Texas Master Sign Electrician Practice
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the minimum burial depth for a PVC conduit used for a 120V
sign circuit under a commercial parking lot?
A. 6 inches
B. 12 inches
C. 24 inches
D. 30 inches
PVC conduit under commercial driveways must be buried at a
minimum of 24 inches per NEC Table 300.5.
2. Which of the following signs does not require a disconnecting means?
A. Freestanding sign
B. Wall-mounted sign
C. None; all signs require a disconnect
D. Portable sign
NEC 600.6 requires a disconnecting means for all signs, regardless of
type.
3. The disconnecting means for a sign must be within how many feet of
the sign?
A. 3 feet
, B. 5 feet
C. 6 feet
D. 10 feet
NEC 600.6(A)(1) requires the disconnecting means to be within sight
and within 6 feet of the sign.
4. In outdoor wet locations, electrical boxes used for sign installations
must be:
A. Type 1 rated
B. Plastic only
C. Listed for wet locations
D. Non-metallic only
Boxes must be listed and labeled for wet locations per NEC 314.
5. The minimum ampacity of branch-circuit conductors supplying a sign
shall be:
A. 100% of the sign load
B. 125% of the sign load
C. 150% of the sign load
D. 175% of the sign load
Per NEC 600.5(C)(2), conductors must have ampacity not less than
125% of the sign load.
6. Which wire color is prohibited for ungrounded conductors in a
120/240V sign system?
A. Red
B. White
C. Black
D. Blue
White is reserved for grounded conductors; it cannot be used for hot
wires.
, 7. Flexible cords for signs shall be:
A. Type NM
B. Hard usage rated
C. Low voltage
D. Indoor only
Flexible cords must be rated for hard usage (e.g., Types S, SO) per
NEC 600.10.
8. The minimum conductor size for sign branch circuits is:
A. 16 AWG
B. 14 AWG
C. 12 AWG
D. 10 AWG
NEC 600.5(B) specifies a minimum of 12 AWG for sign branch circuits.
9. What is the NEC article that specifically addresses electric signs?
A. 310
B. 600
C. 725
D. 410
Article 600 of the NEC governs installation requirements for signs and
outline lighting.
10. A Class 2 transformer used in a sign must be:
A. 150 VA
B. 200 VA
C. 100 VA or less
D. 300 VA
Class 2 circuits are limited to 100 VA by NEC 725.
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the minimum burial depth for a PVC conduit used for a 120V
sign circuit under a commercial parking lot?
A. 6 inches
B. 12 inches
C. 24 inches
D. 30 inches
PVC conduit under commercial driveways must be buried at a
minimum of 24 inches per NEC Table 300.5.
2. Which of the following signs does not require a disconnecting means?
A. Freestanding sign
B. Wall-mounted sign
C. None; all signs require a disconnect
D. Portable sign
NEC 600.6 requires a disconnecting means for all signs, regardless of
type.
3. The disconnecting means for a sign must be within how many feet of
the sign?
A. 3 feet
, B. 5 feet
C. 6 feet
D. 10 feet
NEC 600.6(A)(1) requires the disconnecting means to be within sight
and within 6 feet of the sign.
4. In outdoor wet locations, electrical boxes used for sign installations
must be:
A. Type 1 rated
B. Plastic only
C. Listed for wet locations
D. Non-metallic only
Boxes must be listed and labeled for wet locations per NEC 314.
5. The minimum ampacity of branch-circuit conductors supplying a sign
shall be:
A. 100% of the sign load
B. 125% of the sign load
C. 150% of the sign load
D. 175% of the sign load
Per NEC 600.5(C)(2), conductors must have ampacity not less than
125% of the sign load.
6. Which wire color is prohibited for ungrounded conductors in a
120/240V sign system?
A. Red
B. White
C. Black
D. Blue
White is reserved for grounded conductors; it cannot be used for hot
wires.
, 7. Flexible cords for signs shall be:
A. Type NM
B. Hard usage rated
C. Low voltage
D. Indoor only
Flexible cords must be rated for hard usage (e.g., Types S, SO) per
NEC 600.10.
8. The minimum conductor size for sign branch circuits is:
A. 16 AWG
B. 14 AWG
C. 12 AWG
D. 10 AWG
NEC 600.5(B) specifies a minimum of 12 AWG for sign branch circuits.
9. What is the NEC article that specifically addresses electric signs?
A. 310
B. 600
C. 725
D. 410
Article 600 of the NEC governs installation requirements for signs and
outline lighting.
10. A Class 2 transformer used in a sign must be:
A. 150 VA
B. 200 VA
C. 100 VA or less
D. 300 VA
Class 2 circuits are limited to 100 VA by NEC 725.
