TDLR – SIGN ELECTRICIAN EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS |
PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
National Electrical Code (NEC) Article 600 Application
Sign and Outline Lighting Installation Requirements
Grounding, Bonding, and Equipment Grounding Conductors
Overcurrent Protection and Disconnecting Means
TDLR Administrative Rules and Licensing Law
Electrical Theory and Circuit Calculations
Neon Transformers and High-Voltage Secondary Circuits
LED Drivers, Power Supplies, and Class 2 Circuits
Wiring Methods and Materials for Sign Systems
Safety Standards and Professional Ethics
Introduction
The TDLR Sign Electrician Exam assesses the competency of candidates seeking licensure to install, maintain, and repair
electrical signs and outline lighting in Texas. The examination evaluates knowledge of National Electrical Code Article
600, TDLR Administrative Rules, grounding and bonding principles, and safe work practices specific to sign systems.
,Questions are primarily multiple-choice with scenario-based applications requiring critical thinking and real-world
decision-making. Candidates must demonstrate understanding of regulatory compliance, electrical theory, and
practical installation standards to ensure public safety and code-compliant workmanship in the sign industry.
SECTION ONE: QUESTIONS 1–50
Question 1
Each commercial building or occupancy accessible to pedestrians shall be provided with at least one sign outlet at
each entrance, rated at a minimum of:
A. 15 amperes
B. 20 amperes
C. 30 amperes
D. 50 amperes
🟢 Correct Answer: B. 20 amperes
🔴 Explanation: NEC 600.5(A) requires a 20-ampere branch circuit for required sign outlets at commercial building
entrances.
Question 2
,A sign disconnect must be within sight of the sign. If it is not within sight, the disconnect must be:
A. Marked with a red "Danger" sign
B. Permanently bridged
C. Capable of being locked in the open position
D. Installed in a NEMA 3R enclosure
🟢 Correct Answer: C. Capable of being locked in the open position
🔴 Explanation: NEC 600.6(A)(1) permits remote disconnects only if they are lockable and the locking provision
remains in place.
Question 3
What is the maximum rating of a branch circuit supplying a sign consisting of neon tubing?
A. 15 amperes
B. 20 amperes
C. 30 amperes
D. 60 amperes
🟢 Correct Answer: C. 30 amperes
, 🔴 Explanation: NEC 600.5(B)(1) limits branch circuits for neon tubing signs to 30 amperes or less.
Question 4
Metal parts of signs shall be bonded to the:
A. Nearest water pipe
B. Equipment grounding conductor of the branch circuit
C. Neutral conductor
D. Building steel only
🟢 Correct Answer: B. Equipment grounding conductor of the branch circuit
🔴 Explanation: NEC 600.7(B)(1) requires bonding of all metal parts to the equipment grounding conductor.
Question 5
For a field-installed skeleton tubing system, a transformer shall not have a secondary voltage exceeding:
A. 5,000 volts
B. 7,500 volts
C. 15,000 volts
D. 30,000 volts
PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
National Electrical Code (NEC) Article 600 Application
Sign and Outline Lighting Installation Requirements
Grounding, Bonding, and Equipment Grounding Conductors
Overcurrent Protection and Disconnecting Means
TDLR Administrative Rules and Licensing Law
Electrical Theory and Circuit Calculations
Neon Transformers and High-Voltage Secondary Circuits
LED Drivers, Power Supplies, and Class 2 Circuits
Wiring Methods and Materials for Sign Systems
Safety Standards and Professional Ethics
Introduction
The TDLR Sign Electrician Exam assesses the competency of candidates seeking licensure to install, maintain, and repair
electrical signs and outline lighting in Texas. The examination evaluates knowledge of National Electrical Code Article
600, TDLR Administrative Rules, grounding and bonding principles, and safe work practices specific to sign systems.
,Questions are primarily multiple-choice with scenario-based applications requiring critical thinking and real-world
decision-making. Candidates must demonstrate understanding of regulatory compliance, electrical theory, and
practical installation standards to ensure public safety and code-compliant workmanship in the sign industry.
SECTION ONE: QUESTIONS 1–50
Question 1
Each commercial building or occupancy accessible to pedestrians shall be provided with at least one sign outlet at
each entrance, rated at a minimum of:
A. 15 amperes
B. 20 amperes
C. 30 amperes
D. 50 amperes
🟢 Correct Answer: B. 20 amperes
🔴 Explanation: NEC 600.5(A) requires a 20-ampere branch circuit for required sign outlets at commercial building
entrances.
Question 2
,A sign disconnect must be within sight of the sign. If it is not within sight, the disconnect must be:
A. Marked with a red "Danger" sign
B. Permanently bridged
C. Capable of being locked in the open position
D. Installed in a NEMA 3R enclosure
🟢 Correct Answer: C. Capable of being locked in the open position
🔴 Explanation: NEC 600.6(A)(1) permits remote disconnects only if they are lockable and the locking provision
remains in place.
Question 3
What is the maximum rating of a branch circuit supplying a sign consisting of neon tubing?
A. 15 amperes
B. 20 amperes
C. 30 amperes
D. 60 amperes
🟢 Correct Answer: C. 30 amperes
, 🔴 Explanation: NEC 600.5(B)(1) limits branch circuits for neon tubing signs to 30 amperes or less.
Question 4
Metal parts of signs shall be bonded to the:
A. Nearest water pipe
B. Equipment grounding conductor of the branch circuit
C. Neutral conductor
D. Building steel only
🟢 Correct Answer: B. Equipment grounding conductor of the branch circuit
🔴 Explanation: NEC 600.7(B)(1) requires bonding of all metal parts to the equipment grounding conductor.
Question 5
For a field-installed skeleton tubing system, a transformer shall not have a secondary voltage exceeding:
A. 5,000 volts
B. 7,500 volts
C. 15,000 volts
D. 30,000 volts
