Cards

A ___ is a type of surface, flush, or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at the factory.

An organization, office, or individual responsible for enforcing the requirements of a code or standard, or for approving equipment, materials, an installation, or a procedure is known as the ___.

A clothes closet is described as a(n) ___ room or space intended primarily for storage of garments and apparel.

A unit of an electrical system, other than a conductor, that carries or controls electric energy as its principal function is known as a(n) ___.

A conducting object through which a direct connection to earth is established is a(n) ___.

When the code specifies that one equipment shall be “in sight from”, “within sight from”, or “within sight of”, the equipment must be visible and not more than ___ away.

A lighting outlet is an outlet intended for the direct connection of a lampholder or ___.

An enclosed channel designed expressly for holding wires, cables, or busbar is a(n) ___.

A branch circuit that supplies only one utilization equipment is a(n) ___ branch circuit.

Service conductors are the conductors from the service point to the ___.

Covered, shielded, fenced, enclosed, or otherwise protected by means of suitable covers, casings, barriers, rails, screens, mats, or platforms to remove the likelihood of approach or contact by persons or objects to a point of danger is the def nition of ___.

A premises wiring system whose power is derived from a source of electric energy or equipment other than a service def nes a ___. Some examples of this may include a generator, a battery, converter windings, a transformer, and a solar photovoltaic system, provided they have no direct electrical connection to

supply conductors originating in another system.

A ___ is used to connect the grounding electrode to the equipment or to the grounded conductor at the service equipment.

A(n) ___ branch circuit consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system.

Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage sufficient for the current that is available ___.

Unless identified for use in the operating environment, no conductors or equipment shall be located in ___ having a deteriorating effect on the conductors or equipment.

I. damp or wet locations

II. where exposed to gases, fumes, vapors, liquids, or other agents

Electric equipment shall be installed in a neat and ___ manner.

The minimum depth of working space for a 240/120-volt, 3-phase, 4-wire panelboard, with exposed live parts on one side and grounded parts on the other, shall be at least ___ feet.

The minimum depth of working space for a 240/120-volt, three-phase panelboard mounted on one wall (with exposed live parts) and another 240/120-volt, three-phase panelboard on the opposite wall (with exposed live parts), shall be at least ___ feet.

The required minimum working space for a 120/240-volt, single-phase service panel when grounded parts are opposite the panel is ___.

The width of the working space in front of the electric equipment shall be the width of the equipment or ___ inches, whichever is greater.

Given: You have a surface mounted wireway installed below a surface mounted panelboard. The wireway and the panelboard are connected together by means of conduit nipples. The wireway shall be permitted to extend not more than ___ in. beyond the front of the panelboard.

The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor control centers shall be ___.

Entrances to rooms and other guarded locations containing exposed live parts shall be marked with ___ warning signs forbidding unqualif ed persons to enter.

For equipment rated 1200 amperes or more and over 6 feet wide (600 volts or less), containing overcurrent devices, switching devices, or control devices, there shall be one entrance not less than ___ inches wide and 6 1/2 feet high at each end of the working space.

Given: You have a 7-ft. wide switchboard installed in an electrical equipment room. Disregarding exceptions, if the switchboard is rated ___ amperes or more, the equipment room is required to have two entrances.

The grounded conductor, when insulated, shall have insulation ___.

I. rated not less than 300 volts for solidly grounded neutral systems of 1 kv and over as described in section 250.184

II. which is suitable, other than color, for any ungrounded conductor of the same circuit on circuits of less than 1000 volts

When two multiwire branch circuits from different systems are installed in the same raceway and the neutral from one system has an outer covering of white, the other circuit’s neutral is permitted to have an outer covering of ___.

I. white with green stripe

II. natural gray

III. white with colored stripe, other than green

Insulated grounded conductors shall have insulation that is suitable, other than color, for any ungrounded conductor of the same circuit for systems of ___ volts or less.

Neutral conductors ___ be used for more than one branch circuit, for more than one multiwire branch circuit, or for more than one set of ungrounded feeder conductors unless specifically permitted.

Which of these methods is allowed for identifying grounded conductors 6 AWG and smaller?

If a cable assembly is used in a 3-way switch loop for a 120V lighting circuit, the white conductor can be reidentified as an ungrounded conductor, but must be the conductor that supplies the ___.

The grounded conductor terminal for receptacle can be identified by ___.

For devices with screw shells, the terminal for the grounded conductor shall be the one connected to the ___.

The identification of terminals to which a grounded conductor is to be connected shall be substantially ___ in color.

A duplex receptacle with two circuits on the same yoke is permitted to have ___ as a means of disconnect.

I. two single-pole circuit breakers without tie handles

II. one double-pole circuit breaker

III. two single-pole circuit breakers with tie handles

All branch circuits that supply 120volt, 15- and 20-ampere outlets installed in dwelling unit ___ shall be protected by an arc-fault circuit interrupter listed to provide protection of the entire branch circuit.

One single receptacle with a 20-ampere rating may be installed on a ___-ampere individual branch circuit.

I. 15 II. 20

A 50-ampere rated single receptacle may be installed on a ___-ampere individual branch circuit.

Receptacles connected to a 20-amp residential branch circuit are to be rated ___.

I. 15 amperes II. 20 amperes

In a dwelling, a living room branch circuit with a 20-ampere rating can be loaded to a maximum of ___ amperes.

Two 20-ampere small appliance circuits ___ supply more than one kitchen of a dwelling.

Outdoor receptacles at a dwelling unit are not required to be GFCI-protected if they are supplied from a dedicated branch circuit installed ___.

A cord connector that is supported by a permanently installed cord pendant shall be considered a(n) ___ outlet.

Where a baseboard heater is to be permanently installed in a dwelling, a factory-installed duplex receptacle in the heater is ___.

In a dwelling, the maximum distance between receptacles is ___ feet.

How many outside receptacles, accessible at grade level, are required for a single-family dwelling?

Switch-controlled receptacles (in lieu of a lighting outlet) are permitted in all except which of the following?

Ground-fault circuit-interrupter protection MUST be provided in residential kitchens for receptacles ___.

For the kitchen small-appliance branch circuit in a dwelling, the Code requires not less than which of the following?

Receptacles in a kitchen of a residence that are to serve countertop surfaces shall be installed so that no point along the wall line is more than ___ inches, measured horizontally, from a receptacle outlet in that space.

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The maximum distance between kitchen countertop receptacles in a one-family dwelling is ___ feet.

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A 24"-wide by 5'-long island countertop in a dwelling kitchen shall have receptacles installed ___.

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Residential bathroom receptacle outlets shall be supplied by ___.

I. ground-fault protection for personnel

II. at least one 20-amp branch circuit

Appliance receptacle outlets installed in a dwelling for specific appliances, such as laundry equipment, shall be placed within ___ feet of the intended location of the appliance.

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In a dwelling unit, a hallway measuring 21 1/2 feet in length requires a minimum of ___ receptacle outlets(s).

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Accessory buildings that have a floor located ___ grade level not intended as habitable rooms and limited to storage or work areas shall have ground-fault circuit-interrupter protection for all 125-volt, 15- and 20-ampere receptacles.

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The maximum distance between receptacle outlets in a multifamily dwelling is ___.

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A residence has a front entrance on the north side of the house, an attached garage with an 8'-wide door, and a back entrance door on the south side of the house. How many lighting outlets are required for these outdoor entrances?

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Interior stairway lighting outlets in dwellings shall be controlled by a wall switch at each floor level where the difference between levels is ___ steps or more.

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The Code ___ require a lighting outlet in a clothes closet.

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All 125-volt, single-phase, 15- and 20-ampere receptacles installed in bathrooms of ___ shall have ground-fault circuit-interrupter protection for personnel.

Branch-circuit conductors that supply a continuous load are required to have an ampacity of not less than ___ percent of the continuous load plus ___ percent of the noncontinuous load.

A single receptacle shall have a rating of ___ percent of the branch-circuit rating.

A cord connector that is supported by a permanently installed cord pendant shall be considered a(n) ___.

The space measured horizontally above a show window must have at least one receptacle for each ___ linear feet.

The minimum feeder-circuit conductor size, before the application of any adjustment or correction

factors, shall have an allowable ampacity equal to or greater than the noncontinuous load plus ___

percent of the continuous load.

The minimum size THHN copper neutral conductor permitted for an 8 3/4 kW, 240-volt, 3-wire household electric range is ___ AWG.

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One cooktop and two ovens are connected to one branch circuit in a kitchen of a one-family dwelling. The cooktop has a nameplate rating of 4 kW at 240 volts, and each oven has a nameplate rating of 5.5 kW at 240 volts. The minimum load calculation for this branch circuit is ___ watts.

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Raceways on the outside of a building shall be ___.

The installation of outside wiring on surfaces of buildings shall be permitted for circuits not over 1000 volts, nominal, as ___.

Vegetation such as trees shall not be used for support of ___.

Outdoor lampholders with terminals of a type that puncture the ___ shall be attached only to conductors of the stranded type.

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Communications conductors shall be mounted not less than ___ inches below power conductors rated

over 300 volts supported on poles.

Where more than one building or other structure is on the same property and under single management,

each building or other structure served shall be provided with means for disconnecting all ___ conductors

located nearest the point of entrance of the supply conductors.

I. grounded II. ungrounded

An overhead feeder is to be installed to a residential garage. The conductors are insulated and have a voltage of 120 volts to ground. This circuit does not pass over a sidewalk or driveway. What is the minimum height above the ground that must be maintained?

Conductors shall be considered outside a building where installed ___.

I. in a raceway

II. within a building in a raceway enclosed by 2″ of brick

III. under not less than 2″ of concrete beneath a building

Without exceptions, the minimum size service lateral conductors allowed by the NEC

® is ___.

Service entrance cables, where subject to physical damage, shall be protected when installed in ___.

I. EMT II. IMC III. RMC

Where exposed to the weather, raceways enclosing service-entrance conductors shall be ___.

I. Suitable for use in wet locations II. arranged to drain III. racked

Where it is impracticable to locate the service head above the point of attachment, the service head

location shall be permitted no further than ___ from the point of attachment.

A(An) ___ is considered to be service equipment by the NEC

®.

I. individual meter socket enclosure

II. service disconnecting means

III. panelboard

If the service disconnecting means is located inside a residence, it shall be located ___ the point of entrance of the service conductors.

A building is provided with two sets of service-drop conductors from the utility pole. One service drop

is 120/240-V for lighting and receptacle loads, and the other service is 480-V to supply motor loads.

How many disconnecting means are permitted for this building?

Two or three single-pole switches or breakers, capable of individual operation, shall be permitted on

multiwire circuits, one pole for each ungrounded conductor, as one multipole disconnect provided they

are equipped with ___ to disconnect all conductors of the service with no more than six operations of

the hand.

I. a master handle II. identif ed handle ties

In a multiple-occupancy building, each occupant shall have access to its own service ___.

For a one-family dwelling, the service disconnecting means shall have a rating of not less than ___

amperes, 3-wire.

Where necessary to prevent ___, an automatic overcurrent device protecting service conductors supplying

only a specif c load, such as a water heater, shall be permitted to be locked or sealed where located

so as to be accessible.

Disregarding exceptions, all 3-phase, 277/480-volt, wye electrical services require ground-fault protection

for each service disconnecting means when rated for ___ amps or more.

Each ___ service conductor shall have overload protection.

Service conductors installed as unjacketed multiconductor cable shall have a minimum clearance of ___ feet from doors, porches, f re escapes, windows designed to be opened, and similar equipment.

The minimum clearance above the roof for 120/240-volt service conductors terminating at a through-the-roof raceway when less than 6 feet of the conductors pass over the roof overhang is ___.

The minimum vertical clearance for 208Y/120-volt, three-phase service-drop conductors in a commercial area subject to minimal truck traffc is ___ feet.

Conductor overload protection is not required if ___.

Which of the following statements about supplementary overcurrent protection is correct?

A current-limiting overcurrent protective device is a device that will ___ the current fowing in the faulted circuit.

Which of the following is a standard size fuse?

The largest standard rating for an inverse time circuit breaker is ___ amperes.

Given: You have tenant spaces in a mall; each occupant shall have access to the main disconnecting means, except where ___.

Overcurrent devices shall be enclosed in ___.

I. cabinets II. cutout boxes

Plug fuses and fuseholders can be used in circuits supplied by a system having a grounded neutral point and having no conductor at over ___ volts to ground.

Plug fuses of the Edison-base type shall be used ___.

Circuit breakers shall be marked with their ampere rating in a manner that will be ___ after installation.

I. accessible II. durable III. visible

Inverse time circuit breakers that have an interrupting rating other than ___ amperes, shall have the interrupting rating indicated on the breaker.

A two-pole circuit breaker that may be used for protecting a 3 phase, corner-grounded delta circuit shall be marked ___.

Where an equipment bonding jumper is installed on the outside of a raceway, the length shall not exceed ___ feet and shall be routed with the raceway or enclosure.

In nonmetallic sheathed cable, the equipment grounding conductor for 15-, 20-, and 30-ampere branch-circuits ___.

A(n) ___ shall be used to connect the grounding terminal of a grounding type receptacle to a grounded box.

What size copper equipment grounding conductor is required for a circuit having a 40-ampere overcurrent device?

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When an electrical service is required to have a grounded conductor present, what is the smallest grounded conductor permitted for an electric service using 1000 kcmil copper ungrounded conductors?

A grounding electrode conductor shall not be required for a system that supplies a ___ circuit and is derived from a transformer not more than 1000 VA.

Given: A metal underground water pipe is used as a grounding electrode and used to bond other electrodes together. The grounding electrode conductor is connected to the water pipe on the interior of the building. The connection of the grounding electrode conductor to the interior water pipe shall be made a maximum of ___ feet from the point where the water pipe enters the building.

A grounding ring encircling the building, in direct contact with the earth, must consist of at least ___ feet of bare copper conductor not smaller than 2 AWG.

Electrodes of steel or iron shall have a diameter of at least ___.

Where more than one grounding electrode is used, each electrode of one grounding system (including that used for air terminals) shall not be less than ___ feet from any otherelectrode of another grounding system.

A single, made grounding electrode shall have a maximum resistance to ground of ___ ohms.

A single electrode consisting of a ___ which does not have a resistance to ground of 25 ohms or less shall be augmented by one additional electrode.

I. rod II. pipe III. plate

Where used outside, aluminum or copper-clad aluminum grounding conductors shall not be terminated within ___ inches of earth.

A 600-amp main breaker service panelboard is fed with four parallel sets of 1/0 kcmil copper. What is the smallest copper grounding electrode conductor that can be installed to the steel structure?

What size copper grounding electrode conductor is required for a 1500 kcmil copper service conductor?

To ensure effective continuity between enclosures, ___ shall be removed from the conduit threads.

An equipment bonding jumper on the supply side of the service must not be smaller than the sizes shown in Table ___.

A single family dwelling has a 200-amp, 120/240-volt, single-phase, main service panel and is being fed with 2/0 AWG THW copper ungrounded service entrance conductors in rigid metal conduit. The minimum allowable size of the MBJ for this service entrance conduit is ___.

Which of the following is not a true statement per the National Electrical Code?

All conductors of a circuit are required to ___.

I. be in the same raceway

II. be installed in close proximity in the same trench

III. be the same size

In both exposed and concealed locations, where a cable or raceway-type wiring method is installed through bored holes in joists, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than ___ inch(es) from the nearest edge of the wood member.

Bored holes in wood members for cable or raceway-type wiring shall be bored so that the edge of the hole is not less than ___ from the nearest edge.

Electrical installations in hollow spaces, vertical shafts, and ventilation or air-handling ducts shall be so made that the possible spread of fire or products of combustion will not be ___.

Type UF cable, buried underground at a one-family dwelling and fed from a 15-ampere, ground-fault circuit-interrupter circuit, must have a minimum cover of ___ inches.

When installing a 20-amp, 120 volt, GFCI-protected, below-ground UF cable branch circuit that serves a yard light for a residence, what is the minimum ground cover required for the cable?

Underground cable installed under a building shall be in a ___ that is extended beyond the outside walls of the building.

Underground service conductors carried up a pole must be protected from mechanical injury to a height of at least ___ feet.

When direct-buried conductors emerge from the ground and extend up a pole, these must be protected by enclosures or raceways to a height of ___ feet above finished grade.

Backfill used for underground wiring must not ___.

Where installing direct-buried cables, a ___ shall be used at the end of a conduit that terminates underground.

I. splice kit II. bushing III. terminal fitting

Conduit used to protect direct-buried cable shall be provided with a ___ where the cable leaves the conduit underground.

Where nails or screws are likely to penetrate electrical nonmetallic tubing installed through metal framing members, a steel sleeve, steel plate, or steel clip not less than ___ inch in thickness shall be used to protect the cable or tubing.

When directly buried outdoors, rigid metal conduit must have at least ___ inches of cover.

What is the minimum burial depth of intermediate metal conduit, containing conductors 600 volts or less, under a residential gravel driveway?

Where raceways are exposed to widely different temperatures, they shall be ___.

The number and size of conductors in any raceway shall not be more than will permit ___.

I. ready installation or withdrawal of the conductors without damage to the conductors or to their insulation

II. dissipation of the heat

In vertical raceways, 3/0 AWG aluminum conductors must be supported if the vertical rise is greater than ___ ft.

Where conductors carrying alternating current are installed in ferrous metal raceways, they shall be arranged so as to avoid heating the surrounding metal by ___.

The number of conductors permitted in raceways is limited to ___.

Suitable covers shall be installed on all boxes, f ttings, and similar enclosures to prevent accidental contact with ___ parts or physical damage to parts or insulation. (Over 1000 volts, nominal.)

Conductors of ac and dc circuits, rated 600 volts, nominal, or less, shall be permitted to occupy the same equipment wiring enclosure if ___.

Electrical installations in hollow spaces, vertical shafts, and ventilation or air-handling ducts must be made so that the possible spread of fre or products will not be ___.

The air-handling area beneath raised foors for information technology equipment ___ a plenum and ___ required to comply with the requirements of 300.22 but shall be permitted in accordance with Article 645.

Generally, the ungrounded conductor of an electrical branch circuit is identified by ___ color.

Where installed in raceways, conductors of size ___ AWG and larger shall be stranded.

Among the conductors listed below, all except ___ are permitted to be connected in parallel.

The parallel conductors in each phase, neutral, or equipment grounding conductor shall ___.

Conductors shall not be installed in locations where the operating temperature will exceed that specified for the type of ___ used.

Adjacent load-carrying conductors have the dual effect of raising the ___ and impeding heat dissipation.

Type XHHW insulated conductors may be used in ___.

Thermoplastic insulated fixture wire shall be durably marked with the AWG size, voltage rating and other required markings on the surface at intervals not exceeding ___ inches.

Which of the following listed conductors has a greater ampacity when used in a dry location compared to when used in a wet location?

A nipple contains six 6 AWG THW copper current-carrying conductors. The ampacity of each conductor would be ___ amperes.

When conductors are installed in a nipple ___ inches or less, the ampacity adjustment factors for more than 3 current-carrying conductors in a raceway need not be applied.

As a minimum, a three-wire, 120/240-V single-phase 200 amp service for a dwelling requires ___ AWG THW copper conductors.

Determine the conductor ampacity given the following.

* conductors are 500 kcmil THWN copper

* ambient temperature is 125 degrees F.

* eight current carrying conductors are in the raceway

When a conduit contains six current-carrying conductors and is installed in a 22ºC dry location, the allowable ampacity of each of the six 750 kcmil XHHW aluminum conductors is ___ amps.

A fixture rated at 7 amps requires a size ___ AWG fixture wire, as a minimum.

The minimum size copper conductor for voltages up to 2,000V is ___ AWG.

Which of these conductors is not permitted in wet locations?

What is the ampacity of 8 AWG XHHW copper in a wet location?

The ampacity of conductors must be adjusted (decreased) when the ambient temperature exceeds ___°F

What is the ampacity of four 1/0 AWG THW current-carrying copper conductors installed in a raceway in an ambient temperature of 86°F?

A raceway is 17” in length and contains four 6 AWG THW copper current-carrying conductors. The ampacity of each conductor is ___ amperes.

What is the minimum size copper SE cable with 75°C conductors that may be used for a 150A, 120/240-volt, single phase, dwelling unit service?

For a 100 to 400A, 120/240 volt, single-phase dwelling unit service, the service conductors are permitted to have an ampacity of not less than ___ percent of the service rating.

A neutral conductor that carries only the ___ current from other conductors of the same circuit shall not be required to be counted as a current-carrying conductor when applying the provisions of 310.15(C)(1).

Conductors with thermoplastic and f brous outer braid Type TBS insulation are used for wiring ___.

A dwelling has a 225-ampere service that is fed with THW copper conductors. The minimum size copper grounding electrode conductor to the metal water pipe is ___ AWG.

Type MV cables shall be permitted for use on power systems rated up to ___ volts.

Where raceways or cables enter above the level of uninsulated live parts of a cabinet, cutout boxes, or meter socket enclosure in a wet location, a ___ shall be used.

Metallic surface-type cabinets in damp or wet locations shall have at least ___ airspace between the cabinet and the wall or other supporting surface.

Noncombustible surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than ___ at the edge of a cabinet or cutout box employing a flush-type cover.

Nonmetallic cables can enter the top of surface-mounted cabinets, cutout boxes, and meter socket enclosures through nonflexible raceways not less than 18 in. or more than ___ in length if all of the required conditions are met.

Conductors feeding through the wiring space or enclosures for switches or overcurrent devices shall not exceed ___ percent of the cross-sectional area of that space.

Cabinets and cutout boxes shall be deep enough to allow the closing of the doors when ___-ampere branch-circuit panelboard switches are in any position, when combination cutout switches are in any position, or when other single-throw switches are opened as far as their construction permits.

Which answer best completes the following sentence describing the Code requirements for the use of short-radius, capped elbow conduit bodies containing conductors smaller than 6 AWG? Capped elbow type conduit bodies ___.

Nonmetallic boxes shall be suitable for the lowest ___ conductor entering the box.

The front edge of a switch box installed in a wall constructed of wood shall be ___ from the surface of the wall.

Enclosures supported by suspended ceiling systems shall be fastened to the framing member by mechanical means such as ___.

I. clips identified for use II. screws III. rivets IV. bolts

The internal depth of outlet boxes intended to enclose flush devices shall be at least ___.

Luminaires shall be supported independently of the outlet box where the weight exceeds ___ pounds unless the outlet box is listed and marked for the maximum weight to be supported.

Where permanent barriers are installed in a junction box, each section shall be considered as a(n) ___.

The minimum thickness for a cast aluminum box measuring 6" X 4" X 3 1/2" is ___ inches.

A means shall be provided in each metal box over 100 cubic inches for the connection of an equipment grounding conductor. The means shall be permitted to be ___.

I. a tapped hole

II. the cover screw

III. a screw used to mount the box

For systems over 1000 volts, the distance between each cable or conductor entry inside the box and the opposite wall of the box shall not be less than ___ times the outside diameter, over sheath, of the largest cable or conductor.

How many 14 AWG THW conductors are permitted in a 3" X 2" X 21/2" device box?

A 3" X 2" X 2" device box has a volume of ___ cubic inches.

The MAXIMUM number of 10 AWG conductors permitted in a 4" X 11/4" octagon metal junction box is ___.

How many 12/2 AWG with ground, type NM cables are permitted to be installed in an outlet box that is 18 cubic inches and has a duplex receptacle installed in the box?

For the purpose of determining box fill, 12 AWG THWN copper wire is to be calculated at ___ cu. in.

A device box contains four 10 AWG conductors and four 12 AWG conductors. Assuming each conductor carries current, for the purposes of determining box fill, these conductors are equivalent to ___ cubic inches.

When two switches are mounted on the same strap, the number of conductors allowed in the box shall be reduced by a minimum of ___ conductors.

How many 12 AWG conductors may be installed in a 3 1/2" deep, 3-gang masonry box that contains three switches?

Angle pull dimensional requirements apply to junction boxes only when the size of conductors is equal to or larger than ___ AWG.

A 2 in. raceway is to be installed in a pull box for a straight pull; conductors are 4 AWG or larger. What is the MINIMUM length of the pull box as required by the NEC®?

What is the maximum number of 10 AWG conductors permitted in a 4” x 1 1/2” octagon metal box?

A device box contains four 10 AWG conductors and four 12 AWG conductors. Assuming each conductor carries current, for the purposes of determining box fill, these conductors are equivalent to ___ cubic inches.

How many 12 AWG conductors may be installed in a 3 1/2” deep, 3-gang masonry box with a marked capacity of 63 cubic inches that contains three switches?

A metal outlet box has 27 cubic inches and contains a total of six 12 AWG wires. How many 10 AWG conductors may be added to the box?

Where NM cable is used with a nonmetallic box, the cable sheath must extend into the box not less than ___ beyond any cable clamp.

In combustible walls or ceilings, how far is the front edge if an outlet box or fitting permitted to be set back from the finished surface?

In noncombustible walls or ceilings, how far is the front edge of an outlet box or fitting permitted to be set back from the finished surface?

Vertically-mounted luminaires weighing up to ___ pounds can be supported by boxes not specifically designed to support luminaires, provided the luminaire or its supporting yoke is secured to the box with at least two No. 6 or larger screws.

A luminaire mounted in a ceiling must be supported independently of the outlet box if it weighs more than ___ pounds, unless the outlet box is listed and marked for the maximum weight to be supported.

In pull boxes or junction boxes having any dimension over ___ inches, all conductors shall be cabled or racked up in an approved manner.

Angle pull dimensional requirements apply to junction boxes with conductors ___ AWG or larger.

In straight pulls, the length of the box shall not be less than ___ times the trade diameter of the largest raceway for conductors 4 AWG and larger.

When a pull box contains conductors of a 4 AWG and larger and an angle pull of the conductors is to be made, the length of the box shall not be less than ___ times the trade diameter of the largest raceway entering the box.

Handhole enclosures shall be ___ for use in underground systems.

In inches, what is the maximum distance that a receptacle wall box can be set back from the finished surface of a 1/4-inch wood-paneled wall?

A luminaire that weighs more than ___ pounds shall be supported independently of the outlet box unless the outlet box is listed for the weight to be supported.

A luminaire shall be supported independently of the outlet box when it weighs more than ___ pounds unless the outlet box is listed and marked for the maximum weight to be supported.

Which of the following may not be used in damp or wet locations?

When armored cable is installed in thermal insulation, the rating of the contained conductors shall be ___, and the ampacity of these applications shall be that of ___ conductors.

Type AC cable is permitted for which of these?

Where run across the top of floor joists, or within ___ feet of the floor, AC cable installed across the face of rafters must be protected by substantial guard strips that are at least as high as the cable for attics with permanently installed stairs

Type AC cable must be secured within ___ inches of every outlet box.

Type AC cable must be supported by staples, cable ties, straps, hangers, or similar fitting at intervals not exceeding ___ feet.

Type AC cable must have an internal bonding strip of ___ in intimate contact with the armor.

Voltage between the hot (ungrounded) conductors on FCC cable shall not exceed ___ volts.

Metal components of the FCC system shall be ___.

I. insulated from contact with corrosive substances

II. coated with corrosion-resistant materials

III. corrosion-resistant

Type MC cable shall be supported and secured at intervals not exceeding ___.

Where Type MI cable terminates, an end seal fitting shall be provided immediately after stripping to prevent the entrance of ___ into the insulation.

Where run across the top of floor joists, or within ___ feet of the floor or floor joists across the face of rafters or studding, in an attic that has permanent stairs, nonmetallic sheathed cable must be protected by substantial guard strips that are at least as high as the cable.

___ of insulating material shall be permitted to be used without boxes in exposed cable wiring.

I. Switch devices II. Outlet devices III. Tap devices

When installing 2" rigid metal conduit with threaded fittings, the NEC® requires the maximum distance between supports to be no more than ___.

In existing buildings where the nonmetallic sheathed cable is concealed, listed interconnector devices of insulating material shall be permitted to be used without boxes ___.

The ampacity of UF cable shall be that of ___ degree C conductors.

Type UF cable and associated ___ shall be listed.

Which of these is (are) a permitted use of type UF cable?

The ampacity of type UF cable shall be that of ___ °C conductors in accordance with 310.15.

For industrial machinery, straight exposed vertical risers of intermediate metal conduit with threaded couplings are permitted if supported at the top and bottom no more than ___ feet apart.

A section of 3/8" flexible metallic conduit is permitted for tap conductors when connecting to light fixtures, provided the length of the flex does not exceed ___.

In an underground polyvinyl chloride conduit system that consist of a 20-ft. length between pulling points, what is the maximum number of bends that this run may have?

Aluminum fittings and enclosures shall be permitted to be used with steel EMT where not subject to ___.

The maximum size of flexible metallic tubing is trade size ___.

Electrical nonmetallic tubing shall be clearly and durably marked at least every ___ feet.

Which of the following statements, if either, is true regarding the overcurrent protection of busways?

I. A busway rated for 1800 amps is permitted to be protected with a 2000-amp breaker.

II. A busway rated for 1400 amps is permitted to be protected with a 1600-amp breaker.

A 300-foot run of 800-amp busway is installed in a commercial warehouse building. The last 20′ of the busway run is reduced to a bus rating of 200 amps. Which of the following best describes the requirement for installation of the smaller bus?

For industrial establishments only, omission of overcurrent protection shall be permitted at points where busways are reduced in size, provided that the smaller busway does not extend more than 50 feet and has a current rating at least equal to ___ the rating or setting of the overcurrent device next back on the line.

A fexible cord connection is made directly to the load end terminals of a busway plug-in device. The maximum length of this cord to a tension take-up device is ___ feet.

The size and number of conductors shall be that for which the cablebus is designed, and not smaller than ___.

When an outlet is removed from a cellular metal floor raceway, the sections of circuit conductors supplying the outlet shall be ___.

Except by special permission, no conductor larger than ___ shall be installed in cellular metal floor raceways.

Nonmetallic surface extensions must be secured in place by approved means at intervals not exceeding ___ inches.

When calculating the conductor fill for strut-type channel raceway with external joiners, the raceway shall be permitted to be filled to ___ percent of the cross-sectional area.

In general, the voltage limitation between conductors in surface metal raceways is ___ volts.

When an outlet from an underfloor raceway is discontinued, the sections of the circuit conductors supplying the outlet ___.

Messenger supported wiring shall not be used ___.

I. where subject to severe physical damage

II. in hoistways

Flexible cords and cables shall NOT be ___.

Flexible cords ___ AWG and larger are used to supply approved appliances and are considered protected from overcurrent by overcurrent devices.

The identification of the grounded conductor in a flexible cord shall be permitted to be by ___.

Electric vehicle cable type EVJ ___.

I. is available in sizes 18 AWG to 500 kcmil

II. is rated for extra hard usage

III. has thermoset insulation

What is the maximum allowable ampacity of 14/2 AWG SJT cord?

The fixture wires listed in Table 402.3 are all suitable for service at ___ volts, nominal, unless otherwise specified

The smallest fixture wire permitted is ___.

Fixture wires shall not be used as ___ conductors except as permitted elsewhere in the code?

When used as a switch, the height of a circuit breaker shall not exceed ___ above the foor.

Given: You have a 2-gang box that contains two single-pole switches; unless the box is equipped with permanently installed barriers, the voltage between the switches shall not be in excess of ___ volts.

Non-grounding-type receptacles shall be permitted to be replaced with another ___ type receptacle.

A nongrounding-type receptacle has been replaced with a new grounding-type duplex receptacle. The 15-ampere circuit breaker feeding the circuit has been replaced with a 15-ampere GFCI breaker. The new receptacle must be marked “___.”

I. Two-Wire Circuit

II. No Equipment Ground

III. GFCI Protected

Receptacle faceplate covers made of insulating material shall be noncombustible and not less than ___ inch in thickness.

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Receptacles connected to circuits having different voltages, frequencies, or types of current (ac or dc) on the ___ shall be of such design that the attachment plugs used on these circuits are not interchangeable.

A receptacle shall be considered protected from the weather when located under roofed open porches, canopies, marquees, and the like where it will not be subject to ___.

The minimum wire bending space required at the top and bottom of a panelboard that has three 3/0 AWG conductors connected to each busbar is ___.

Luminaires shall not be used as a raceway for circuit conductors unless ___ for use as a raceway.

I. listed II. approved III. marked

A luminaire that weighs more than 6 pounds or exceeds ___ inches in any dimension shall not be supported by the screw shell of a lampholder.

A luminaire installed outdoors is permitted to be supported by ___.

I. trees II. a metal pole III. an outlet box

The rating of any one cord-and-plug-connected utilization equipment not fastened in place shall not exceed ___ % of the branch-circuit ampere rating.

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No parts of pendants shall be located within a zone measured ___ feet horizontally and 8 feet vertically from the top of the bathtub rim.

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Incandescent luminaires that have open lamps and pendant-type luminaires ___ be installed in clothes closets where proper clearance is maintained from combustible contents.

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Surface-mounted fluorescent luminaires in clothes closets can be installed on the wall above the door or on the ceiling, provided there is a minimum clearance of ___ inches between the luminaire and the nearest point of a storage space.

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A recessed incandescent luminaire with a solid lens is installed in the ceiling of a clothes closet. This luminaire must ___.

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Coves for luminaires shall have adequate space and shall be so located that the lamps and equipment can be properly installed and ___.

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The maximum weight of a luminaire that may be mounted by the screw shell of a brass socket is ___ pounds.

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Built-in dishwashers and trash compactors intended for dwelling use are allowed to be cord-and-plug-connected when ___.

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What is the maximum allowable cord length for a cord-and-plug-connected dishwasher installed under a counter in a dwelling unit?

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A permanently connected dishwasher has a nameplate rating of 780 volt-amperes. The circuit breaker is permitted to serve as the disconnecting means where it is ___.

I. within sight from the dishwasher

II. capable of being locked in the closed position

III. capable of being locked in the open position

Water heaters having a capacity of ___ gallons or less shall have a branch-circuit rating not less than 125% of the rating of the water heater.

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If a switch or circuit breaker serves as the disconnecting means for a permanently connected motor-driven appliance of more than ___ horsepower, it shall be located within sight from the motor controller.

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The maximum overcurrent device permitted to protect a 208-V, 5 kW appliance connected with 8 AWG copper is ___ amps.

All heating elements that are ___ and part of an appliance shall be legibly marked with the ratings in volts and amperes, or in volts and watts, or with the manufacturer’s part number.

I. replaceable in the field

II. rated over one ampere

III. rated over 150 volts

Where a GFCI receptacle is used to provide power for an electric drinking fountain, the NEC ® requires the receptacle to be ___.

A 240-volt, 20-amp circuit may supply ___ linear feet of electric baseboard heat. The baseboard heaters being used are rated at 250 watts per linear foot at 240 volts.

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Given: A fixed electric space heater without a motor is installed in a multifamily dwelling.

· The heater has no supplementary overcurrent protection.

· The heater is controlled with a thermostat which does not have a marked "off" position.

· The branch-circuit switch or circuit breaker is not "within sight from" the heater.

For the branch-circuit switch or circuit breaker to be permitted to serve as the disconnecting means for the heater, the switch or breaker must ___.

Means shall be provided to simultaneously disconnect the ___ of all f xed electric space-heating equipment from all ungrounded conductors.

I. heater

II. motor

III. motor controllers

IV. supplementary overcurrent protective devices

Electrically heated floors in kitchens, bathrooms and hydromassage bathtub locations shall be ___.

The total rating of a plug-connected room air conditioner where lighting units or other appliances are also supplied shall not exceed ___ percent.