TL;DR
Learn lighting system design, installation requirements, and energy efficiency standards. Lighting installations have specific NEC requirements and are tested on electrician exams.
Free Signs & Outline Lighting (Art. 600) Practice Questions
Master Electrician License Exam · Special Equipment
This module covers Signs & Outline Lighting (Art. 600) as part of the Special Equipment section, testing your understanding of core concepts and their practical application.
| Exam | Master Electrician License Exam |
| Pass Rate | 45% |
| Duration | 300 minutes |
| Module | Signs & Outline Lighting (Art. 600) |
Why Signs & Outline Lighting (Art. 600) matters
Signs & Outline Lighting (Art. 600) is a commonly tested topic on the Master Electrician License Exam because it covers fundamental knowledge required for competent professional practice.
Sample Practice Questions (5)
1. A commercial building has three separate neon signs on the facade, each supplied by its own transformer. Per NEC 600.6, how many disconnects are required?
- One disconnect per sign — three total, each within sight of its respective sign or lockable in the open position
- One disconnect for all three signs combined
- Three disconnects all located at the service panel
- No disconnect is required for neon signs under 100 watts
2. Per NEC 600.21, neon secondary circuit conductors rated over 1,000 volts must be installed using which wiring method?
- Listed neon secondary circuit conductors (Type GTO cable) installed in accordance with the sign manufacturer instructions
- Standard THWN conductors in EMT
- NM cable (Romex) in accessible locations
- Any Chapter 3 wiring method
3. A large LED sign has a total connected load of 18 amperes at 120V. The sign is on continuously (more than 3 hours). What is the minimum branch circuit ampere rating required per NEC 600.5?
- 20 amperes — the sign load is treated as continuous (125% × 18 = 22.5A), but the maximum branch circuit for signs is 20A; a dedicated 20A circuit at 80% capacity can serve 16A continuous, so two circuits or a recalculation may be needed
- 15 amperes
- 30 amperes
- 25 amperes
Want more practice like this?
Start practicing free →4. Per NEC 600.9(A), sign and outline lighting enclosures installed outdoors must be what?
- Weatherproof and suitable for wet locations
- NEMA 1 rated (indoor use)
- Made of non-metallic material only
- Double-insulated
5. Per NEC 600.12, for LED signs using Class 2 power supplies, what wiring method is required for the secondary (output) wiring?
- Class 2 wiring methods per Article 725
- Only rigid metal conduit
- Same methods as the primary wiring
- Direct burial cable only
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