027 Update) 100% Verified
Actual Exam Questions & Answers | Grade
A
This Journeyman Electrician Practice Test: 50 Practice Questions &
Answers is a targeted study tool. It helps apprentice electricians pass state
licensing exams. This resource covers essential National Electrical Code (NEC)
standards, electrical theory, and complex math formulas.
Why Electricians Need This
Passing a Journeyman exam is hard. Most official tests have a strict time limit and
require a passing score of 70% or higher.
• Realistic Mock Exam: 50 questions exactly match the style of state and
local board tests.
• Detailed Explanations: Every question includes the exact answer per
NEC code reference.
• Builds Speed: Practicing under a timer prevents test anxiety.
Core Topics Tested
The practice questions focus on the core rules and calculations an electrician
faces on the job:
• Electrical Math: Solving for power (P) and current (I) using formulas like
Ohm's Law (\(I = \frac{V}{R}\)).
• Load Calculations: Figuring out the total electrical load for a home or
business.
• Wiring & Sizing: Choosing the right wire size (AWG) and conduit size
for different loads.
• Safety & Grounding: Applying safety rules for transformers, motors, and
grounding systems.
1
, Real-World Example
On the job, an electrician must figure out how much power a building will use.
The practice test helps you solve these problems before doing them in real life.
For example, a question might ask to find the current (I) in a 120 volt circuit that
has a total resistance (R) of 10 ohms. You would use the formula
Mastering this 50-question test proves you have the skills to work as a licensed
Journeyman.
Quiz_________________?
Conductors with _____ marked on the insulation are NOT approved for use in a
wet location. -
Answer
THHN
conductors with THHN insulation are approved for use in dry and damp locations
only and conductors with THWN, THHW, and THW insulation are recognized
for use in dry and wet locations.
Quiz_________________?
Given: A one-family dwelling unit with a demand load of 200 amperes is supplied
with a 120/240 volt, single-phase, electrical system from the local utility company.
What is the MINIMUM size aluminum THW conductors required for use as
service-entrance conductors for this residence? -
Answer
4/0 AWG
2
, one-family dwelling 120/240 volt, single-phase, service-entrance conductors to be
sized at an ampacity of not less than 83% of the service rating. Therefore, 200
amperes x 83% = 166 amperes; size 4/0 AWG THW aluminum conductors with
an allowable ampacity of 180 amperes should be selected for this dwelling.
Quiz_________________?
Where a 150 kVA, single-phase transformer having a secondary voltage of
120/240 is installed at a multi-family dwelling, the full-load current rating, in
amperes, of the secondary is _____. -
Answer
625 amperes
To find the full-load current rating of the single-phase transformer apply the
single-phase current formula as shown:I = (150 kVA x 1000) / 240 volts =
15,000/240 = 625 amperes
Quiz_________________?
Which one of the following listed circuit breakers is NOT a standard ampere
rating? -
Answer
75 amperes
the standard ampere ratings for fuses and circuit breakers. A circuit breaker with
an ampere rating of 75 amperes is not a standard ampere rating.
3
