Nevada C-6B Sign Contractor Examination

What work does NAC 624.240 authorize under Nevada subclassification C-6B Electrical Signs?

• AFabrication, installation and erection of electrical signs and the installation of any re…
• BBillboard erection only, with no electrical lighting permitted
• CPainting of art and advertising messages on signs, with no erection work
• DSheet-metal work only, with electrical connections left to a C-2 contractor

NEC 2017 Article 600 covers the installation of conductors, equipment, and field wiring for which systems?

• AElectric signs and outline lighting, including retrofit kits
• BOnly factory-wired portable lamps under Article 410
• COnly service-entrance conductors under Article 230
• DOnly swimming-pool underwater luminaires under Article 680

Per NEC 2017 600.5(A), each commercial occupancy accessible to pedestrians must have at least one sign or outline-lighting outlet at each entrance to each tenant space. What is the minimum rating of the branch circuit that supplies that outlet?

• A20 amperes, and the circuit shall supply no other load
• B15 amperes, shared with the storefront receptacles
• C30 amperes, shared with the HVAC rooftop unit
• D40 amperes, reserved for a future pylon sign

How does NEC 2017 600.5 treat branch circuits that supply electric signs for load calculations?

• AThey are considered continuous loads
• BThey are considered noncontinuous loads
• CThey are calculated at 80 percent of nameplate without the 125 percent factor
• DThey are exempt from Article 220 load calculations

Under NEC 2017 600.5(B), what are the maximum branch-circuit ratings for neon-tubing installations versus other signs and outline lighting?

• ANeon tubing 30 amperes or less; other signs and outline lighting 20 amperes or less
• BNeon tubing 20 amperes or less; other signs 30 amperes or less
• CBoth types 40 amperes or less
• DBoth types 15 amperes or less

NEC 2017 600.6 requires each circuit for a sign, outline lighting system, or skeleton tubing to be controlled by an externally operable switch or circuit breaker that does which of the following?

• AOpens all ungrounded conductors, and opens them simultaneously on a multiwire branch circ…
• BOpens only the grounded conductor so the sign stays referenced to earth
• COpens one ungrounded conductor and leaves the other hot for night lighting
• DOpens the equipment grounding conductor to isolate the cabinet

When NEC 2017 600.6 locates a sign disconnect “within sight” of the sign, what does Article 100 require for that phrase?

• AThe disconnect must be visible and not more than 50 feet from the sign
• BThe disconnect may be in any locked electrical room in the same building
• CThe disconnect may be any distance away if it is labeled
• DThe disconnect must be mounted on the transformer secondary bushing

Unless mechanically protected from physical damage, NEC 2017 600.9(A) requires a sign or outline lighting system to be at least how far above areas accessible to vehicles?

• A14 feet
• B8 feet
• C10 feet
• D18 feet

NEC 2017 600.3 requires electric signs, section signs, and outline lighting to be listed. Which field-installed work is exempt from that listing requirement if it is wired to Chapter 3 methods?

• AField-installed skeleton tubing, and field-installed outline lighting wired to Chapter 3
• BEvery factory section sign shipped in more than one crate
• CEvery LED retrofit kit installed in a listed host sign
• DEvery portable indoor banner with a 120-volt attachment plug

NEC 2017 600.4 requires signs and outline lighting systems to be permanently and durably marked with the manufacturer’s identification. Where must that marking remain visible?

• AIt need not be visible after installation, but it must be visible during servicing; wet-l…
• BIt must remain readable from the public sidewalk after installation
• CIt may be painted over if the permit number is on the disconnect
• DIt is required only on portable signs

A 2017 NEC sign disconnect is within sight of most of a section sign, but one energizable section is around a corner and not visible from the disconnect. What additional control does 600.6 require?

• AThe disconnect must be lockable in the open position, with the locking provision remainin…
• BA second service disconnect at the utility transformer is required
• CThe hidden section may remain energized if it is Class 1
• DOnly the controller software interlock is required

NEC 2017 600.7(A) requires metal equipment of signs, outline lighting, and skeleton tubing to be connected to an equipment grounding conductor. How is a wire-type EGC sized?

• APer Table 250.122, based on the rating of the overcurrent device protecting the sign supp…
• BAlways 8 AWG copper, regardless of breaker size
• CPer Table 250.66, based on the service ungrounded conductors
• DNo EGC is required if a ground rod is driven at the pole

NEC 2017 600.7(B) bonding conductors for signs and outline lighting must be which of the following?

• ACopper and not smaller than 14 AWG, with outdoor runs protected from physical damage
• BAluminum and not smaller than 12 AWG
• CAny listed fixture wire, including 18 AWG
• DBare steel messenger wire

Listed flexible metal conduit or listed liquidtight flexible metal conduit used for neon secondary-circuit conductors may serve as the bonding means only if the total cumulative length of that conduit does not exceed what value under NEC 2017 600.7(B)(4)?

• A100 feet
• B20 feet
• C50 feet
• D6 feet

NEC 2017 600.7(B)(1) Exception does not require remote metal parts of a section sign or outline lighting system to be connected to an equipment grounding conductor when those parts are supplied by which source?

• AA remote Class 2 power supply
• BA 15-kilovolt neon transformer
• CA 277-volt fluorescent ballast
• DA 480-volt three-phase feeder

Why does NEC 2017 600.7, read with 250.4, prohibit using the earth as the effective ground-fault current path for a sign?

• AEarth contact resistance is high, so fault current may not open the overcurrent device an…
• BEarth is a better conductor than copper and would trip the breaker too quickly
• CA ground rod automatically bonds the grounded conductor at the sign
• DArticle 250 requires every sign pole to be a grounding electrode

NEC 2017 600.9(C) limits the temperature to which a sign or outline lighting system may subject adjacent combustible materials, and it requires spacing from incandescent or HID lamps. What are those values?

• A194°F maximum on adjacent combustibles, and at least 2 inches from an incandescent or HID…
• B140°F maximum and 1/2 inch of spacing
• C90°C maximum and no spacing if the lamp is listed
• D212°F maximum and 6 inches of spacing

NEC 2017 600.9(D) requires signs and outline lighting systems installed in wet locations to be which of the following?

• AWeatherproof and provided with drain holes
• BOpen-back so rain can pass through freely
• CFilled with potting compound and have no openings
• DInstalled only under a canopy

For a portable or mobile electric sign used in a wet or damp location, NEC 2017 600.10 requires which combination?

• AJunior hard-service or hard-service cord with an equipment grounding conductor, plus list…
• BAny zip-cord lamp wire and a field-installed GFCI adapter
• CA 25-foot extension cord of any type
• DA two-wire ungrounded cord if the sign is double insulated

What is the maximum flexible-cord length NEC 2017 600.10(D) allows on a portable or mobile sign installed in a dry location?

• A15 feet
• B6 feet
• C25 feet
• D50 feet

NEC 2017 600.21 permits ballasts, transformers, and electronic power supplies above a suspended ceiling only when which condition is met?

• AThe enclosures are securely fastened in place, not supported by the ceiling grid, and are…
• BThey rest on the ceiling tiles so they can be removed for service
• CThey are supplied by a flexible cord plugged into a ceiling receptacle
• DThey are laid in the grid like a lay-in luminaire

A listed LED wall sign draws 16 amperes continuously at 120 volts. Using NEC 2017 600.5, 210.19(A)(1), 210.20(A), and 240.4(D), what is the minimum copper conductor size and maximum standard overcurrent-device rating for that branch circuit?

• A12 AWG copper and a 20-ampere overcurrent device
• B14 AWG copper and a 15-ampere overcurrent device
• C10 AWG copper and a 40-ampere overcurrent device
• D8 AWG copper and a 50-ampere overcurrent device

NEC 2017 220.14(F) requires the calculated load of each required 600.5(A) electric-sign branch circuit to be at least which value?

• A1,200 volt-amperes
• B180 volt-amperes
• C600 volt-amperes
• D3,600 volt-amperes

A 120-volt sign circuit carries 16 amperes. The one-way run is 90 feet of 12 AWG copper (K = 12.9, area = 6,530 CM). What is the single-phase voltage drop?

• A5.69 volts
• B2.84 volts
• C4.93 volts
• D9.35 volts

Three neon-tubing transformers on one 120-volt primary circuit draw 7.2 amperes each and operate continuously. Using NEC 2017 600.5(B), 210.19(A)(1), 210.20(A), Table 310.15(B)(16), and 240.4(D), what is the smallest copper THWN conductor and standard breaker that will carry the load?

• A10 AWG copper and a 30-ampere breaker
• B12 AWG copper and a 20-ampere breaker
• C14 AWG copper and a 15-ampere breaker
• D8 AWG copper and a 50-ampere breaker

A 30-ampere neon-tubing branch circuit is protected by a 30-ampere breaker. Per NEC 2017 600.7(A)(2) and Table 250.122, what is the minimum copper equipment grounding conductor?

• A10 AWG copper
• B14 AWG copper
• C12 AWG copper
• D8 AWG copper

Under the Uniform Sign Code 1997, when must a permit be obtained for a permanent electric sign?

• ABefore the sign is erected, reconstructed, or replaced, unless the sign is a listed exemp…
• BOnly after the sign has been energized for 30 days
• CNever, because C-6B licensure replaces the building permit
• DOnly if the sign face exceeds 200 square feet

Uniform Sign Code 1997 Section 401.2 requires signs and sign structures to be designed and constructed to resist which environmental force?

• AWind forces
• BOnly snow load, ignoring wind
• COnly hydrostatic pressure from irrigation spray
• DOnly seismic load, ignoring wind

In Uniform Sign Code terminology, what is a ground sign?

• AA billboard or similar sign supported by one or more uprights, poles, or braces in or upo…
• BAny sign painted on a building wall
• CAny sign mounted entirely above the roof deck
• DAny banner hung from a marquee

In Uniform Sign Code terminology, what is a roof sign?

• AA sign erected upon or above a roof or parapet of a building or structure
• BA sign fastened flat to an exterior wall and not extending above the roof
• CA sidewalk sandwich board
• DA temporary real-estate stake sign

In Uniform Sign Code terminology, what is a wall sign?

• AA sign attached to or erected against the wall of a building or structure, with the face…
• BA sign wholly supported by a pole in the parking lot
• CA sign spanning between two buildings over a street
• DA sign painted on a vehicle parked at the curb

In Uniform Sign Code terminology, what is a projecting sign?

• AA sign other than a wall sign that projects from and is supported by a wall or building f…
• BA sign lying flat on a roof deck
• CA sign stenciled on an interior glass door
• DA temporary banner taped to a window

How does the Uniform Sign Code distinguish a pole sign from a ground sign?

• AA pole sign is wholly supported by a sign structure in the ground; a ground sign is a bil…
• BThere is no difference; the terms are interchangeable
• CA pole sign must be painted wood; a ground sign must be neon
• DA pole sign is any sign taller than 6 feet, regardless of support

Under the Uniform Sign Code, what is a combination sign?

• AA sign that incorporates any combination of the features of pole, projecting, and roof si…
• BAny sign that uses both neon and LEDs
• CTwo wall signs on opposite building faces
• DA portable sign with a changeable letter track

The Uniform Sign Code illumination rule allows a sign to be illuminated by which means?

• AElectrical means only; open spark or flame is prohibited unless specifically approved
• BOpen-flame gas torches at the letters
• CKerosene lanterns hung on the fascia
• DAny heat source if a fire extinguisher is within 10 feet

Under Uniform Sign Code structural rules, what is the maximum height above the ground for the structural frame of a ground sign erected of combustible materials?

• A35 feet
• B14 feet
• C50 feet
• D100 feet

Under Uniform Sign Code structural rules, a ground sign constructed entirely of noncombustible material shall not be erected higher than which height above the ground, unless a greater height is specifically approved?

• A100 feet
• B35 feet
• C20 feet
• D6 feet

Uniform Sign Code ground-sign rules require the bottom coping of every ground sign to be not less than how far above the ground or street level?

• A3 feet, and that space may be filled with platform decorative trim or light wooden constr…
• B14 feet, with no fill permitted
• C6 inches, so the panel sits on grade
• D10 feet, matching marquee clearance

Uniform Sign Code roof-sign construction requires a clear space of not less than which distance between the roof level and the lowest part of the sign?

• A6 feet
• B3 feet
• C2 feet
• D10 feet

In addition to the roof-level clear space, Uniform Sign Code roof-sign rules require not less than how much clearance between the vertical supports of the sign?

• A5 feet
• B12 inches
• C3 feet
• D10 feet

May a Uniform Sign Code roof-sign structure project beyond an exterior wall of the building?

• ANo. Roof sign structures shall not project beyond an exterior wall
• BYes, up to 4 feet if guyed
• CYes, if the projection is only the neon tubing
• DYes, if the wall is noncombustible

Uniform Sign Code roof-sign construction requires the sign to be built of which materials, aside from limited combustible letters or ornament permitted by the code?

• AEntirely of metal or other approved noncombustible material, with metallic parts electric…
• BUntreated wood posts and plywood faces
• CFoam board on a wood frame
• DCanvas on a timber A-frame

Under Uniform Sign Code wall-sign rules, a wall sign that exceeds which area must be constructed of metal or other approved noncombustible material (except as the code allows for nailing rails or limited combustibles)?

• A40 square feet
• B6 square feet
• C100 square feet
• D200 square feet

Uniform Sign Code projecting-sign rules require projecting signs to be constructed of which materials and supports?

• AEntirely of metal or other noncombustible material, securely attached to the building by…
• BWood brackets and a plywood blade
• CNylon rope slings from the parapet
• DAdhesive only, with no mechanical fasteners

When the Uniform Sign Code requires drawings and specifications with a sign permit, what must those documents show?

• ADimensions, materials, and required details of construction, including loads, stresses, a…
• BOnly a color rendering for the planning department
• COnly the neon footage chart
• DOnly the contractor’s license number