MASSACHUSETTS JOURNEYMAN ELECTRICIAN EXAM –
QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED
PASS | LATEST EXAM UPDATE
CORE DOMAINS
Electrical Theory and Calculations
Massachusetts Electrical Code (MEC) Amendments
National Electrical Code (NEC) Requirements
Grounding and Bonding
Branch Circuits and Feeders
Motors and Controls
Transformers and Equipment
Life Safety and Fire Alarm Systems
INTRODUCTION
The purpose of this exam is to rigorously evaluate the
competency of candidates seeking the Massachusetts
Journeyman Electrician license. This assessment measures a
candidate's mastery of the National Electrical Code as amended
by the Massachusetts Electrical Code (527 CMR 12.00). The exam
,covers a broad spectrum of skills, including complex load
calculations, the proper selection of materials, and the
application of safety standards in residential, commercial, and
industrial settings. Utilizing both multiple-choice questions and
scenario-based problems, the exam emphasizes real-world
application, critical thinking, and regulatory compliance. It
ensures that every licensed journeyman possesses the technical
expertise and ethical judgment necessary to protect the public
from the hazards arising from the use of electricity.
SECTION ONE: QUESTIONS 1–100
1. A 240-volt single-phase branch circuit supplies a
continuous load of 40 amperes. What is the minimum size
Copper THHN conductor required for this circuit?
A. 10 AWG
B. 8 AWG
C. 6 AWG
D. 4 AWG
🟢 B. 8 AWG
,🔴 Explanation: Continuous loads must be calculated at 125%
of the load (40A x 1.25 = 50A). According to Table 310.16, an 8
AWG Copper THHN conductor is rated for 55A at 90°C, but
terminal temperature limitations usually restrict it to 50A at
75°C, making it the minimum requirement.
2. In Massachusetts, what is the maximum number of
disconnects permitted to be grouped in one location for a
service?
A. 2
B. 4
C. 6
D. 8
🟢 C. 6
🔴 Explanation: Per NEC 230.71, the service disconnecting
means for each service shall consist of not more than six
switches or six circuit breakers mounted in a single enclosure or
in a group of separate enclosures.
3. Which of the following is the required clear working space
depth for equipment operating at 480 volts to ground
, where there are exposed live parts on one side and
grounded parts on the other (Condition 2)?
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 5 feet
🟢 B. 3.5 feet
🔴 Explanation: Table 110.26(A)(1) specifies that for Condition 2
(Live parts on one side and grounded parts on the other) at a
voltage of 151-600V to ground, the minimum clear distance is
3.5 feet.
4. A residential kitchen counter is 8 feet long. What is the
minimum number of small-appliance branch circuits
required to serve the receptacle outlets in this area?
A. 1
B. 2
C. 3
D. 4
🟢 B. 2
QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED
PASS | LATEST EXAM UPDATE
CORE DOMAINS
Electrical Theory and Calculations
Massachusetts Electrical Code (MEC) Amendments
National Electrical Code (NEC) Requirements
Grounding and Bonding
Branch Circuits and Feeders
Motors and Controls
Transformers and Equipment
Life Safety and Fire Alarm Systems
INTRODUCTION
The purpose of this exam is to rigorously evaluate the
competency of candidates seeking the Massachusetts
Journeyman Electrician license. This assessment measures a
candidate's mastery of the National Electrical Code as amended
by the Massachusetts Electrical Code (527 CMR 12.00). The exam
,covers a broad spectrum of skills, including complex load
calculations, the proper selection of materials, and the
application of safety standards in residential, commercial, and
industrial settings. Utilizing both multiple-choice questions and
scenario-based problems, the exam emphasizes real-world
application, critical thinking, and regulatory compliance. It
ensures that every licensed journeyman possesses the technical
expertise and ethical judgment necessary to protect the public
from the hazards arising from the use of electricity.
SECTION ONE: QUESTIONS 1–100
1. A 240-volt single-phase branch circuit supplies a
continuous load of 40 amperes. What is the minimum size
Copper THHN conductor required for this circuit?
A. 10 AWG
B. 8 AWG
C. 6 AWG
D. 4 AWG
🟢 B. 8 AWG
,🔴 Explanation: Continuous loads must be calculated at 125%
of the load (40A x 1.25 = 50A). According to Table 310.16, an 8
AWG Copper THHN conductor is rated for 55A at 90°C, but
terminal temperature limitations usually restrict it to 50A at
75°C, making it the minimum requirement.
2. In Massachusetts, what is the maximum number of
disconnects permitted to be grouped in one location for a
service?
A. 2
B. 4
C. 6
D. 8
🟢 C. 6
🔴 Explanation: Per NEC 230.71, the service disconnecting
means for each service shall consist of not more than six
switches or six circuit breakers mounted in a single enclosure or
in a group of separate enclosures.
3. Which of the following is the required clear working space
depth for equipment operating at 480 volts to ground
, where there are exposed live parts on one side and
grounded parts on the other (Condition 2)?
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 5 feet
🟢 B. 3.5 feet
🔴 Explanation: Table 110.26(A)(1) specifies that for Condition 2
(Live parts on one side and grounded parts on the other) at a
voltage of 151-600V to ground, the minimum clear distance is
3.5 feet.
4. A residential kitchen counter is 8 feet long. What is the
minimum number of small-appliance branch circuits
required to serve the receptacle outlets in this area?
A. 1
B. 2
C. 3
D. 4
🟢 B. 2
