2020 NEC

Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets for dwelling unit wall spaces, unless they are located within _____ in. of the wall.

"18 in." 210.52(A)(3)

Handhole enclosure covers shall require the use of tools to open, or they shall weigh over _____.

"100 lb." 314.30(D)

Each current-carrying conductor of a paralleled set of conductors shall be counted as a current-carrying conductor for the purpose of applying the adjustment factors of 310.15(C)(1)).

"True" 310.15(C)(1)

Single-conductor cable Type USE-2 and RHW-2 cable _____ sunlight resistant can be run exposed at outdoor locations for PV source circuits within the PV array.

"marked" 690.31(C)(1) and (C)(1)(2)

Supply service drops and sets of overhead service conductors of 0 volts to 750 volts running above and parallel to communications and CATV type coaxial service drops shall have a minimum separation of _____ in. at any point in the span.

12 in. 800.44(A)(4)

Raceways on exteriors of buildings or other structures shall be arranged to drain and shall be _____ for use in wet locations.

225.22 "listed or approved"

Coaxial cable is a cylindrical assembly composed of a conductor centered inside a metallic tube or shield, separated by a(n) _____ material and usually covered by an insulating jacket.

Art. 100 Cable, Coaxial dielectric

A dc circuit that is comprised of two monopole circuits, each having an opposite polarity connected to a common reference point is known as a _____.

Bipolar Circuit 690.2

For permanently connected motor-operated appliances with motors rated over _____, a switch or circuit breaker located within sight from the motor-operated appliance or be capable of being locked in the open position in compliance with 110.25, can serve as the appliance disconnect.

"1/8 hp" 422.31(C)

Branch-circuit conductors for fixed electric space-heating equipment and any associated motors shall be sized not smaller than _____ percent of the load.

"125%" 424.4(B)

Where supply cords of listed information technology equipment are installed under a raised floor, they shall not be longer than _____ ft.

"15 ft." 645.5(B)(1)

All receptacles supplied by branch circuits rated _____volts or less to ground within a pool equipment room shall be GFCI protected.

"150V" 680.22(A)(5)

The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s) are known as "_____ conductors."

"Branch Circuit" Art. 100

Information technology equipment branch circuit supply conductors under a raised floor shall be permitted to be installed only in an electrical metallic tubing (EMT) raceway.

"False" 645.5(E)(1)) (b)(1) through (17)

In accordance with Article 680, the definition of a "fountain" includes drinking water coolers.

"False" 680.2 Fountain

Receptacles rated 30A or less, 125V located within 10 ft of the inside walls of an indoor spa or hot tub, shall be _____.

"GFCI protected" 680.43(A)(2)

Facilities covered by Article 691 have specific design and safety features unique to large-scale _____ and are operated for the sole purpose of providing electric supply to a system operated by a regulated utility for the transfer of electric energy.

"PV facilities" 691.1 Informational Note 1

A rigid nonmetallic raceway of circular cross-section, with integral or associated couplings, connectors, and fittings for the installation of electrical conductors and cables describes _____.

"PVC" 352.2

_____ at other than dwelling units shall be legibly field marked with the maximum available fault current, include the date the fault-current calculation was performed, and be of sufficient durability to withstand the environment involved.

"Service equipment" 110.24(A)

Fixed, mobile, or portable electric signs, section signs, outline lighting, photovoltaic (PV) powered signs, and retrofit kits shall be _____, unless otherwise approved by special permission.

"listed and labeled" 600.3

An SPD shall be a (an) _____ device.

"listed" 242.8 *Note that for 2020, former Articles 280 and 285 have been relocated and merged into new Article 242.

Power-limited fire alarm cables installed within buildings shall be _____ as being resistant to the spread of fire.

"listed" 760.179

Where a building has multiple feeders, a permanent _____ shall be installed at each feeder disconnect location denoting all other services and feeders and the area served by each.

"plaque or directory" 225.37

In accordance with Article 690, a functionally grounded system has an electrical ground reference for operational purposes that is not _____ grounded.

"solidly" 690.2, Grounded, (Functionally)

For PV systems, the dc circuit conductors between modules and from modules to dc combiners, electronic power converters, or a dc PV system disconnecting means are known as the PV _____ circuit.

"source" 690.2 PV Source Circuit

Barriers shall be placed in service equipment such that no uninsulated, ungrounded service busbar or service _____ is exposed to inadvertent contact by persons or maintenance equipment while servicing load terminations.

"terminal" 230.62(C)

Grounding electrode conductors and grounding electrode bonding jumpers in contact with _____ shall not be required to comply with 300.5 but shall be buried or otherwise protected if subject to physical damage.

"the earth" 250.64(B)(4)

Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so _____.

"the purpose is evident" 110.22(A)

A motor disconnecting means can be a listed _____.

1. Motor-circuit switch rated in horsepower 2. molded case switch 3. molded case circuit breaker 430.109(A)(1), (2), and (3)

Exposed runs of cable, except as provided in 300.11(A), shall closely follow the surface of the _____.

1. building finish 2. running boards 3. the underside of joists 330.15

Electrical equipment shall not be connected to the supply side of the service disconnecting means, except for a few specific exceptions such as _____.

1. taps used to supply standby power systems, fire pump equipment, fire and sprinkler alarms, and load (energy) management devices. 2. Type 1 surge-protective devices. 3. solar photovoltaic systems. 230.82(4), (5), and (6)

Trade size 1 IMC run straight with threaded couplings shall be supported at intervals not exceeding _____ ft.

12 ft. 342.30(B)(2) and Table 344.30(B)(2)

Raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, elbows, couplings, fittings, supports, and support hardware shall be of materials suitable for _____.

300.6 the environment in which they are to be installed

Ground-fault circuit-interrupter protection for personnel shall be provided for cables installed in electrically heated floors of _____.

424.44(E) "all of these"

Article 514 applies to motor fuel dispensing facilities, marine/motor fuel dispensing facilities, motor fuel dispensing facilities located inside buildings, and _____ vehicle motor fuel dispensing facilities.

514.1 "fleet"

Replacement electrical connections shall be located at least _____ in. above the deck of a floating pier.

555.30(C) "24 in."

Field-installed skeleton tubing lighting shall not be required to be _____ where installed in conformance with the Code.

600.3(A) "listed"

Facilities with standalone systems shall have _____ installed in accordance with 710.10.

690.56(A) "plaques or directories"

For PV dc circuits connected to the output of two or more parallel-connected dc-to-dc converters. The maximum voltage shall be determined in accordance with the instructions included in the listing or labeling of the dc-to-dc converter.

690.7(B)(2) "False"

Stand-alone system plug-in type backfed circuit breakers connected to an interconnected supply shall be secured in accordance with 408.36(D).

710.15(F) True

Nonconductive optical fiber cables shall not be permitted to occupy the same cabinet, outlet box, panel, or similar enclosure unless the nonconductive optical fiber cables are functionally associated with the electric circuits.

770.133(B) and (B)(1) "True"

Article _____ covers the electrical conductors and equipment installed within or on mobile and manufactured homes and the conductors that connect mobile and manufactured homes to a supply of electricity.

ARTICLE 550 Mobile Homes, Manufactured Homes, and Mobile Home Parks - 550.1 Scope

A "_____" is an accommodation that combines living, sleeping, sanitary, and storage facilities within a compartment.

Art. 100 "Guest Room"

An enclosure constructed so that moisture will not enter the enclosure under specific test conditions is called "_____."

Art. 100 Watertight

Electric-discharge and LED luminaires supported independently of the outlet box shall be connected to the branch circuit through _____.

Raceways Type MC, AC, Mi, or NM Cable Flexible Cord 410.24(A)

The ampacity of 18 TFFN is _____.

"6A" 402.5 and Table 402.5

Where conductors in parallel are run in separate raceways, the raceways shall have the same electrical characteristics.

"True" 310.10(G)(3)

The term mobile home includes manufactured homes unless otherwise indicated.

"True" 550.2 Mobile Home

The disconnecting means for a sign or outline lighting system shall be permitted to be located at the point of entry to a sign and the disconnect shall be located at the point the feeder circuit or branch circuit(s) supplying a sign or outline lighting system enters a _____.

"any of these" 600.6(A)(1)

Where a method to reduce clearing time for fuses rated 1200A or greater is required in accordance with 240.67(B), the _____ reduction system shall be performance tested when first installed on site.

"arc-energy" 240.67(C)

Cable ties used to securely fasten flexible metal conduit shall be _____ for securement and support.

"listed and identified" 348.30(A)

For temporary installations, cable assemblies, flexible cords, and flexible cables shall be supported by _____ or similar fittings so as not to damage the wiring.

1. Staples 2. Cable ties 3. Straps 590.4(J)

Hallways in dwelling units that are _____ ft long or longer require a receptacle outlet.

10 ft. 210.52(H)

Where there are two or more air-conditioning units served by the same feeder, it shall be permissible to apply a dwelling unit appliance load demand factor of 75%.

"False" 220.53(4)

Metal enclosures and raceways for other than service conductors shall be connected to the neutral conductor.

"False" 250.86

Listed low-voltage lighting systems or a lighting system assembled from listed parts shall be permitted to be reconditioned.

"False" 411.4

When calculations in Article 220 result in a fraction of an ampere that is less than _____, such fractions can be dropped.

"0.50" 220.5(B)

If a branch circuit supplies a single nonmotor-operated appliance, the rating of overcurrent protection shall not exceed _____ if the overcurrent protection rating is not marked and the appliance is rated 13.30A or less.

"20A" 422.11(E)(2)

Receptacles shall not be installed within a zone measured _____ horizontally and 8 ft vertically from the top of the bathtub rim or shower stall threshold.

"3 ft." 406.9(C)

EMT run in unbroken lengths between termination points are permitted to be securely fastened within _____ft of each outlet box, junction box, device box, cabinet, conduit body, or other tubing termination where structural members do not readily permit fastening.

"5 ft." 358.30(A) Ex 1

Article 555 covers marinas, boatyards, docking facilities but not floating buildings.

"False" 555.1

Part I of Article 100 contains definitions intended to apply wherever the terms are used throughout this Code. Part III of Article 100 contains definitions for _____.

"Hazardous (Classified) Locations" Article 100 Scope

Feeder conductors shall be permitted to be sized at 100 percent of the continuous and noncontinuous load where a portion of the feeder is connected at both its supply and load ends to separately installed pressure connections.

"True" 215.2(A)(1)(a) Ex. 2

Equipment grounding conductors for feeder taps are not required to be larger than the tap conductors.

"True" 250.122(G)

Load side equipment such as the frames of ranges or dryers in existing installations are permitted to be connected to the grounded circuit conductor.

"True" 250.142(B) Ex. 1

Reinforcing bars for use as a concrete-encased electrode can be bonded together by the usual steel tie wires or other effective means.

"True" 250.52(A)(3)(1)

Two or more grounding electrodes bonded together are considered a single grounding electrode system.

"True" 250.53(B) and 250.58

Ferrous metal raceways and enclosures for grounding electrode conductors shall be electrically continuous from the point of attachment to cabinets or equipment to the grounding electrode.

"True" 250.64(E)(1)

Direct-buried conductors or cables can be spliced or tapped without the use of splice boxes.

"True" 300.5(E), 110.14(B)

No conductor shall be used where its operating temperature exceeds that designated for the type of insulated conductor involved.

"True" 310.14(A)(3)

Horizontal runs of IMC supported by openings through framing members at intervals not exceeding 10 ft and securely fastened within 3 ft of terminations shall be permitted.

"True" 342.30(B)(4)

A fabricated assembly of insulated conductors in a flexible interlocked metallic armor describes _____.

"Type AC cable" 320.2 Armored Cable (Type AC)

Conductors in raceways shall be _____ between outlets, boxes, devices, and so forth.

"continuous" 300.13(A)

Stainless steel and aluminum fittings and enclosures shall be permitted to be used with galvanized steel RMC, and galvanized steel fittings and enclosures shall be permitted to be used with aluminum RMC where not subject to _____.

"severe corrosive influences" 344.14

In a 3-wire circuit consisting of two-phase conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected system, the neutral conductor _____ when applying the provisions of 310.15(C)(1).

"shall be counted" 310.15(E)(2) 310.15(E) Neutral Conductor. Neutral conductors shall be considered current-carrying in accordance with any of the following: (2) In a 3-wire circuit consisting of two-phase conductors and the neutral conductor of a 4-wire, 3-phase, wye-connected system, a common conductor carries approximately the same current as the line-to-neutral load currents of the other conductors and shall be counted when applying the provisions of 310.15(C)(1).

When PVC conduit extends from the pool light forming shell to a pool junction box for a wet-niche luminaire, an 8 AWG _____ bonding jumper shall be installed in the raceway.

"solid or stranded insulated copper" 680.23(B)(2)(b)

Where a load management system is employed that will automatically manage the connected load of an optional standby system, the standby source shall have a capacity sufficient to supply _____ that will be connected by the load management system.

"the maximum load" 702.4(B)(2)(a)

Enclosures not over 100 cu in. having threaded entries and not containing a device shall be considered to be adequately supported where _____ or more conduits are threaded wrench-tight into the enclosure and each conduit is secured within 3 ft of the enclosure.

"two" 314.23(E)

Type USE cable is permitted for _____ wiring.

"underground" 338.10(B)(4)(b)(2), 338.12(B)(1), (2), and (3)

Replacement luminaires shall be permitted to connect an equipment grounding conductor in the same manner as replacement receptacles.

"True" 410.44 Ex. 1

For interconnected power production source(s), installation of one or more electrical power production sources operating in parallel with a primary source(s) of electricity shall be performed only by _____.

"qualified persons" 705.8

Article 440 applies to electric motor-driven air-conditioning and refrigerating equipment that has a hermetic refrigerant motor-compressor.

"True" 440.1

The manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product can be identified shall be _____.

"placed on all electrical equipment" 110.21(A)(1)

Where two or more explosionproof enclosures that require conduit seals are connected by nipples or runs of conduit not more than _____ in. long, a single conduit seal in each such nipple connection or run of conduit shall be considered sufficient if the seal is located not more than 18 in. from either enclosure.

"36 in." 501.15(A)(3)

Article 691 covers the installation of large-scale PV electric supply stations with a generating capacity of not less than _____ kW and not under the electric utility control.

"5,000 kW" 691.1

A conductor installed on the supply side of a service or within a service equipment enclosure, or for a separately derived system, to ensure the required electrical conductivity between metal parts required to be electrically connected is known as the "_____."

"Bonding Jumper, Supply-Side" Art. 100

Rated current for Class _____ power sources for conductors covered in 725.144 is the output current per conductor the power source is designed to deliver to an operational load at normal operating conditions, as declared by the manufacturer.

"Class 2 and 3" 725.121(C) Informational Note

Where practicable, contact of dissimilar metals shall be avoided in an IMC raceway installation to prevent the possibility of _____.

"galvanic action" 342.14

Article 517 applies to electrical construction and installation criteria in health care facilities that provide services to _____.

"human beings" 517.1

An electrically powered lift that provides accessibility to and from a pool or spa for people with disabilities is known as an "electrically powered _____ lift."

"pool" 680.2 Electrically Powered Pool Lift

Class 2, Class 3, and Type PLTC cables shall be permitted to be installed in plenum cable routing assemblies, riser cable routing assemblies, and general purpose cable routing assemblies when _____.

1. listed in accordance with the provisions of 800.182 2. selected in accordance with Table 800.154 3. installed in accordance with 800.110 and 800.113 725.3(M)

When replacing automatically controlled receptacles, if automatic control is no longer required, the receptacle and any associated receptacles marked in accordance with 406.3(E) shall be replaced with a receptacle and faceplate marked in accordance with 406.3(E).

"False" 406.4(D)(7)

All equipment intended for use in PV power systems shall be _____ for the PV application.

"field labeled or listed" 690.4(B)

In dwelling units, all nonlocking type 125V and 250V, 15A and 20A receptacles installed _____ shall be listed as tamper-resistant.

"in all areas specified in 210.52 and 550.13" 406.12(1)

The required heating, air-conditioning, and refrigeration equipment receptacle outlet shall be located _____ the equipment.

"on the same level as" 210.63(A)

Where more than one nominal voltage system supplies branch circuits in a building, each _____ conductor of a branch circuit shall be identified by phase or line and system voltage class at all termination, connection, and splice points in compliance with 210.5(C)(1)(a) and (b).

"phase" 210.5(C)(1)

"Underground system service-entrance conductors" are the service conductors between the terminals of the _____ and the point of connection to the service lateral or underground service conductors.

"service equipment" 100 Service-Entrance Conductors, Underground

Where one or more internal cable clamps are present in the box, a single volume allowance for each clamp, in accordance with Table 314.16(B), shall be made based on the largest conductor present in the box.

"False" 314.16(B)(2)

Motors, generators, or other rotating electrical machinery identified for Class I, Division 2 locations can be used in Class I, Division 1 locations.

"False" 501.125(A)(1)

Receptacles mounted in boxes flush with the finished surface or projecting beyond it shall be installed so that the mounting yoke or strap of the receptacle is held rigidly against the _____.

"box or box cover" 406.5(B)

Metal wireways shall be constructed and installed so that _____ continuity of the complete system are assured.

"electrical and mechanical" 376.100(A)

An outlet intended for the direct connection of a lampholder or a luminaire is a(n) "_____."

"lighting outlet" Article 100

Circuit breakers shall _____ all ungrounded conductors of the circuit both manually and automatically unless specifically permitted otherwise.

"open" 240.15(B)

At least one wall switch-controlled lighting outlet shall be installed in every habitable room, kitchen, and bathroom of a dwelling unit.

"True" 210.70(A)(1)

Article _____ covers the use, installation, and construction specifications for armored cable, Type AC.

"Article 320" 320.1 Scope

Where the GFCI protection required for appliances is an integral part of the appliance cord, it shall be installed not more than _____ in. from the attachment plug.

" 12 in." 422.5(B)(4)

A conduit seal shall be required in each conduit run leaving a Class I, Division 2 location. The conduit sealing fitting shall be installed on either side of the boundary within _____ of the boundary.

"10 ft." 501.15(B)(2)

In a Class I, Division 2 location, if flexibility is necessary, _____ are some of the wiring methods that are permitted.

1. flexible metal conduit, liquidtight flexible metal conduit and liquidtight nonmetallic conduit, all with listed fittings 2. interlocked armor Type MC cable with listed fittings 3. listed flexible metal fittings 501.10(B)(2)(1), (2), (3), (4), and (5)

The common point on a wye-connection in a polyphase system is a "neutral point."

Art. 100 Neutral Point

The circuit of a control apparatus or system that carries the electric signals directing the performance of the controller but does not carry the main power current defines a _____.

Control Circuit" Article 100

Electrical and electronic equipment in hazardous (classified) locations shall be protected by a(an) _____ technique.

Explosionproof dust-ignitionproof dusttight 500.7(A), (B), and (C)

_____ on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity.

Paint Lacquer Enamel 250.12

Multimotor and combination-load air-conditioning equipment shall be provided with a visible nameplate marked with the minimum supply circuit conductor ampacity, the maximum rating of the branch-circuit short-circuit and ground-fault protective device.

"True" 440.4(B) Multimotor and combination-load equipment shall be provided with a visible nameplate marked with the maker's name, the rating in volts, frequency and number of phases, minimum supply circuit conductor ampacity, the maximum rating of the branch-circuit short-circuit and ground-fault protective device, and the short-circuit current rating of the motor controllers or industrial control panel.

Enclosures and fittings installed in areas of agricultural buildings where excessive dust may be present shall be designed to minimize the entrance of dust and shall have no openings through which dust can enter the enclosure.

"True" 547.5(C)(1)

The swimming pool structure, including the structural reinforcing steel of the pool shell and deck, except reinforcing steel encapsulated with a nonconductive compound, shall be bonded.

"True" 680.26(B)(3)

Emergency lighting systems shall be designed and installed so that the failure of any individual lighting element, such as the burning out of a lamp, cannot leave in total darkness any space that requires emergency illumination.

"True" 700.16(B)

Conductors installed in nonmetallic raceways run underground shall be permitted to be arranged as _____ installations. The raceways shall be installed in close proximity, and the conductors shall comply with 300.20(B).

"all of these" 300.3(B)(1) Ex

All nonlocking-type, 125V, 15A and 20A receptacles that are controlled by _____, or that incorporate control features that remove power from the receptacle for the purpose of energy management or building automation, shall be permanently marked with the word "controlled."

"an automatic control device" 406.3(E)

Where attachment to an equipment grounding conductor does not exist in the receptacle enclosure, a non-grounding-type receptacle shall be permitted to be replaced with a GFCI-type receptacle; however, some equipment or appliance manufacturers require that the _____ to the equipment or appliance includes an equipment grounding conductor.

"branch circuit" 406.4(D)(2)(c) Informational Note 1

In accordance with Article 690, a _____ is the dc circuit conductors connected to the output of a dc combiner for dc-to-dc converter source circuits.

"dc-to-dc converter output circuit" 690.2

Where single conductor cables comprising each phase, neutral, or grounded conductor of a circuit are connected in parallel in a cable tray, the conductors shall be installed _____, to prevent current imbalance in the paralleled conductors due to inductive reactance.

"in groups consisting of not more than one conductor per phase, neutral, or grounded conductor" 392.20(C)

Receptacles rated other than 125V, single-phase, 15A, 20A, and 30A for temporary installations shall be protected by _____.

"GFCI protection for personnel" 590.6(B), (B)(1)

Overcurrent protection for conductors and equipment is provided to _____ the circuit if the current reaches a value that will cause an excessive or dangerous temperature in conductors or conductor insulation.

"open" 240.1 Informational Note

Appliances such as _____ rated 150V or less to ground and 60A or less, single- or three-phase, shall be provided with Class A GFCI protection for personnel.

Tire Inflation Machine Vending Machines Sump pumps 422.5(A)(4), (5), and (6)