TEXAS RESIDENTIAL WIREMAN LICENSE EXAM - (100 QUESTIONS) LATEST UPDATED
ACTUAL EXAM QUESTIONS AND COMPLETE SOLUTIONS | VERIFIED ANSWERS
Examiner/Administrator: Texas Department of Licensing and Regulation (TDLR)
CANDIDATE INFORMATION
Name: ___________________________________________
Candidate ID: ____________________________________
Date: ____________________________________________
Examination Centre: _______________________________
This examination is designed to evaluate the competency, safety awareness, and technical
knowledge required of a Residential Wireman in Texas. It assesses your understanding of
electrical theory, National Electrical Code (NEC) applications, residential wiring methods,
grounding and bonding, load calculations, and safe installation practices. Candidates are
expected to demonstrate practical judgment in real-world residential scenarios while
adhering strictly to code requirements and industry standards. This assessment reflects the
knowledge base necessary for performing electrical work safely and effectively in residential
settings.
CORE COMPETENCY AREAS
, Electrical Theory and Fundamentals
National Electrical Code (NEC) Application
Residential Wiring Methods and Materials
Grounding and Bonding
Load Calculations
Overcurrent Protection
Safety and Compliance
Candidate Instructions: This examination consists of approximately 100 multiple-choice
questions; this section contains the first 30 questions. You are allowed 4 hours to complete
the full examination. Read each question carefully and select the best answer. Only one
answer is correct for each question. Calculators are permitted, but all work must comply with
NEC standards. Marks are awarded for correct answers only; there is no penalty for guessing.
Ensure all responses are clearly marked.
⚠️ DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED
Disclaimer: This is an original simulation designed for educational purposes and is not an
official exam. It is modeled after the format and structure of the Texas Residential Wireman
License Examination.
,Q1. A residential electrician is installing a 120V branch circuit using NM cable in a wood-
framed wall. According to NEC requirements, what is the minimum depth from the face of
the framing member required to avoid physical damage without a nail plate?
A. 1 inch
B. 1.25 inches
C. 1.5 inches
D. 2 inches
Correct Answer: 🔵 B. 1.25 inches
Explanation: 🟢 NEC requires at least 1.25 inches of clearance from the edge of framing
members to protect cables from nails or screws. Option A is insufficient protection. Option
C exceeds the minimum but is not required. Option D is unnecessary and not specified by
code.
Q2. A homeowner requests installation of a GFCI receptacle in a bathroom. What is the
primary purpose of this device?
A. Protect equipment from overload
B. Prevent arc faults
C. Protect people from ground faults
D. Increase circuit capacity
, Correct Answer: 🔵 C. Protect people from ground faults
Explanation: 🟢 GFCIs detect imbalance between hot and neutral currents and protect
against electric shock. Option A relates to breakers. Option B describes AFCIs. Option D is
incorrect; GFCIs do not affect capacity.
Q3. What is the maximum number of 12 AWG conductors allowed in a standard 4-inch
square box with a volume of 21 cubic inches?
A. 7
B. 8
C. 9
D. 10
Correct Answer: 🔵 B. 8
Explanation: 🟢 Each 12 AWG conductor requires 2.25 cubic inches. 21 ÷ 2.25 = 9.33, but
allowances must include device yokes and grounds, reducing usable count to 8. Options C
and D exceed capacity; A underutilizes.
Q4. A 20-amp branch circuit supplies kitchen countertop receptacles. What is the
maximum spacing between receptacles?
A. 4 feet
B. 6 feet
ACTUAL EXAM QUESTIONS AND COMPLETE SOLUTIONS | VERIFIED ANSWERS
Examiner/Administrator: Texas Department of Licensing and Regulation (TDLR)
CANDIDATE INFORMATION
Name: ___________________________________________
Candidate ID: ____________________________________
Date: ____________________________________________
Examination Centre: _______________________________
This examination is designed to evaluate the competency, safety awareness, and technical
knowledge required of a Residential Wireman in Texas. It assesses your understanding of
electrical theory, National Electrical Code (NEC) applications, residential wiring methods,
grounding and bonding, load calculations, and safe installation practices. Candidates are
expected to demonstrate practical judgment in real-world residential scenarios while
adhering strictly to code requirements and industry standards. This assessment reflects the
knowledge base necessary for performing electrical work safely and effectively in residential
settings.
CORE COMPETENCY AREAS
, Electrical Theory and Fundamentals
National Electrical Code (NEC) Application
Residential Wiring Methods and Materials
Grounding and Bonding
Load Calculations
Overcurrent Protection
Safety and Compliance
Candidate Instructions: This examination consists of approximately 100 multiple-choice
questions; this section contains the first 30 questions. You are allowed 4 hours to complete
the full examination. Read each question carefully and select the best answer. Only one
answer is correct for each question. Calculators are permitted, but all work must comply with
NEC standards. Marks are awarded for correct answers only; there is no penalty for guessing.
Ensure all responses are clearly marked.
⚠️ DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED
Disclaimer: This is an original simulation designed for educational purposes and is not an
official exam. It is modeled after the format and structure of the Texas Residential Wireman
License Examination.
,Q1. A residential electrician is installing a 120V branch circuit using NM cable in a wood-
framed wall. According to NEC requirements, what is the minimum depth from the face of
the framing member required to avoid physical damage without a nail plate?
A. 1 inch
B. 1.25 inches
C. 1.5 inches
D. 2 inches
Correct Answer: 🔵 B. 1.25 inches
Explanation: 🟢 NEC requires at least 1.25 inches of clearance from the edge of framing
members to protect cables from nails or screws. Option A is insufficient protection. Option
C exceeds the minimum but is not required. Option D is unnecessary and not specified by
code.
Q2. A homeowner requests installation of a GFCI receptacle in a bathroom. What is the
primary purpose of this device?
A. Protect equipment from overload
B. Prevent arc faults
C. Protect people from ground faults
D. Increase circuit capacity
, Correct Answer: 🔵 C. Protect people from ground faults
Explanation: 🟢 GFCIs detect imbalance between hot and neutral currents and protect
against electric shock. Option A relates to breakers. Option B describes AFCIs. Option D is
incorrect; GFCIs do not affect capacity.
Q3. What is the maximum number of 12 AWG conductors allowed in a standard 4-inch
square box with a volume of 21 cubic inches?
A. 7
B. 8
C. 9
D. 10
Correct Answer: 🔵 B. 8
Explanation: 🟢 Each 12 AWG conductor requires 2.25 cubic inches. 21 ÷ 2.25 = 9.33, but
allowances must include device yokes and grounds, reducing usable count to 8. Options C
and D exceed capacity; A underutilizes.
Q4. A 20-amp branch circuit supplies kitchen countertop receptacles. What is the
maximum spacing between receptacles?
A. 4 feet
B. 6 feet
