Texas Electrical Sign Contractor
Examination Practice Exam 2026 | 100
Questions & Answers with Detailed
Rationales | Complete Exam Prep &
Study Guide
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Reduce construction costs
B. Standardize electrical equipment brands
C. Provide minimum requirements for safe electrical installations
D. Increase electrical capacity
Answer: Provide minimum requirements for safe electrical installations
Rationale: The NEC establishes minimum safety standards designed to protect
people and property from electrical hazards.
2. Which NEC article primarily covers signs and outline lighting?
A. Article 220
B. Article 250
C. Article 600
D. Article 430
,Answer: Article 600
Rationale: NEC Article 600 specifically governs electric signs and outline lighting
systems.
3. What does a listed sign indicate?
A. It is decorative only.
B. It has been evaluated by a recognized testing laboratory.
C. It requires no inspection.
D. It is exempt from the NEC.
Answer: It has been evaluated by a recognized testing laboratory.
Rationale: Listed equipment has been tested and found to comply with
applicable safety standards.
4. Which conductor is intentionally connected to earth?
A. Ungrounded conductor
B. Equipment grounding conductor
C. Traveler conductor
D. Grounded conductor
Answer: Grounded conductor
Rationale: The grounded conductor (neutral) is intentionally connected to earth
at the service.
5. What color commonly identifies the equipment grounding conductor?
A. Black
B. Red
C. White
D. Green
,Answer: Green
Rationale: Green or bare conductors identify equipment grounding conductors.
6. What device protects conductors from excessive current?
A. Relay
B. Contactor
C. Overcurrent protective device
D. Transformer
Answer: Overcurrent protective device
Rationale: Fuses and circuit breakers protect wiring from overloads and short
circuits.
7. Which instrument measures voltage?
A. Ammeter
B. Ohmmeter
C. Wattmeter
D. Voltmeter
Answer: Voltmeter
Rationale: Voltmeters measure electrical potential difference between two
points.
8. Ohm's Law states that voltage equals:
A. Current ÷ Resistance
B. Resistance × Power
C. Current × Resistance
D. Power × Current
, Answer: Current × Resistance
Rationale: Ohm's Law is expressed as V = I × R.
9. What is electrical continuity?
A. Voltage increase
B. An unbroken electrical path
C. High resistance
D. Ground fault
Answer: An unbroken electrical path
Rationale: Continuity allows current to flow through a complete circuit.
10.Which material is commonly used for grounding electrodes?
A. Plastic
B. PVC
C. Wood
D. Copper-clad steel
Answer: Copper-clad steel
Rationale: Copper-clad steel rods provide durability and corrosion resistance.
11.Which conductor normally carries load current back to the source?
A. Ground wire
B. Bonding jumper
C. Neutral conductor
D. Equipment grounding conductor
Answer: Neutral conductor
Examination Practice Exam 2026 | 100
Questions & Answers with Detailed
Rationales | Complete Exam Prep &
Study Guide
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Reduce construction costs
B. Standardize electrical equipment brands
C. Provide minimum requirements for safe electrical installations
D. Increase electrical capacity
Answer: Provide minimum requirements for safe electrical installations
Rationale: The NEC establishes minimum safety standards designed to protect
people and property from electrical hazards.
2. Which NEC article primarily covers signs and outline lighting?
A. Article 220
B. Article 250
C. Article 600
D. Article 430
,Answer: Article 600
Rationale: NEC Article 600 specifically governs electric signs and outline lighting
systems.
3. What does a listed sign indicate?
A. It is decorative only.
B. It has been evaluated by a recognized testing laboratory.
C. It requires no inspection.
D. It is exempt from the NEC.
Answer: It has been evaluated by a recognized testing laboratory.
Rationale: Listed equipment has been tested and found to comply with
applicable safety standards.
4. Which conductor is intentionally connected to earth?
A. Ungrounded conductor
B. Equipment grounding conductor
C. Traveler conductor
D. Grounded conductor
Answer: Grounded conductor
Rationale: The grounded conductor (neutral) is intentionally connected to earth
at the service.
5. What color commonly identifies the equipment grounding conductor?
A. Black
B. Red
C. White
D. Green
,Answer: Green
Rationale: Green or bare conductors identify equipment grounding conductors.
6. What device protects conductors from excessive current?
A. Relay
B. Contactor
C. Overcurrent protective device
D. Transformer
Answer: Overcurrent protective device
Rationale: Fuses and circuit breakers protect wiring from overloads and short
circuits.
7. Which instrument measures voltage?
A. Ammeter
B. Ohmmeter
C. Wattmeter
D. Voltmeter
Answer: Voltmeter
Rationale: Voltmeters measure electrical potential difference between two
points.
8. Ohm's Law states that voltage equals:
A. Current ÷ Resistance
B. Resistance × Power
C. Current × Resistance
D. Power × Current
, Answer: Current × Resistance
Rationale: Ohm's Law is expressed as V = I × R.
9. What is electrical continuity?
A. Voltage increase
B. An unbroken electrical path
C. High resistance
D. Ground fault
Answer: An unbroken electrical path
Rationale: Continuity allows current to flow through a complete circuit.
10.Which material is commonly used for grounding electrodes?
A. Plastic
B. PVC
C. Wood
D. Copper-clad steel
Answer: Copper-clad steel
Rationale: Copper-clad steel rods provide durability and corrosion resistance.
11.Which conductor normally carries load current back to the source?
A. Ground wire
B. Bonding jumper
C. Neutral conductor
D. Equipment grounding conductor
Answer: Neutral conductor
