Mississippi Sign Erection Examination

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

• AElectric signs, outline lighting, skeleton tubing, and listed retrofit kits
• BHighway traffic signals and roadway guide signs only
• CInterior dwelling luminaires and track lighting only
• DUtility-owned distribution transformers on public rights-of-way

Each commercial building or occupancy accessible to pedestrians must be provided with at least one accessible sign outlet supplied by which branch circuit?

• AA 15-ampere multioutlet lighting circuit that also serves show-window receptacles
• BAn individual branch circuit rated at least 20 amperes that supplies no other load
• CA 30-ampere dryer circuit shared with the tenant space
• DA 40-ampere feeder tap taken from the HVAC equipment circuit

Branch circuits that supply neon tubing installations shall not be rated in excess of:

• A15 amperes
• B20 amperes
• C30 amperes
• D50 amperes

Except for neon tubing installations, branch circuits that supply signs and outline lighting systems shall not be rated more than:

• A15 amperes
• B20 amperes
• C30 amperes
• D60 amperes

For load calculations, branch circuits that supply electric signs are treated as:

• ANoncontinuous loads sized at 80 percent of nameplate
• BIntermittent motor loads sized at 250 percent of running current
• CContinuous loads
• DOptional standby loads that may be ignored in the service calculation

Each circuit that supplies a sign, outline lighting system, or skeleton tubing must be controlled by an externally operable switch or circuit breaker that:

• AOpens the grounded conductor only
• BOpens all ungrounded conductors
• COpens the equipment grounding conductor first
• DBypasses the controller so the sign stays energized for service

In the NEC, a disconnect that is “within sight from” a sign must be visible and not more than how far from the sign?

• A25 feet
• B50 feet
• C75 feet
• D100 feet

Bonding conductors used on signs and outline lighting systems must be copper and not smaller than:

• A18 AWG
• B16 AWG
• C14 AWG
• D8 AWG

Why must the earth not be used as the effective ground-fault current path for a metal sign structure?

• ASoil resistance is too high to reliably open the overcurrent device
• BConcrete footings already provide a zero-ohm return path
• CThe NEC requires the grounded conductor to be landed on the pole only
• DSign circuits are ungrounded delta systems that cannot fault to earth

Unless mechanically protected from physical damage, a sign or outline lighting system must be at least how high above areas accessible to vehicles?

• A8 feet
• B10 feet
• C14 feet
• D18 feet

Signs and outline lighting systems installed in wet locations must be weatherproof and must have:

• AA sealed, airtight cabinet with no openings
• BDrain holes
• COnly indoor-rated ballasts
• DA wood backer board as the weather barrier

The flexible cord on a portable or mobile sign used in a dry location shall not exceed:

• A6 feet
• B10 feet
• C15 feet
• D25 feet

A portable or mobile sign used in a wet or damp location must have junior hard-service or hard-service cord with an equipment grounding conductor and:

• AA field-installed fuse in the attachment plug
• BFactory-installed GFCI protection
• CA two-prong ungrounded plug so the GFCI will not nuisance-trip
• DType SPT-1 lamp cord

Except for field-installed skeleton tubing and Chapter 3-wired outline lighting, electric signs, section signs, and outline lighting must be:

• AField-fabricated from unlisted sheet metal and household lamps
• BListed and installed in accordance with the listing instructions
• CApproved only by the crane operator on the day of erection
• DExempt from listing if the circuit is 20 amperes or less

Manufacturer markings on a sign (name, voltage, and current rating) must be:

• AVisible after finish work even if they cannot be seen during servicing
• BVisible during servicing, and weatherproof if the sign is in a wet location
• CWritten in pencil on the inside of the plexiglass face only
• DOmitted on listed LED retrofits

Signs and outline lighting systems must be installed so adjacent combustible materials are not subjected to temperatures exceeding:

• A90°F (32°C)
• B140°F (60°C)
• C194°F (90°C)
• D302°F (150°C)

An incandescent or HID lamp or lampholder in a sign must be spaced at least how far from wood or other combustible material?

• A1/2 inch
• B1 inch
• C2 inches
• D12 inches

Listed Class 2 cable used in electric signs and outline lighting shall not be smaller than:

• A18 AWG
• B22 AWG
• C26 AWG
• D30 AWG

A listed LED sign has a nameplate input of 16 amperes at 120 volts. What is the minimum standard overcurrent-device rating for this continuous sign load?

• A15 amperes
• B16 amperes
• C20 amperes
• D30 amperes

The individual 20-ampere branch circuit that supplies the required commercial-occupancy sign outlet may also supply:

• AShow-window receptacles in the same tenant space
• BNo other load
• CThe parking-lot pole lights on the same facade
• DA 1/2-horsepower rooftop exhaust fan

Where a multiwire branch circuit supplies a sign, the disconnecting means must:

• AOpen only the grounded conductor
• BOpen all ungrounded conductors simultaneously
• COpen one ungrounded conductor at a time so half the sign can stay lit
• DBe a single-pole switch in the neon-transformer secondary

If a sign disconnect is located remote from the sign, sign body, or pole, NEC 600.6 requires the disconnect to be in an accessible location for first responders and service personnel and:

• AA label at the sign that identifies the disconnect location and complies with 110.21(B)
• BNo field marking, because the panel schedule is sufficient
• CA red painted stripe on the pole only
• DA note on the original shop drawing left in the truck

Where the sign disconnect is required to be lockable in the open position, the locking provision must:

• ABe a portable hasp that the technician carries in a tool bag
• BRemain in place on the switch or circuit breaker whether or not the lock is installed
• CBe a twist-tie on the enclosure handle
• DLock the enclosure door only, leaving the breaker operable

When a sign is operated by an external electronic or electromechanical controller, the disconnect must be capable of disconnecting the sign and the controller from all ungrounded supply conductors and must be:

• AHidden above a locked suspended ceiling so tenants cannot operate it
• BWithin sight of, or in the same enclosure with, the controller, and lockable in the open…
• CInstalled only on the neon secondary
• DOmitted if the controller has a software off switch

Circuit conductors that supply a pole-mounted sign may be run inside the support pole when the installation complies with the NEC pole-as-raceway rules, which generally require:

• AA handhole or equivalent access, a grounding means, and a wiring method identified for th…
• BLoose Type NM cable dropped down an unlisted painted pole
• CNo access opening, so the pole remains watertight
• DThe grounded conductor used as the only equipment grounding path

The wire-type equipment grounding conductor for a 20-ampere sign branch circuit must be copper not smaller than:

• A14 AWG
• B12 AWG
• C10 AWG
• D8 AWG

Listed flexible metal conduit or liquidtight flexible metal conduit that encloses neon secondary conductors may serve as the bonding means if the total cumulative length of that conduit does not exceed:

• A20 feet
• B50 feet
• C100 feet
• D250 feet

Unless the equipment is installed in the sign, each ballast, transformer, or electronic power supply must have a working space of at least:

• A18 inches high by 18 inches wide by 18 inches deep
• B3 feet high by 3 feet wide by 3 feet deep
• C6-1/2 feet high by 30 inches wide by 4 feet deep
• DNo working space, because signs are utilization equipment

Ballasts, transformers, or electronic power supplies installed in an attic or soffit require an access door and a passageway at least:

• A2 feet high by 12 inches wide with no walkway
• B3 feet high by 22-1/2 inches wide with a permanent walkway at least 12 inches wide
• C4 feet high by 36 inches wide with a removable plywood scrap as a walkway
• DAny crawl opening that a tool bag can pass through

Unless an NEC exception applies, neon transformers and electronic power supplies must be provided with:

• APrimary-only fuses and no secondary protection
• BSecondary-circuit ground-fault protection
• CA grounded secondary midpoint bonded to the building steel only
• DA 60-ampere primary breaker regardless of load

The secondary-circuit voltage of a neon transformer or electronic power supply shall not exceed:

• A1,000 volts
• B5,000 volts
• C7,500 volts
• D15,000 volts

The voltage to ground of any output terminal on a neon transformer secondary shall not exceed:

• A600 volts
• B2,500 volts
• C7,500 volts
• D15,000 volts

Class 2 power supplies used in electric signs and outline lighting must be:

• AAny doorbell transformer rated 24 volts
• BListed for use with electric signs and outline lighting, or a component in a listed sign
• CUnlisted LED drivers if the output is below 30 volts
• DAutomotive battery chargers with a 12-volt output

High-voltage neon secondary conductors are commonly run in listed GTO cable or a Chapter 3 raceway. GTO in this use means:

• AGrounded branch-circuit conductors only
• BGas-tube sign and ignition cable listed for neon secondary voltage
• CGeneral-use thermoplastic outdoor building wire
• DGreen equipment grounding conductor, type THHN

Neon secondary conductors between the transformer and the first electrode should be:

• AAs long as possible so voltage drop “softens” the tube
• BAs short as practicable
• CSpliced with wirenuts in the weather
• DPulled in the same raceway as the 120-volt primary whenever convenient

Unless the small-conductor exception in 240.4(D) is modified by a specific article, the maximum overcurrent protection for 12 AWG copper sign-circuit conductors is:

• A15 amperes
• B20 amperes
• C25 amperes
• D30 amperes

A 20-ampere sign branch circuit may supply a continuous sign load of not more than:

• A12 amperes
• B16 amperes
• C20 amperes
• D25 amperes

Field wiring that supplies a sign must terminate in:

• AA taped mid-span splice hanging on the messenger
• BThe sign or outline-lighting enclosure, a box, or a conduit body
• CAn open wirenut tucked behind the face
• DThe concrete footing, using the rebar as the neutral

A section sign shipped as listed sections that are assembled in the field must still be:

• ARewired with unlisted household fixtures after assembly
• BInstalled as a listed system in accordance with the listing and manufacturer instructions
• CTreated as skeleton tubing so listing no longer applies
• DEnergized from a shared lighting circuit to prove the sections

Neon tubing that is field-installed and not attached to a sign body or enclosure is treated under Article 600 as:

• AA luminaire subject only to Article 410
• BSkeleton tubing
• CA portable sign
• DAn optional standby generator circuit

Class 2 sign cables run through or parallel to wood framing must be at least 1-1/4 inches from the nearest edge of the framing member, or they must be protected by:

• AElectrical tape wrapped around the cable
• BA steel plate at least 1/16 inch thick or equivalent
• CA second layer of drywall only
• DPainted wood lath

Splices in Class 2 sign circuits must be made with listed insulating splicing devices in a listed box that remains:

• AFilled with spray foam and concealed forever
• BAccessible after installation
• CBuried in the sign footing
• DInside the neon GTO raceway

An auxiliary grounding electrode at a freestanding sign pole is:

• ARequired for every electric sign
• BPermitted, and if installed it must comply with 250.54, but it does not replace the circu…
• CA legal substitute for the equipment grounding conductor
• DProhibited by Article 600 in all cases