NEC 2017 Questions from 2B

The minimum size for most overhead service conductors is ___.

8 AWG copper, or 6 AWG aluminum. 230.23(B)

Overhead feeder conductors installed over roofs shall have a vertical clearance of ___ above the roof surface, unless permitted by an exception.

8 ft. 6 in. 225.19(A)

Article 210 provides general requirements for ___.

Branch circuits. 210.1

When a feeder supplies ___ in which equipment grounding conductors are required, the feeder shall include or provide an equipment grounding conductor.

Branch circuits. 215.6

Underground raceways entering a ___ from an outside distribution system shall be sealed at either or both ends to prevent moisture from contacting energized live parts.

Building or structure. 225.227

Individual meter socket enclosures ___ service equipment. A: are not considered B: need to be marked as suitable for C: All of the above. D: None of the above.

C. All of the above. 230.66

Where a premises wiring system contains feeders supplied from more than one nominal voltage system, each ungrounded conductor of a feeder shall be identified by phase or line and system by ___, or other approved means.

Color coding, marking tape, or tagging. 215.12 (C)(1)(A)

Luminaires can be installed in a commercial cooking hood if the luminaire is identified for use within a ___ cooking hood.

Commercial. 410.10(C)(1)

In a dwelling unit, at least one lighting outlet ___ shall be located at the point of entry to the attic, underfloor space, utility room or basement where these spaces are used for storage or contain equipment requiring servicing.

Containing a switch or controlled by a wall switch. 210.70(A)(3)

Service-drop conductors shall have ___. A: sufficient ampacity to carry the load B: adequate mechanical strength C: A or B. D: A and B.

D: A and B. 230.23(A)

Service-entrance conductors can be spliced or tapped by clamped or bolted connections at any time as long as ___. A: the free ends of conductors are covered with an insulation that is equivalent to that of the conductors or with an insulating device identified for the purpose B: wire connectors or other splicing means installed on conductors that are buried in the earth are listed for direct burial C: no splice is made in a raceway D: All of the above.

D: All of the above. 230.46 *verify

In a multiple-occupancy building, each occupant shall have access to his or her own ___.

Disconnecting means. 225.35

A 15 A or 20 A, 125 V receptacle outlet shall be located within 25 ft. of heating, air conditioning and refrigeration equipment for ___ occupancies.

Dwelling, commercial and industrial. 210.63

T/F - Where fuses are used as the service overcurrent device, the disconnecting means shall be located ahead of the load side of the fuses in accordance with 230.91.

False.

Replacement luminaires aren't required to be connected to an equipment grounding conductor if no equipment grounding conductor exists at the outlet box and the luminaire is ___.

GFCI protected. 410.44 Ex. 3

The two to six disconnects for a disconnecting means for a building supplied by a feeder shall be ___.

Grouped. 225.34(A)

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)

In rooms other than kitchens and bathrooms of dwelling units, one or more receptacle controlled by a wall switch shall be permitted in lieu of ___.

Lighting outlets. 210.70(A)(1) Ex. 1

In dwelling units, the voltage between conductors that supply the terminals of ___ shall not exceed 120 V, nominal.

Luminaires and Cord and Plug connected loads of 1,440 VA or less. 210.6(A)(1) and (2)

A building or structure shall be supplied by a maximum of ___ feeder(s) or branch circuits(s), unless specifically permitted otherwise.

One. 225.30

The disconnecting means for a building supplied by a feeder shall plainly indicate whether it is in the ___ position.

Open or closed. 225.38(D)

On a three-phase, 4-wire, delta-connected service where the midpoint of one phase winding is grounded, the service conductor having the higher phase voltage-to-ground shall be durably and permanently marked by an outer finish that is ___ in color, or by other effective means, at each termination or junction point.

Orange. *reference?

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

Overhead conductor spans. 225.26

All 15 A and 20 A, 125 V, single phase receptacles located outdoors of dwelling units, including receptacles installed under the eaves of roofs, shall be GFCI protected except for a receptacle that is supplied by a branch circuit dedicated to ___ if the receptacle is not readily accessible and the equipment or receptacle has ground fault protection of equipment (GFPE) [426.28 or 427.22]

Pipeline and vessel heating equipment.

In other than dwelling units, all single phase receptacles rated 150 volts to ground or less, 50 A or less and three phase receptacles rated 150 volts to ground or less, 100 A or less installed in ___ shall have GFCI protection for personnel.

Rooftops, kitchens, and bathrooms. 210.8(B)(1-3)

A luminaire marked "Suitable for Wet Locations" ___ be permitted to be used in a damp location.

Shall. 410.10(A)

For the application of GFCI protection for personnel, when determining distance from receptacles for sinks [210.8(A)(7) and 210.8(B)(5)] and bathtubs or shower stalls [210.8(A)(9)], the distance shall be measured as the ___ path the cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier, or passing through a door, doorway, or window.

Shortest.

There shall be no more than ___ switches or circuit breakers to serve as the disconnecting means for a building supplied by a feeder.

Six. 225.33(A)

Multi-wire branch circuits shall ___.

Supply online line to neutral loads. 210.4(C)

Ground-fault protection of equipment shall not be required at a feeder disconnect if ground-fault protection of equipment is provided on the ___ side of the feeder and the load side of any transformer supplying the feeder.

Supply. 215.10 Ex. 2

The requirements for maintaining a 3-foot vertical clearance from the edge of the roof shall not apply to the final feeder conductor span where the conductors are attached to ___.

The side of a building. 225.19(A) Ex. 4

T/F - Conductors located on the line or supply side of the service point are covered by the NEC.

True. *reference?

T/F - Fittings for use with service masts shall be identified for the use.

True. *reference?

T/F - Occupancies which utilize a fire pump for life safety protection are permitted to have a separate service provided solely for the fire pump.

True. 230.2(A)(1)

T/F - Overhead service conductors are required to be insulated or covered.

True. 230.41

T/F - As a general rule, only service conductors shall be installed in service raceways.

True. 230.7

For a panelboard to be suitable for use as service equipment, not more than six main disconnecting means may be provided.

True. 230.71(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 at all termination, connection, and splice points in compliance with 210.5(C)(1)(a) and (b).

Ungrounded.

Each multi-wire branch circuit shall be provided with a means that will simultaneously disconnect all ___ conductors at the point where the branch circuit originates.

Ungrounded. 210.4(B)

Surface-mounted switches or circuit breakers in a damp or wet location shall be enclosed in a ___ enclosure or cabinet that complies with 312.2.

Weatherproof. 404.4(A)

Receptacles installed outdoors, in a location protected from the weather or other damp locations, shall be in an enclosure that is ___ when the receptacle is covered.

Weatherproof. 406.9(A)

Raceways on exterior surfaces of buildings or other structures shall be arranged to drain, and be listed and approved for use in ___ locations.

Wet. 225.22

Ground-fault protection of equipment shall be required for a feeder disconnect if the disconnect is rated ___.

1,000 A, 480 V. 215.10

Feeder neutral conductors shall be permitted to be sized at ___ percent of the continuous and noncontinuous load.

100%. 215.2(A) Ex. 1 and 2.

When connected to a branch circuit supplying two or more 15 A receptacles, each receptacle shall not supply a total cord and plug connected load in excess of ___.

12 A. 210.21(B)(2) + table

Underground service conductors that supply power to limited loads of a single branch circuit shall not be smaller than ___.

12 AWG copper. 230.32(B) Ex. (?)

As a general rule, the service disconnecting means is required to have a rating that is ___ the load to be carried.

125% of. 230.79

A building disconnecting means that supplies only limited loads of a single branch circuit shall have a rating of not less than ___.

15 A. 225.39(A)

The minimum clearance for overhead feeder conductors that pass over track rails of railroads is ___.

24 ft. 6 in. 225.18(5)

Where it is impractical to mount service heads above the point of attachment, the service head or gooseneck shall be permitted to be located not more than ___" from the point of attachment, of the overhead service conductors.

24". 230.54(C) Ex. (?)

Overhead feeder conductors to a building shall have a vertical clearance of final spans above, or withing ___ measured horizontally from platforms, projections, or surfaces from which they might be reached.

3 ft. 225.19(D)(2)

In dwelling unit bathrooms, not less than one 15 A or 20 A, 125 V receptacle outlet shall be installed within ___ ft. of the outside edge of each bathroom basin.

3 ft. 210.52(B)?

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

6 ft. 210.50(C)

When applying the general provisions for receptacle spacing to the rooms of a dwelling unit which require receptacles in the wall space, no point measured horizontally along the floor line of any wall space may be more than ___ from an outlet.

6 ft. 210.52(A)(1)

Receptacles incorporating an isolated grounding conductor connection intended for the reduction of electrical noise shall be identified by ___ on the face of the receptacle.

An orange triangle. 406.3(D)

T/F - Service disconnecting means are permitted to be installed in bathrooms.

False. 230.70(A)(2)

T/F - In dwelling units, outdoor receptacles can be connected to one of the 20A small appliance branch circuits.

False. 210.52(B)(2)

When the disconnecting means for a building supplied by a feeder is a power-operable switch or circuit breaker, it shall be able to be opened by hand in the event of a ___.

Power failure. 225.38(A)

T/F - In a dwelling unit, illumination from a lighting outlet shall be provided on the exterior side of each outdoor entrance or exit that has grade level access.

True. 210.70(A)(2)(3)

Open individual conductors shall not be smaller than ___ AWG copper for spans up to 50 ft. in length and ___ AWG copper for a longer span, unless supported by a messenger wire.

10 AWG and 8 AWG. 225.6(A)(1)

The point of attachment of overhead premises wiring to a building shall in no case be less than ___ above finished grade.

10 ft. 225.18(1) or 225.16(A)?

The minimum clearance for overhead feeder conductors not exceeding 1,000 V that pass over commercial areas subject to truck traffic is ___.

12 ft. 225.18(4)

Overhead feeder conductors shall have a minimum ____feet vertical clearance over residential property and driveways, as well as those commercial areas not subject to truck traffic, where the voltage is limited to 300 volts-to-ground.

12 ft. 225.18(2)

If a set of 120/240 V overhead feeder conductors terminates at a through-the-roof raceway or approved support, with less than 6 ft. of these conductors passing over the roof overhand, the minimum clearance above the roof for these conductors is ___.

18 in. 225.19(A) Ex. 3

Receptacles rated ___ or less directly connected to aluminum conductors shall be listed and marked CO/ALR.

20 A. 406.3(C)

Handholes in poles supporting luminaires shall not be required for poles ___ ft or less in height above finished grade, if the pole is provided with a hinged base.

20. 410.30(B)(1) Ex. 2

A receptacle outlet shall be installed at each dwelling unit kitchen wall counter-top and work surface space that is 12 in. or wider and receptacle outlets shall be installed so that no point along the wall line is more than __ in., measured horizontally from a receptacle outlet in that space.

24 in. 210.52(C)(1)

At least one 125 V, single phase, 15 A or 20 A rated receptacle outlet shall be installed in an accessible location within ___ ft. of the indoor electrical service equipment and be located within the same room or area as the service equipment.

25 ft. 210.64

For installations consisting of not more than two 2-wire branch circuits, the building disconnecting means shall have a rating of not less than ___.

30 A. 225.39

SE cable shall be supported at intervals not exceeding ___" and within ___" of every service head, gooseneck or point of connection to a raceway or enclosure.

30" and 12". 230.51(A)

Underground service conductors shall be protected from damage in accordance with ___ including minimum cover requirements.

300.5 Reference: 230.32 *verify

AC or DC general-use snap switches may be used for control of inductive loads not exceeding ____of the ampere rating of the switch at the applied voltage.

50%. 404.14(B)(2)

In clothes closets, recessed incandescent or LED luminaires with a completely enclosed light source can be installed in the wall or the ceiling, provided there is a minimum clearance of ___ in. between the luminaire and the nearest point of a storage space.

6. 410.16(C)(3)

At least one receptacle outlet not more than ___ above a balcony, deck, or porch shall be installed at each balcony, deck, or porch that is attached to and accessible from a dwelling unit.

6.5 ft. 210.52(E)(3)

A receptacle is considered to be in a location protected from the weather when located under roofed open porches, canopies, marquees, and the like, where it will not be subjected to ___.

Beating rain or water Runoff. 406.9(A)

Alternating-current general-use snap switches are permitted to control ___. A: resistive and inductive loads that do not exceed the ampere and voltage rating of the switch B: tungsten-filament lamp loads that do not exceed the ampere rating of the switch at 120 V C: motor loads that do not exceed 80% of the ampere and voltage rating of the switch D: All of the above.

D: All of the above. 404.14(A)(1-3)

Where documented safe switching procedures are established and maintained and the installation is monitored by ___ individuals, the disconnecting means for a building supplied by a feeder can be located elsewhere on the premises.

Qualified. 225.32 Ex. 1

The GFCI protection required by 210.8(A), (B), (C), (D), and (E) shall be ___. Circuit breaker type only, accessible, readily accessible, or concealed?

Readily accessible.

The disconnecting means for a building supplied by a feeder shall be installed at a(n) ___ location.

Readily accessible. 225.32 Ex. 1

The service disconnecting means shall consist of not more than ___ switches or circuit breakers.

Six. 230.71(A)

In dwelling units, when determining the spacing of receptacle outlets, ___ on exterior walls shall not be considered wall space.

Sliding panels. *Fixed panels count. 210.52(A)(2)(2)

Additional services shall be permitted for a single building or other structure sufficiently large to make two or more services necessary if permitted by ___.

Special permission. 225.30(B)(2)

T/F - A minimum service disconnect rating of 30 A is required for service loads that consist of not more than two branch circuits.

True. 230.79(B)

Receptacles mounted in boxes set back from the wall surface shall be installed so that the mounting ___ of the receptacle is held rigidly at the finished surface.

Yoke or strap. 406.5(A)

The minimum feeder conductor ampacity must be no less than the noncontinuous load plus ___ percent of the continuous load, and not less than the maximum load after the application of adjustment and correction factors.

125%. 215.2 (A)(1)

Luminaires must maintain a minimum clearance from the closet storage space of ___. A: 12 in. for surface-mounted incandescent or LED luminaires with a completely enclosed light source B: 6 in. for surface-mounted fluorescent luminaires C: 6 in. for recessed fluorescent luminaires or recessed incandescent or LED luminaires with a completely enclosed light source D: All of the above.

D: All of the above. 410.16(C)(1-4)

T/F - A 100 A service is the minimum rating required for any one-family dwelling.

True. 230.79(C)

T/F - Service conductors are provided overcurrent protection by the overcurrent protection devices that have a rating or setting not higher than the allowable ampacity of the conductor.

True. 230.90(A)

T/F - Switches shall not be installed within tubs or shower spaces unless installed as part of a listed tub or shower assembly.

True. 404.4(C)

T/F - A receptacle shall not be installed within, or directly over, a bathtub or shower space.

True. 406.9(C)

T/F - When connected to multiwire branch circuits, the fluorescent luminaire disconnect must simultaneously break all circuit conductors of the ballast, including the grounded conductor.

True. 410.130(G)(2)

T/F - Lampholders of the screw-shell type shall be installed for use as lampholders only.

True. 410.90

T/F - A single receptacle installed on an individual branch circuit shall have an ampere rating not less than that of the branch circuit.

True. 210.2(B)(1)

T/F - Where a lighting outlet(s) is installed for interior stairways, there shall be a wall switch at each floor level and each landing level that includes an entryway where the stairway between floor levels has six risers or more unless remote, central, or automatic control is used.

True. 210.70(A)(2)(3)

T/F - GFCI protection shall be provided for all 15A and 20A, 125V, single phase receptacles in dwelling unit unfinished portions or areas of basements not intended as habitable rooms.

True. 210.8(A)(5)

T/F - Where a mast is used for overhead branch-circuit or feeder conductor support, it shall be of adequate strength or be supported by braces or guy wire to withstand the strain imposed by the conductors.

True. 225.17(A)

T/F - Outside wiring shall not be installed beneath openings through which materials may be moved, and shall not be installed where they will obstruct entrance to these buildings' openings.

True. 225.19(D)(3)

Poles over 20 ft in height above grade, without a hinged base, that support luminaires shall ___. A: have an accessible handhole (sized 2 x 4 in.) with a cover suitable for use in wet locations B: have an equipment grounding terminal that is accessible from the handhole C: A and B. D None of these.

C: A and B. 410.30(B)(1) *&3A?

A snap switch that does not have means for connection to an equipment grounding conductor shall be permitted for replacement purposes only where the wiring method does not include an equipment grounding conductor and the switch is ___. A: provided with a faceplate of nonconducting, noncombustible material with nonmetallic screws B: GFCI protected C: A or B. D: None of these.

C: A or B. 404.9(B) Ex. 1

Snap switches are considered to be part of the effective ground-fault current path when ___. A: the switch is connected to the intersystem bonding termination B: the switch is mounted with metal screws to a metal box or a metal cover that's connected to an equipment grounding conductor C: an equipment grounding conductor or equipment grounding termination of the snap switch D: B or C.

D: B or C. 404.9(B)(1 & 2)