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MASTER NEC 2023

Master Electrician Practice Test 18 – Special Equipment: Signs, Elevators, Cranes & IT Equipment

This is Master Electrician Practice Test 18 — Special Equipment, covering the smaller but frequently tested equipment articles: electric signs (Article 600), cranes and hoists (Article 610), elevators (Article 620), audio equipment (Article 640), and information technology equipment rooms (Article 645). The test has 25 multiple-choice questions on sign circuits and disconnects, crane runway conductors, elevator disconnects and hoistway wiring, and the special allowances available in IT equipment rooms. Pass score is 70%. Every question includes a full NEC 2023 explanation so you can trace each answer back to the exact code section.

TOPICS COVERED

Special Equipment

How this test works

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Frequently Asked Questions

Yes — completely free with no signup required. All answers include detailed explanations.

Requirements vary by state but typically include 4–8 years of documented electrical work experience plus a valid Journeyman license.

Advanced NEC code interpretation, load calculations, service entrance design, motor controls, generator systems, and electrical system design.

The Master exam focuses more on design, calculations, and planning rather than installation details. Load calculation and service sizing questions are weighted heavily.

Before You Start

25 questions — multiple choice
45 minutes to finish (timer starts when you begin)
Pass score is 70% — you need at least 18 correct answers
Full NEC 2023 explanation shown for every question after you submit

Topics in This Test

Dedicated 20A sign outlet at each pedestrian-accessible entrance (NEC 600.5(A))
Sign disconnecting means — within sight or lockable (NEC 600.6(A))
Sign grounding and bonding of metal parts (NEC 600.7)
Neon secondary (GTO) conductor special wiring rules (NEC 600.32)
Crane/hoist disconnecting means — accessible, lockable (NEC 610.31)
Bare crane runway contact conductors — guarding requirement (NEC 610.13)
Crane motor overcurrent protection principles (NEC 610.42)
Elevator disconnecting means — single means for all ungrounded conductors (NEC 620.51(A))
Elevator disconnect lockable in the open position (NEC 620.51(C))
Elevator car lighting/receptacle/ventilation circuit kept separate from power (NEC 620.22)
Machine room lighting circuit and switch at point of entry (NEC 620.23/620.24)
Elevator hoistway wiring methods (NEC 620.37)
Elevator traveling cable — special listed cable type
GFCI protection in elevator pit, car top, and machine room (NEC 620.85)
Special IT equipment room provisions apply only when all listed conditions are met (NEC 645.4)
IT equipment room disconnecting means (NEC 645.10)
Under-raised-floor cabling allowance unique to IT rooms (NEC 645.5(D))
Flexible cords for certain permanently installed audio equipment (NEC 640.9)
Scope of Article 600 — signs and outline lighting
Scope of Article 610 — cranes, monorail hoists, and runway conductors
Scope of Article 620 — elevators, dumbwaiters, escalators, moving walks, and lifts
Scope of Article 645 — information technology equipment rooms
Extraneous wiring restrictions in an elevator hoistway (NEC 620.21)

Tip: These are "niche" articles individually, but together they make up a meaningful chunk of the master exam. Learn each article's scope first — once you know which article a piece of equipment falls under, most of the specific rules follow logically from the equipment's obvious safety concerns (moving parts, exposed conductors, continuous operation).

Questions

45 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

Master Electrician Practice Test 18 – Special Equipment: Signs, Elevators, Cranes & IT Equipment — Question List

Question 1: NEC 600.5(A) requires each commercial building and occupancy accessible to pedestrians to have at least one sign outlet supplied by:

A dedicated 20A branch circuit
Any shared general-purpose lighting circuit
A Class 2 power-limited circuit only
No circuit is required if the sign is battery-powered

NEC Reference: NEC 600.5(A)

Question 2: NEC 600.6(A) requires the disconnecting means for an electric sign to be:

Within sight of the sign, or lockable in the open position if not
Located only inside the building, regardless of sign location
Optional for signs under 20A
Never required for outline lighting

NEC Reference: NEC 600.6(A)

Question 3: NEC 600.7 requires the metal parts of an electric sign to be:

Grounded and bonded
Left ungrounded to avoid stray current
Insulated from all metal, not grounded
Bonded only if the sign is illuminated

NEC Reference: NEC 600.7

Question 4: Neon and other electric-discharge lighting secondary (GTO) conductors are subject to:

Special high-voltage secondary wiring rules distinct from standard branch-circuit wiring
No special rules — treated identically to ordinary NM cable
A total prohibition under the NEC
Rules identical to service-entrance conductors

NEC Reference: NEC 600.32

Question 5: NEC 610.31 requires the disconnecting means for a crane or monorail hoist to be:

Readily accessible and operable from the ground or floor level, lockable
Located only in the crane cab, inaccessible from the floor
Optional for cranes under 5 tons
Not required if the crane is manually operated

NEC Reference: NEC 610.31

Question 6: Bare runway contact conductors that supply a traveling crane, per NEC 610.13, must be:

Guarded or positioned to prevent accidental contact
Left fully exposed at floor level with no guarding
Insulated with standard THHN, eliminating any guarding need
Prohibited entirely under the current NEC

NEC Reference: NEC 610.13

Question 7: Overcurrent protection for crane and hoist motors under NEC 610.42 is generally based on principles similar to:

Article 430 motor overcurrent protection principles
Article 680 pool bonding principles
Article 800 communications principles
No overcurrent protection is required for crane motors

NEC Reference: NEC 610.42

Question 8: NEC 620.51(A) requires an elevator to have:

A single disconnecting means for all ungrounded conductors
A separate disconnect for every individual motor in the system
No disconnecting means at all
A disconnect located only inside the elevator car

NEC Reference: NEC 620.51(A)

Question 9: NEC 620.51(C) requires the elevator disconnecting means to be:

Capable of being locked in the open position
Automatically reset after 30 seconds
Rated at exactly 15A regardless of load
Prohibited from being locked, for fire code reasons

NEC Reference: NEC 620.51(C)

Question 10: NEC 620.22 requires an elevator car's lighting, receptacle, and ventilation/air-conditioning circuit to be:

Kept separate from the elevator's power circuits
Combined with the main drive motor circuit to save wiring
Eliminated entirely — elevator cars require no lighting circuit
Supplied only by battery power, never by branch circuit

NEC Reference: NEC 620.22

Question 11: NEC 620.23/620.24 require the elevator machine room lighting circuit to have:

A switch located at the point of entry to the space
No switch — the lighting is always on
A switch located only inside the elevator car
A motion sensor is mandatory, with no manual switch permitted

NEC Reference: NEC 620.23/620.24

Question 12: NEC 620.37 requires wiring installed in an elevator hoistway to use which type of wiring methods?

Recognized raceways or cables such as RMC, IMC, EMT, or listed MC/MI cable
Open, unsupported conductors with no raceway
Only bare copper busbar
Only Class 2 low-voltage cable

NEC Reference: NEC 620.37

Question 13: The flexible cable that connects a moving elevator car to a fixed termination point in the hoistway is known as:

A traveling cable
A service lateral
A tap conductor
A drip loop

NEC Reference: NEC Article 620

Question 14: NEC 620.85 requires GFCI protection for 125V, single-phase, 15A and 20A receptacles located in which elevator-related spaces?

The elevator pit, car top, and machine room
Only the lobby waiting area
Only the building's main electrical room
GFCI is never required anywhere in an elevator installation

NEC Reference: NEC 620.85

Question 15: NEC 645.4 permits the special wiring allowances of Article 645 (Information Technology Equipment) to be used only when:

All of the article's listed conditions are met together
The room is larger than 500 sq ft
The building has more than five stories
Any one condition alone is sufficient

NEC Reference: NEC 645.4

Question 16: NEC 645.10 requires an information technology equipment room to have:

A disconnecting means for power to all IT equipment in the room
No disconnecting means, ever, to avoid accidental data loss
A disconnect rated for exactly 15A regardless of room size
A requirement that the room never have a fire alarm connection

NEC Reference: NEC 645.10

Question 17: What special wiring allowance does NEC 645.5(D) give to information technology equipment rooms that meet all of Article 645's conditions?

Listed power cables may be run under a raised floor without conduit
Listed power cables may be run under a raised floor without conduit, when all Article 645 conditions are met
All power wiring must always be in rigid conduit, with no exception
Under-floor cabling is completely prohibited under the NEC

NEC Reference: NEC 645.5(D)

Question 18: NEC 640.9 permits flexible cords to be used for certain permanently installed audio equipment. How does this compare to the general rule in Article 400?

It is an exception to the general 400.12 prohibition, under specific conditions
It duplicates 400.12 exactly with no exception
It bans flexible cords for audio equipment entirely
It applies only to portable, non-permanent audio equipment

NEC Reference: NEC 640.9

Question 19: NEC Article 600 primarily covers:

Electric signs and outline lighting
Swimming pools
Hazardous locations
Emergency generators

NEC Reference: NEC Article 600

Question 20: NEC Article 610 primarily covers:

Cranes, monorail hoists, and runway conductors
Health care facilities
Photovoltaic systems
Manufactured wiring systems

NEC Reference: NEC Article 610

Question 21: NEC Article 620 primarily covers:

Elevators, dumbwaiters, escalators, moving walks, and lifts
Marinas and boatyards
Agricultural buildings
Mobile homes

NEC Reference: NEC Article 620

Question 22: NEC Article 645 primarily covers:

Information technology equipment rooms
Carnival and fair wiring
Aircraft hangars
Recreational vehicle parks

NEC Reference: NEC Article 645

Question 23: How does the NEC's approach to bare crane runway contact conductors (Article 610) differ from its approach to overhead service conductors (Article 230)?

Crane conductors rely on guarding/positioning; service conductors rely primarily on clearance distances
Both use the exact same clearance-only approach with no guarding
Crane conductors require no protection of any kind
Service conductors are always guarded, never using clearance

NEC Reference: NEC 610.13 / 230.24

Question 24: NEC 620.21 generally restricts what may be installed within an elevator hoistway?

Wiring and equipment not associated with the elevator itself
Nothing — any building wiring may pass through freely
Only the traveling cable, which is also prohibited
Fire alarm wiring only, which is otherwise unrestricted

NEC Reference: NEC 620.21

Question 25: A rooftop channel-letter sign installation with a dedicated 20A circuit and a lockable disconnect at the roof access point is designed to comply with which NEC article?

Article 600 — Electric Signs and Outline Lighting
Article 610 — Cranes and Hoists
Article 620 — Elevators
Article 645 — Information Technology Equipment

NEC Reference: NEC Article 600

Key NEC References for This Test

Article	What It Covers
Art. 220	Load Calculations — optional and standard methods for multifamily
Art. 230	Services — service design, sizing, multiple disconnects
Art. 430	Motors — complete branch circuit design (conductor + OCPD + overload + disconnect)
Art. 445	Generators — standby systems, transfer switches
Art. 450	Transformers — sizing, primary/secondary OCPD, installation
Art. 706	Energy Storage Systems — battery/solar storage (major NEC 2026 expansion)

Study Tip: Practice transformer kVA calculations daily. Know the formula: I = kVA × 1000 ÷ (V × 1.732) for three-phase. This comes up on almost every master exam.

Master Electrician Practice Test 18 – Special Equipment: Signs, Elevators, Cranes & IT Equipment

How this test works

Frequently Asked Questions

Before You Start

Topics in This Test

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Key NEC References for This Test

Master Electrician Practice Test 18 – Special Equipment: Signs, Elevators, Cranes & IT Equipment

How this test works

Frequently Asked Questions

Is this Master Electrician Practice Test 18 – Special Equipment: Signs, Elevators, Cranes & IT Equipment free?

How do I qualify for the Master Electrician exam?

What is covered on the Master Electrician exam?

How is the Master exam different from the Journeyman exam?

Before You Start

Topics in This Test

Electrician Reviews

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Master Electrician Practice Test 18 – Special Equipment: Signs, Elevators, Cranes & IT Equipment — Question List

Question 1: NEC 600.5(A) requires each commercial building and occupancy accessible to pedestrians to have at least one sign outlet supplied by:

Question 2: NEC 600.6(A) requires the disconnecting means for an electric sign to be:

Question 3: NEC 600.7 requires the metal parts of an electric sign to be:

Question 4: Neon and other electric-discharge lighting secondary (GTO) conductors are subject to:

Question 5: NEC 610.31 requires the disconnecting means for a crane or monorail hoist to be:

Question 6: Bare runway contact conductors that supply a traveling crane, per NEC 610.13, must be:

Question 7: Overcurrent protection for crane and hoist motors under NEC 610.42 is generally based on principles similar to:

Question 8: NEC 620.51(A) requires an elevator to have:

Question 9: NEC 620.51(C) requires the elevator disconnecting means to be:

Question 10: NEC 620.22 requires an elevator car's lighting, receptacle, and ventilation/air-conditioning circuit to be:

Question 11: NEC 620.23/620.24 require the elevator machine room lighting circuit to have:

Question 12: NEC 620.37 requires wiring installed in an elevator hoistway to use which type of wiring methods?

Question 13: The flexible cable that connects a moving elevator car to a fixed termination point in the hoistway is known as:

Question 14: NEC 620.85 requires GFCI protection for 125V, single-phase, 15A and 20A receptacles located in which elevator-related spaces?

Question 15: NEC 645.4 permits the special wiring allowances of Article 645 (Information Technology Equipment) to be used only when:

Question 16: NEC 645.10 requires an information technology equipment room to have:

Question 17: What special wiring allowance does NEC 645.5(D) give to information technology equipment rooms that meet all of Article 645's conditions?

Question 18: NEC 640.9 permits flexible cords to be used for certain permanently installed audio equipment. How does this compare to the general rule in Article 400?

Question 19: NEC Article 600 primarily covers:

Question 20: NEC Article 610 primarily covers:

Question 21: NEC Article 620 primarily covers:

Question 22: NEC Article 645 primarily covers:

Question 23: How does the NEC's approach to bare crane runway contact conductors (Article 610) differ from its approach to overhead service conductors (Article 230)?

Question 24: NEC 620.21 generally restricts what may be installed within an elevator hoistway?

Question 25: A rooftop channel-letter sign installation with a dedicated 20A circuit and a lockable disconnect at the roof access point is designed to comply with which NEC article?

Key NEC References for This Test

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