TEXAS MASTER ELECTRICIAN EXAM – PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
CORE DOMAINS
• NEC Definitions and Calculations
• Services, Feeders, and Branch Circuits
• Grounding and Bonding
• Conductors and Overcurrent Protection
• Motors and Controllers
• Special Occupancies and Equipment
• General Design and Installation
• Texas State Laws and Rules
• Safety and Renewable Energy Systems
INTRODUCTION
The purpose of this practice assessment is to prepare candidates for the Texas Master
Electrician Examination by simulating the rigorous standards of the state licensing board.
This exam evaluates advanced skills in electrical theory, complex mathematical
calculations, and comprehensive knowledge of the National Electrical Code. The
assessment features a combination of multiple-choice and scenario-based questions
designed to test a candidate's ability to apply regulatory standards to real-world
industrial, commercial, and residential settings. Success requires critical thinking and the
ability to make high-level technical decisions regarding safety, installation efficiency, and
legal compliance within the electrical trade.
,SECTION ONE: QUESTIONS 1–100
1. What is the maximum number of disconnects allowed at the main service for a
single building, excluding exceptions for fire pumps?
A. Two
B. Four
C. Six
D. Eight
🟢 C. Six
🔴 RATIONALE: Per NEC 230.71, the service disconnecting means for each service
permitted by 230.2 shall consist of not more than six switches or six circuit breakers
mounted in a single enclosure or in a group of separate enclosures.
2. A 3-phase, 460V, 50 HP code letter G motor is started across the line. What is the
maximum setting for an instantaneous trip circuit breaker if the motor fails to
start at the initial setting?
A. 700%
B. 800%
C. 1100%
D. 1700%
🟢 D. 1700%
🔴 RATIONALE: According to Table 430.52, the initial setting is 800%. However,
430.52(C)(3) Exception 1 allows the setting to be increased up to 1700% for Design B,
C, or D motors if the initial setting is insufficient.
, 3. Under the Texas Electrician Administrative Rules, how many hours of continuing
education must a Master Electrician complete annually for license renewal?
A. 4 hours
B. 8 hours
C. 12 hours
D. 24 hours
🟢 A. 4 hours
🔴 RATIONALE: Texas Department of Licensing and Regulation (TDLR) rules specify
that electricians must complete four hours of approved continuing education within
the term of the license to be eligible for renewal.
4. What is the minimum burial depth for a rigid metal conduit (RMC) installed
under a driveway of a one-family dwelling?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
🟢 C. 18 inches
🔴 RATIONALE: Table 300.5 specifies that for residential driveways and outdoor
parking areas used only for dwelling purposes, the minimum cover for RMC is 18
inches.
5. A feeder supplies a total non-continuous load of 150A and a continuous load of
100A. What is the minimum ampacity required for the feeder conductors?
, A. 250A
B. 275A
C. 312A
D. 325A
🟢 B. 275A
🔴 RATIONALE: NEC 215.2(A)(1) requires feeder conductors to be sized at 100% of the
non-continuous load plus 125% of the continuous load (150 + (100 x 1.25) = 275A).
6. Which of the following is the standard color for the high-leg conductor in a 4-
wire, delta-connected system where the midpoint of one phase winding is
grounded?
A. Red
B. Black
C. Orange
D. Blue
🟢 C. Orange
🔴 RATIONALE: NEC 110.15 requires that on a 4-wire, delta-connected system where
the midpoint of one phase winding is grounded, the conductor or busbar having the
higher voltage to ground shall be durably and permanently marked by an outer finish
that is orange in color.
7. What is the minimum size copper grounding electrode conductor for a service
with 500 kcmil copper service-entrance conductors?
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
CORE DOMAINS
• NEC Definitions and Calculations
• Services, Feeders, and Branch Circuits
• Grounding and Bonding
• Conductors and Overcurrent Protection
• Motors and Controllers
• Special Occupancies and Equipment
• General Design and Installation
• Texas State Laws and Rules
• Safety and Renewable Energy Systems
INTRODUCTION
The purpose of this practice assessment is to prepare candidates for the Texas Master
Electrician Examination by simulating the rigorous standards of the state licensing board.
This exam evaluates advanced skills in electrical theory, complex mathematical
calculations, and comprehensive knowledge of the National Electrical Code. The
assessment features a combination of multiple-choice and scenario-based questions
designed to test a candidate's ability to apply regulatory standards to real-world
industrial, commercial, and residential settings. Success requires critical thinking and the
ability to make high-level technical decisions regarding safety, installation efficiency, and
legal compliance within the electrical trade.
,SECTION ONE: QUESTIONS 1–100
1. What is the maximum number of disconnects allowed at the main service for a
single building, excluding exceptions for fire pumps?
A. Two
B. Four
C. Six
D. Eight
🟢 C. Six
🔴 RATIONALE: Per NEC 230.71, the service disconnecting means for each service
permitted by 230.2 shall consist of not more than six switches or six circuit breakers
mounted in a single enclosure or in a group of separate enclosures.
2. A 3-phase, 460V, 50 HP code letter G motor is started across the line. What is the
maximum setting for an instantaneous trip circuit breaker if the motor fails to
start at the initial setting?
A. 700%
B. 800%
C. 1100%
D. 1700%
🟢 D. 1700%
🔴 RATIONALE: According to Table 430.52, the initial setting is 800%. However,
430.52(C)(3) Exception 1 allows the setting to be increased up to 1700% for Design B,
C, or D motors if the initial setting is insufficient.
, 3. Under the Texas Electrician Administrative Rules, how many hours of continuing
education must a Master Electrician complete annually for license renewal?
A. 4 hours
B. 8 hours
C. 12 hours
D. 24 hours
🟢 A. 4 hours
🔴 RATIONALE: Texas Department of Licensing and Regulation (TDLR) rules specify
that electricians must complete four hours of approved continuing education within
the term of the license to be eligible for renewal.
4. What is the minimum burial depth for a rigid metal conduit (RMC) installed
under a driveway of a one-family dwelling?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
🟢 C. 18 inches
🔴 RATIONALE: Table 300.5 specifies that for residential driveways and outdoor
parking areas used only for dwelling purposes, the minimum cover for RMC is 18
inches.
5. A feeder supplies a total non-continuous load of 150A and a continuous load of
100A. What is the minimum ampacity required for the feeder conductors?
, A. 250A
B. 275A
C. 312A
D. 325A
🟢 B. 275A
🔴 RATIONALE: NEC 215.2(A)(1) requires feeder conductors to be sized at 100% of the
non-continuous load plus 125% of the continuous load (150 + (100 x 1.25) = 275A).
6. Which of the following is the standard color for the high-leg conductor in a 4-
wire, delta-connected system where the midpoint of one phase winding is
grounded?
A. Red
B. Black
C. Orange
D. Blue
🟢 C. Orange
🔴 RATIONALE: NEC 110.15 requires that on a 4-wire, delta-connected system where
the midpoint of one phase winding is grounded, the conductor or busbar having the
higher voltage to ground shall be durably and permanently marked by an outer finish
that is orange in color.
7. What is the minimum size copper grounding electrode conductor for a service
with 500 kcmil copper service-entrance conductors?
