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2017 NEC Update Part 1RV 2.14.18

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Quiz 11. NEC chapters 5 through 7 cover _______. general occupancies special equipment utilities all of the answers provided

2. The NEC governs all things electrical, including electrical utility storage equipment.

True False

3. If equipment is listed, it ______ for use in every installation.

is permitted is not permitted without approval is suitable may not be suitable

4. NEC accessibility requirements allow for ______ to gain access to electrical equipment.

crawling under obstacles climbing ladders using keys using tools

5. If a building is larger than the building code allows, ______.

it must be torn down it can be divided by fire walls it must be constructed from brick it cannot contain any electrical equipment

6. A cable routing assembly may contain ______.

only optical fiber cables power-limited fire alarm cables uninsulated conductors all of the answers provided

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7. Computers, routers, servers and ______ are becoming essential to the transmission of audio, video and data.

their powering equipment DVD players their shipping containers stereos

8. A communications raceway may contain ______.

any type of cable optical fiber cables anything related to communications only copper conductors

9. A cord connector designated for hazardous locations must include ______.

an explosion-proof seal a flameproof seal either of the answers provided none of the answers provided

10. Dusttight enclosures are designed to prevent dust from entering ______.

except under extreme conditions under specified conditions in outdoor environments in hazardous environments

11. The NEC’s definition of electric signs does not include those that are ______.

illuminated portable non-illuminated none of the answers provided

12. A Field Evaluation Body (FEB) performs field evaluations of ______.

electrical equipment wire coating hazardous locations inspector compliance

13. Equipment that has been labeled by a Field Evaluation Body indicating that it was found to comply with requirements is called ______.

suitable non-hazardous dusttight field labeled

14. A photovoltaic system converts solar energy into electrical energy ______.

that is useless for any practical applications

with the use of the wind for connection to a utilization load only for self-contained systems

15. A process seal for hazardous locations is a seal between electrical systems and ______.

the surrounding air flammable or combustible fluids flood water none of the answers provided

16. A raceway may be nonmetallic. True False

17. A receptacle is a ______ installed at the outlet for the connection of an attachment plug.

surge protector bare conductor termination watertight seal contact device

18. The NEC’s definition of a structure includes ______.

a free-standing switchboard a light pole an electric sign none of the answers provided

19. A ______ is an assemblage of equipment through which electric energy is passed for the purpose of distribution.

photovoltaic cell fuse substation conductor

Quiz 21. Product testing, evaluation and listing may

be performed by ______. recognized qualified electrical testing

laboratories an inspector in the field any licensed electrician all of the answers provided

2. The NEC has specified that all conductors are to be ______ or ______ unless otherwise specified.

sealed, protected copper, aluminum glued, stapled titanium, steel

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3. Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage ______ the current that is available at the line terminals of the equipment.

greater than less than at least equal to suitable for

4. Equipment identified ______, such as “dry locations,” “indoor use only” or “damp locations” shall be protected against damage from the weather during construction.

only for outdoor use as refurbished with a field label only for indoor use

5. The 2017 NEC ______ the use of a calibrated torque tool to achieve the indicated torque when installing electrical equipment.

requires prefers recommends does not allow

6. The NEC requires that arc-flash hazard warning labels contain ______.

a picture of a lightning bolt a bright yellow background the date the label was applied the initials of the person who applied the

label

7. The NEC does not require service equipment labeling if an arc-flash label is applied in accordance with acceptable industry practice.

True False

8. The marking requirement for reconditioned equipment states that the label must contain ______.

the current owner’s company name an orange background the date of the reconditioning the date of original manufacture

9. The NEC does not require reconditioned equipment to be labeled when ______.

there’s no good place to put a label the equipment is only accessible by qualified

service persons it’s obvious that the equipment is not new the equipment is located where no one

would likely see the label anyway

10. Field-applied hazard markings must warn of ______ using effective words, colors, symbols or any combination of the three.

ambient air temperature water proximity conductor size hazards

11. The calculation of the available fault current of an electrical system ______.

must be made available to authorized inspectors

can only be done for residential installations should not be stored with other

documentation all of the answers provided

12. Where equipment operating at 1000 volts or less to ground that requires servicing while energized is installed above a lay-in ceiling, the accessible opening must be ______.

smaller than 22 inches by 22 inches at least 30 inches by 30 inches no less than 22 inches by 22 inches large enough to fit two electricians working

side by side

13. Equipment operating at 500 volts or less to ground that requires adjustment while energized is installed in a crawl space with limited access. The accessible opening must be ______.

at least 22 inches by 22 inches approved for equipment servicing no further than 6 feet from an exit no less than 22 inches by 30 inches

14. In enclosures with exposed live parts, ______ must be separated from high-voltage equipment by a suitable partition, fence or screen.

residential spaces low-voltage equipment communications raceways water pipes

15. Illumination for working spaces around service equipment ______.

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can be automatic as long as there is also a manual override

should not use LED bulbs must be at least 12 inches from the service

equipment must turn on automatically

16. Roof extensions are not permitted in the working clearance space around electrical equipment.

True False

17. Outdoor electrical equipment shall be installed in ______.

metallic boxes requiring key access locked buildings enclosures rated for hazardous locations identified enclosures

18. Live parts of electrical equipment operating at ______ shall be guarded against accidental contact by approved enclosures or elevation above the floor.

standard temperature high altitudes 50 to 1000 volts nominal maximum capacity

19. A complete electrical system design shall be made available to the AHJ and shall be tested when ______.

first installed on site the AHJ is available to watch the AHJ is not available to watch the installation is 50% complete

Quiz 31. NEC Article 210 provides general

requirements for ______. enclosure fill calculations conduit and tubing sizing wiring methods branch circuits

2. The 2017 NEC conductor grouping requirements for multi-wire branch circuits mandate that all ungrounded and neutral

circuit conductors must ______ in every enclosure.

not be grouped together be grouped together be at least 10 AWG not touch each other

3. In an installation with an existing voltage system where a new voltage system is being added, it is permissible to ______.

not mark the new system when it’s easy to tell them apart

mark only the old system as “OLD SYSTEM” mark the new system with a ball-point pen mark only the new system voltage

4. For branch circuits supplied from DC systems, the NEC permits size ______ conductors to be marked at termination, connection and splice points, rather than along the entire length of the conductor.

2 AWG 4 AWG 8 AWG none of the answers provided

5. When determining the distance from a receptacle to a bathtub, measure the shortest path an appliance cord connected to the receptacle would follow, even for receptacles located outside the bathroom doorway.

True False

6. GFCI protection in unfinished portions of dwelling unit basements ______.

must be installed must not be installed must be installed only if someone

occasionally sleeps in the unfinished basement

must not be installed if the area is used for food storage

7. To determine if a GFCI receptacle is required near a sink in a dwelling unit bathroom, measure from the receptacle location to ______.

the outside edge of the sink the top inside edge of the sink bowl the center of the sink drain none of the answers provided

8. In commercial building crawl spaces, ______ must have GFCI protection.

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single-phase receptacles rated 150 volts to ground

three-phase receptacles rated 250 volts to ground

both of the answers provided above none of the answers provided

9. Lighting outlets in crawl spaces are required to be GFCI protected ______.

in any building where the crawl space is less than 3 feet tall

only in residential buildings only in non-dwelling units in both residential and commercial buildings

10. At least one 120-volt, 20-amp dedicated branch circuit shall be installed to supply receptacle outlets in ______.

detached garages with electrical power detached garages without electrical power detached garages with only one stall none of the answers provided

11. 120V, single-phase, 15A and 20A branch circuits supplying outlets and devices installed in ______ of hotels shall be AFCI protected.

medicine cabinets conference rooms guest rooms workout rooms

12. When calculating wall space for receptacle installation, it is not necessary to include ______.

spaces less than 2 feet wide spaces with countertops space measured around corners none of the answers provided

13. A receptacle outlet to serve a specific appliance ______ to be supplied from an individual branch circuit rated 15 amps or greater.

may not be permitted is never allowed shall be required shall be permitted

14. A peninsular countertop measuring ______ does not require a receptacle outlet.

20 inches wide by 24 inches long 12 inches wide by 30 inches long 12 inches wide by 20 inches long

14 inches wide by 22 inches long

15. In an attached garage, at least one receptacle outlet must be installed ______. (choose the best answer)

in each vehicle bay higher than 5-1/2 feet above the floor both of the answers provided neither of the answers provided

16. A receptacle outlet must be installed within 25 feet of indoor service equipment.

True False

17. Where the service voltage is greater than 120 volts to ground, a receptacle outlet is not required for services dedicated to ______.

solar cells pond filtration pumps industrial washing machines none of the answers provided

18. When installing dimmer switches for dwelling unit stairwell lighting, ______.

three-way switches must be used four-way switches must be used dimmer switches must be installed at each

switch location only dial-type dimmer switches may be used

19. In utility rooms containing equipment requiring servicing, ______ containing a switch or controlled by a wall switch shall be installed.

at least one lighting outlet at least one receptacle outlet at least one panelboard all of the answers provided20. When determining the required number of

receptacle outlets for a non-dwelling meeting room, ______ must be considered.

the number of computers likely to be used in the room at one time

the number of overhead lights the minimum size of the room with the

partitions in place none of the answers provided

Quiz 41. If the OCPD protecting the feeder in an

assembly is listed for operation at 100% of its rating, the allowable ampacity of the minimum-sized feeder conductors must be

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at least the sum of the noncontinuous load plus ______ of the continuous load.

80% 90% 100% 125%

2. Where a portion of a feeder is connected at both its supply and load ends to separately installed pressure connections, the allowable ampacity must be at least ______.

125% of the noncontinuous load 125% of the continuous load the sum of the continuous load plus the

noncontinuous load the sum of 125% of the continuous load plus

the noncontinuous load

3. Grounded conductors that are ______ are permitted to be sized at 100% of the continuous and noncontinuous load.

at least size 10 AWG not connected to an overcurrent device connected to an overcurrent protection

device installed in flexible metal conduit

4. The 2017 NEC Article 220 provides requirements for calculating ______.

branch-circuit size feeder installation enclosure fill service loads

5. Table 220.12 General Lighting Loads by Occupancy provides a value of ______ for schools.

2 VA per sq. ft. 3 VA per sq. ft. 3.5 VA per sq. ft. 1.2 VA per sq. ft.

6. Using NEC Article 220.12 Exception No. 2 and Table 220.12 for a 75,000-sq. ft. bank building with a continuous lighting load, the minimum lighting load is ______.

328,125 VA 187,500 VA 234,375 VA 262,500 VA

7. Using NEC Article 220.12 Exception No. 2 and Table 220.12 for a 125,000-sq. ft. office building with a continuous lighting load, the minimum lighting load is ______.

234,375 VA 328,125 VA 546,875 VA 390,625 VA

8. The minimum unit lighting load for a grocery store is ______.

3-1/2 VA per square foot 2 VA per square foot 3 VA per square foot 1 VA per square foot

9. When determining existing service loads, the calculation can be based on load data measured for 30 days in the event that maximum demand data for ______ is not available.

adjacent buildings existing refurbished equipment a 2-year period a 1-year period

10. A mast supporting overhead feeder conductors must have adequate strength to safely withstand the strain imposed by the overhead conductors or it must be supported by ______.

extra couplings a wide metal base braces or guys none of the answers provided

11. Overhead spans of open multiconductor cables over rooftops must have vertical clearance of ______.

no more than 8 feet 6 inches no more than 8 feet no less than 8 feet no less than 8 feet 6 inches

12. Raceways on building exteriors are required to be ______.

arranged to drain approved by the AHJ listed for use in hazardous locations all of the answers provided

13. Raceway sealants must be ______. listed for the purpose identified for use with the components

present explosion-proof

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approved for use in hazardous locations

14. Electric vehicle charging stations may be listed, labeled and identified for more than one feeder or branch circuit.

True False

15. Service raceways are permitted to contain ______.

feeder conductors branch-circuit conductors overcurrent protection devices service conductors

16. The 2017 NEC allows trees to be used to support ______.

overhead service conductors electrical service equipment both of the answers provided none of the answers provided

17. Overhead service conductors ______. may not pass over railroad tracks must clear railroad tracks by at least 20 feet must clear railroad tracks by at least 24-1/2

feet must cross railroad tracks underground

18. Metal support structures supporting overhead service conductors passing over a roof must be bonded to ______.

the grounded overhead service conductor the side of the building an additional metal structure that touches

the ground the rooftop

19. For an installation with a 200A, 3-phase, continuous load with 3 current-carrying copper conductors with insulation rated at 75C, what size service-entrance conductors are required?

4/0 AWG 250 AWG 300 AWG 350 AWG

20. For an installation with a 240A, 3-phase, continuous load with 3 current-carrying copper conductors with insulation rated at 75C, what size service-entrance conductors are required?

250 AWG 300 AWG 350 AWG 400 AWG

21. Cables permitted for use in cable trays ______.

must be listed for use in cable trays must be field labeled with “CT” must be marked by the manufacturer with

“CT” all of the answers provided

22. Raceways enclosing service-entrance conductors must be listed or approved as rainproof.

True False

23. The 2017 NEC requires that service heads on service-entrance cables are located ______ the service drop.

below the point of attachment of above the point of attachment of above the roofline of within a gooseneck at

24. A meter socket does not need to be listed when ______.

it is rated for the voltage and ampacity of the service

it’s an individual meter socket it is going to be field labeled it’s under the exclusive control of an electric

utility

25. The NEC does not allow ______ to be connected to the supply side of a service disconnect.

solar PV systems batteries HVAC equipment wind electric systems

26. Where fuses are used as the service overcurrent device, the ______ shall be located ahead of the supply side of the fuses.

meter socket disconnecting means attach point raceway

Quiz 5

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1. According to Table 240.6(A), ______ is a standard ampere rating for a fuse.

45 55 65 75

2. If we calculate the minimum ampere rating for a fuse of 180 amps, what standard ampere rating fuse should we select?

175 amps 200 amps 210 amps 300 amps

3. If a tool is required to open an industrial control panel, it is considered to be ______.

not readily accessible not suitable for use readily accessible suitable for use with AHJ approval

4. If a 1500 A fuse has a clearing time of .08 seconds at the available arcing current, ______.

the NEC does not permit its use another method of arc energy reduction

must be provided the AHJ must approve it for use in that

installation differential relaying must be used

5. If arcing currents exceed the instantaneous trip level, the circuit breaker will trip ______.

in the maximum possible time before a fire can start when the arc energy increases in the minimum possible time

6. NFPA 780-2014, Standard for the Installation of Lightning Protection Systems provides information on installation of grounding and bonding for lightning protection systems.

True False

7. In order to stop objectionable current, the NEC permits ______ alteration(s).

installer-tested multiple only one objectionable

8. Class 2 load-side circuits for suspended ceiling low-voltage power grid distribution systems shall not be______.

readily accessible installed below a height of 6-1/2 feet from

the floor grounded none of the answers provided

9. The grounded conductor in a single raceway or cable shall not be ______ specified in Table 250.102(C)(1).

larger than smaller than of any type insulated, as

10. If a building is supplied by a feeder from an outdoor separately derived system, a system bonding jumper at both the source and the first disconnecting means shall be permitted.

Yes, if the AHJ approves it. No, this is never permitted. Yes, if it does not establish a parallel path

for the grounded conductor. Yes, but only if the separately derived

system is a transformer.

11. The ______ must be used as the grounding electrode for a separately derived alternating-current system.

building or structure grounding electrode system

closest water pipe largest metal structural element all of the answers provided

12. The common grounding electrode conductor for a separately derived alternating-current system is permitted to be ______.

any metal pipe any PVC pipe a metal water pipe a metal gas pipe

13. A metal in-ground support structure in direct contact with the earth ______, with or without concrete encasement is permitted to be used as a grounding electrode.

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horizontally for at least 20 feet vertically for at least 10 feet vertically for no more than 10 feet over an area of at least 10 square feet

14. ______ are permitted to be used as grounding electrodes.

Swimming pools Aluminum structures, provided they’re

underground, Metal gas pipes none of the answers provided

15. A ground ring must be installed at least ______ below the surface of the earth.

30 inches 42 inches 36 inches 48 inches

16. Bonding together of all separate grounding electrodes will limit ______ differences between them and between their associated wiring systems.

ampacity material voltage all of the answers provided

17. A 6 AWG or larger copper or aluminum grounding electrode conductor not exposed to ______ shall be permitted to be run along the surface of the building construction without metal covering or protection.

moisture excessive heat rain physical damage

18. A 6 AWG or larger copper or aluminum grounding electrode conductor exposed to possible physical damage must be protected in ______.

RMC cable armor PVC any of the answers provided

19. Grounding electrode conductors in contact with the earth shall be buried or otherwise protected ______.

if subject to physical damage unless subject to physical damage if subject to flooding unless larger than 6 AWG

20. Bonding jumpers from grounding electrodes are permitted to be connected to an aluminum or copper busbar ______ and of sufficient length to accommodate the number of terminations necessary for the installation.

at least 3/8-inch-thick by 2 inches wide at least 1∕4-inch-thick by 2 inches wide no larger than 1/4-inch-thick by 2 inches

wide none of the answers provided

21. If a grounding electrode conductor is connected to a single concrete-encased electrode and does not extend to any other electrode requiring a larger size conductor, the grounding electrode conductor does not need to be larger than ______ copper wire.

8 AWG 6 AWG 4 AWG 2 AWG

22. If a bonding jumper is connected to a 6 AWG copper ground ring and extends to another electrode requiring a 4 AWG conductor, the bonding jumper does not need to be larger than ______.

4 AWG the size specified by the AHJ the size specified by Table 250.66 6 AWG

23. A grounding electrode conductor is permitted to extend the connection to an electrode by being connected to interior metal water pipe that is electrically continuous with a metal underground water pipe electrode and located not more than 5 feet from the point of entrance to the building.

True False

24. ______ securing the structural steel column that are connected to a concrete-encased electrode that complies with 250.52(A)(3) and is located in the support footing or foundation shall be permitted to connect the metal structural frame of a building or

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structure to the concrete encased grounding electrode.

Concrete structures Hold-down bolts Metal rivets all of the answers provided

25. A rebar-type concrete-encased electrode with an additional rebar section extended from its location within the concrete to an accessible location ______ shall be permitted for connection of grounding electrode conductors and bonding jumpers.

at least 18 inches above the earth along the building structure that is not subject to corrosion within 5 feet of the point of entry to the

structure

Quiz 61. A metal elbow installed in a run of

underground ______ and buried beneath 22 inches of earth shall not be required to be connected to the grounded system conductor, supply side bonding jumper, or grounding electrode conductor.

nonmetallic raceway metallic raceway concrete gravel

2. Metal components that are part of an installation of nonmetallic raceway and are isolated from possible contact to any part of the metal components by being encased in at least 2 inches of concrete ______.

are required to be bonded to the equipment grounding conductor

should be bonded to the supply-side bonding jumper

do not have to be bonded to the equipment grounding conductor or supply-side bonding jumper

need to be re-installed in a properly grounded metallic raceway

3. An intersystem bonding termination (IBT) for connecting intersystem bonding ______ shall be provided external to enclosures at the service equipment or metering equipment enclosure.

busbars conductors raceways tubes

4. The 2017 NEC requirements for bonding for communication systems permits an installer to ______.

install a nonmetallic busbar in a lighted chicken coop

not install an intersystem bonding conductor (IBT) in a lighted chicken coop

both of the answers provided neither of the answers provided

5. Bonding jumpers may be made of ______. copper-clad aluminum porcelain any insulating material any non-flammable material

6. A metal sprinkler system installed in a building may be bonded to a grounding electrode conductor.

No, this is never permitted. Yes, if the conductor is of sufficient size. No, this is not permitted inside a building. Yes, but only if the grounding electrode

conductor is copper.

7. If a bonding jumper is of sufficient size, a metal piping system installed in a building that is likely to become energized may be bonded to ______.

an ungrounded busbar any metallic raceway any nonmetallic raceway a grounding electrode

8. A building with ______ not intentionally grounded and likely to become energized may be bonded to a service equipment enclosure.

concrete footings a metal piped sprinkler system an exposed metal frame any of the answers provided

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9. An equipment grounding conductor run enclosing the circuit conductors may include flexible metal conduit that is ______.

larger than 1-1/4 inches not listed smaller than 1-1/4 inches made of rubber

10. The sizing of a wire-type EGC is determined by the ______ for the feeder or branch circuit.

size of the conduit the installer plans to use proposed location type of conduit the installer plans to use size of the overcurrent protection device

11. If multiconductor cables are installed in parallel in the same auxiliary gutter, a single equipment grounding conductor that is sized in accordance with 250.122 shall be permitted ______ the equipment grounding conductors provided within the multiconductor cables and shall all be connected together.

in combination with in lieu of to be removed from to be undersized because of

12. If the overcurrent protection device (OCPD) in the circuit ahead of the equipment is rated at 80 A, what is the minimum size grounding conductor we can install?

10 AWG copper 8 AWG copper 8 AWG aluminum 4 AWG aluminum

13. If the setting of an overcurrent protection device (OCPD) in the circuit ahead of the equipment is 204 amperes, we are permitted to install a ______ copper grounding conductor.

4 AWG 6 AWG 8 AWG 10 AWG

14. If circuit conductors are terminated on equipment______, all equipment grounding conductors associated with any of those circuit conductors shall be connected within the box.

aboveground adjacent to a box within a box underground

15. The neutral conductor of an impedance grounded neutral system over 1000 volts must be insulated.

No, this is not permitted. Yes, it must have the same insulation as the

phase conductors. No, insulation requirements only apply to

systems under 1000 volts. Yes, it must be insulated to the maximum

neutral voltage.

16. Conductors ______ shall be permitted to be arranged as isolated phase, neutral, and grounded conductor installations.

installed in metallic raceways run underground

installed in nonmetallic raceways run underground

installed in nonmetallic raceways run aboveground

installed in metallic raceways run aboveground

17. Backfill that contains large rocks, paving materials, cinders, large or sharply angular substances, or corrosive material shall not be placed in an excavation where materials may damage ______.

grounding rods cables overcurrent protection devices meter sockets

18. Sealants for underground raceways shall be ______ for use with the cable insulation, conductor insulation, bare conductor, shield, or other components.

listed pre-approved by the AHJ identified pretreated

19. The underground installation of a circuit controlling a low-voltage lighting system of 30 volts or less ______.

may be buried less than 6 inches if specified in the installation instructions

must be buried at least 6 inches

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must be buried at least 8 inches must be left in an uncovered trench

20. Raceways shall be provided with expansion, expansion-deflection, or deflection fittings where necessary to compensate for ______.

thermal vibration thermal contraction changes of direction in the raceway the transition from indoors to outdoors

21. Raceways, cable armors, and cable sheaths shall be ______ between cabinets, boxes, fittings, or other enclosures or outlets.

continuous metallic no longer than 8 feet sealed against moisture

22. A size 10 AWG conductor in a vertical raceway must be supported ______.

at least every 200 feet only once near the top at least every 100 feet once in the middle and once at the top

23. Cabling systems listed for use in other spaces used for environmental air, shall be permitted to be installed in ducts specifically fabricated for environmental air-handling purposes if ______.

necessary to connect to equipment located in the duct

approved by the AHJ listed and approved for use in environmental

air ducts necessary to connect to air sensors for the

duct air

Quiz 71. The 2017 NEC defines ______ as the

conductive path(s) that provides a ground-fault current path and connects normally non–current-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both.

equipment bonding conductor branch circuit equipment grounding conductor bonding jumper

2. Where different ampacities apply to portions of a circuit, the higher ampacity shall be permitted to be used if the total portion(s) of the circuit with lower ampacity does not exceed ______.

10 percent of the total circuit 10 feet 10 percent of the higher ampacity circuit either 10 feet or 10 percent of the total

circuit, whichever is less

3. If cables meeting the requirements in 310.15(B)(3)(4) a through c with no more than 20 current-carrying conductors are installed longer than 24 inches without maintaining spacing, are stacked, or are supported on bridle rings, a 60 percent adjustment factor shall be applied.

True False

4. Where raceways or cables are exposed to ______ on or above rooftops, raceways or cables shall be installed a minimum distance above the roof to the bottom of the raceway or cable of 7∕8 of an inch.

direct sunlight moisture high winds indirect sunlight

5. What ampacity correction factor must be applied for a 60C-rated cable installed 1 inch above a rooftop where the maximum ambient temperature is 88F?

.96 .91 .82 1

6. What ampacity correction factor must be applied for a 90C-rated cable installed 7/8 inch above a rooftop where the maximum ambient temperature is 110F?

.96 .76 .82 .87

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7. For a service rated 100 through 400 amperes, the service conductors supplying the entire load associated with a one-family dwelling shall be permitted to have an ampacity ______.

not more than 83 percent of the service rating

not more than 83 percent of the branch circuit rating

that is at least 83 percent of the service rating

that is at least 166 amperes

8. A cable with nonmetallic sheath entering the top of a surface-mounted enclosure through a nonflexible 24-inch-long raceway ______ the fill percentage in Chapter 9 Table 1.

may exceed must be greater than may not exceed is not required to follow

9. A pair of 250 AWG compact stranded aluminum alloy conductors on a terminal are permitted to have a minimum wire bending space of ______ inches between the terminal and the wall opposite the terminal.

4 4-1/2 5 6

10. The total area of all conductors, splices, taps, and equipment at any cross section of the wiring space of an overcurrent device enclosure containing power-monitoring equipment ______ the cross-sectional area of that space.

must be at least 45 percent of must not encroach on may not exceed 75 percent of must be less than half of

11. Boxes, conduit bodies, outlet box hoods, and fittings installed in wet locations are permitted to have approved drainage openings not smaller than ______ and not larger than ______ in diameter installed in the field.

1/8 inch – 1/4 inch 1/8 inch – 3/8 inch 1/4 inch – 3/8 inch 1/4 inch – 1/2 inch

12. A wiring enclosure box with a usable volume of 42 cubic inches is divided into three equal spaces by two nonmetallic dividers. What is the usable volume of each space?

13 cubic inches 13.3 cubic inches 14 cubic inches 14.3 cubic inches

13. The 2017 NEC permits the installation of ______ 8 AWG conductors in a box partitioned into two spaces with volumes of 7.5 cubic inches and 10.5 cubic inches.

3 4 5 6

14. Where a multiconductor Type UF cable enters a metal breaker box, the cable sheath must extend at least ______ inside the box and beyond any cable clamp.

1/4 inch 3/8 inch 1/2 inch 1 inch

15. An outlet receptacle box installed within a combustible surface material must extend to the finished surface ______.

by at least 1/4 inch by no more than 1/8 inch or just below it or project beyond it

16. A junction box installation requires the drilling of some extra mounting holes. This is permitted ______.

provided the minimum number of holes are drilled

at the installer’s discretion but the holes must be approved only with pre-approval from the AHJ

17. A luminaire that weighs more than 50 pounds shall be supported independently of the outlet box, unless the outlet box is listed for ______.

heavy-duty use not less than the weight to be supported use specifically for luminaires not more than 100 pounds

18. Where a separable attachment fitting receptacle is installed inside a box, ______.

it must be included in the box fill calculation

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it must be dusttight it is not required to be included in the box fill

calculation its volume can be assumed to be 1 cubic

inch

19. A conduit body is marked with a specific quantity and type of conductors but we wish to use that conduit body with a different quantity and type of conductors. The NEC ______.

does not allow us to do so permits us to do so, provided the deviation is

approved permits this as long as the total cross-

sectional area of the fill does not exceed the cross-sectional area of the conductors specified in the marking

permits this as long as the total cross-sectional area of the fill is more than the fill percentage in Chapter 9 Table 1

20. Power distribution blocks installed on the line side of service equipment ______.

shall be approved for use in wet locations must be rated for less than 1000 volts must be listed and marked as such is required to have at least 2 openings per

pole

21. The fittings used with Type AC cable are not required to be listed provided they are approved by the AHJ.

True False

22. Type AC cable may be supported and secured by cable ties.

Yes, if that is the support method the installer wishes to use.

Yes, provided the ties are listed and identified for securement and support.

Yes, but only metal cable ties may be used for armored cable.

Yes, provided the cable is supported at least every 10 feet.

Quiz 81. Type FCC cable systems are permitted for

use in school and hospital buildings.

No, those locations are not allowed because of the potential for hazardous vapors.

Yes, they are permitted without restriction. No, it’s not permitted unless the AHJ grants

an exception. Yes, they are permitted, but only in

administrative office areas.

2. Information about ______ for medium-voltage cable is described in ANSI/NECA/NCSCB 600-2014, Standard for Installing and Maintaining Medium-Voltage Cable.

accepted industry practices and installation procedures

manufacturing processes research and development technologies non-electrical uses

3. ______ used for connecting Type MC cable to boxes, cabinets, or other equipment shall be listed and identified for such use.

Harnesses Cable ties Fittings Straps

4. Exposed runs of cable are permitted to be installed on the underside of joists provided they are supported at each joist and located ______.

parallel to duct work at least 8 inches away from water pipes perpendicular to the joists so as not to be subject to physical damage

5. Type MC cable shall be supported and secured by staples, cable ties ______, straps, hangers, or similar fittings or other approved means designed and installed so as not to damage the cable.

of metal only listed and identified for securement and

support listed and identified as nonmetallic approved as suitable

6. Type NM, Type NMC, and Type NMS cables and associated fittings ______.

must be supported at least every 12 inches can include uninsulated conductors shall be listed

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shall be approved

7. Nonmetallic-sheathed cable is permitted to be installed exposed within a dropped or suspended ceiling cavity.

No, this is never permitted. Yes, this is permitted, but only in single-

family dwellings. Yes, this is permitted, but only in one- and

two-family and multifamily dwellings. Yes, this is permitted, but only with AHJ

approval.

8. Nonmetallic-sheathed cable shall be supported and secured ______ every cable entry into enclosures such as outlet boxes, junction boxes, cabinets, or fittings.

within 12 inches of no closer than 10 inches to next to within 14 inches of

9. Type TC cables and associated fittings ______.

must be listed must be approved must be used in wet locations both of the first two answers provided

10. Type TC cable is permitted for use in cable trays with mechanically discontinuous segments spaced 10 inches apart.

True False

11. In one- and two-family dwelling units, Type TC-ER cable containing both power and control conductors shall be permitted.

Yes, the 2017 NEC allows this. No, the 2017 NEC update no longer allows

this. Yes, provided it is identified for pulling

through structural members. Yes, provided it is listed.

12. Type TC cable may be direct buried, provided ______.

the soil is mostly dry it is buried no deeper than 18 inches it is identified for such use all of the answers provided

13. The fittings for a Type USE cable ______. shall not be listed for use with other types of

cable must be field-labeled for underground use can only be used underground are required to be listed

14. For Type SE cable with ungrounded conductor sizes 10 AWG and smaller, ______, the ampacity shall be in accordance with 60°C conductor temperature rating.

where installed in an attic or crawl space and 4 AWG and larger where installed in thermal insulation if installed in a high-moisture area

15. Type UF cable must be listed. Yes, but only if it is going to be direct buried. Yes, and the fittings used with it must be

listed as well. Yes, but the fittings used with it are not

required to be listed. No, it does not yet have a product standard,

so it isn’t listed.

16. Intermediate metal conduit (IMC) shall be permitted to be installed in areas subject to severe corrosive influences where protected by corrosion protection ______ for the condition.

approved suitable listed applied

17. Rigid metal conduit (RMC) that is PVC coated for corrosion protection is permitted to be used in corrosive locations, provided it is ______.

listed for such use suitable for the condition approved for the condition recommended by the manufacturer

18. Galvanized steel RMC ______ to be installed in cinder fill where protected by corrosion protection approved for the condition.

is not permitted is listed shall be permitted shall be required

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19. Cable ties may be used to support flexible metal conduit (FMC).

Yes, this is always permitted. Yes, provided they are listed and identified

for securement and support. Yes, provided they are listed and made of

metal. No, metal conduit is too heavy to be

supported by cable ties.

20. All cut ends of liquidtight flexible metal conduit (LFMC) shall be trimmed ______ to remove rough edges.

with a listed deburring tool on the inside metal sheath if they are to be used for grounding inside and outside

21. Where used with liquidtight flexible metal conduit (LFMC), cable ties shall be ______ for securement and support.

listed and identified suitable approved and identified certified by the manufacturer

Quiz 91. Cable ties used with liquidtight flexible

nonmetallic conduit (LFNC) shall be ______ for securing and supporting.

approved nonmetallic and suitable listed as suitable for the application and nonmetallic and listed

2. The use of EMT shall not be permitted for concealed work in ______ locations.

dry hazardous wet none of the answers provided

3. Aluminum EMT shall be provided with ______ protection where encased in concrete or in direct contact with the earth.

suitable corrosion approved supplementary corrosion supplementary structural listed supplementary moisture

4. Stainless steel EMT shall be permitted to be installed in cinder fill where subject to permanent moisture when the tubing is installed at least ______ under the fill.

8 inches

12 inches 18 inches 24 inches

5. Aluminum fittings and enclosures shall be permitted to be used with galvanized steel EMT, and galvanized steel fittings and enclosures shall be permitted to be used with aluminum EMT.

No, these metals are too dissimilar to be used together.

Yes, these metals can be used together without concern for galvanic corrosion.

No, it is required to use fittings and EMT made of the same material.

Yes, provided the installation is not subject to severe corrosive influences.

6. Cable ties used with electrical nonmetallic tubing (ENT) shall be listed as suitable for the application and for securing and ______.

bundling supporting holding fixing

7. Where single paralleled conductor cables comprising each phase, neutral, or grounded conductor of an alternating-current circuit are installed in an auxiliary gutter, the conductors shall be installed in groups consisting of ______ to prevent current imbalance in the paralleled conductors due to inductive reactance.

three conductors, one of which must be ground

not more than one conductor per phase, neutral, or grounded conductor

at least four conductors no more than six conductors per bundle

8. Where a branch-circuit overcurrent plug-in device is directly supplying a readily accessible disconnect, ______.

a ladder or stairway to access the disconnect must be provided

a chain, rope or stick to operate the disconnect from the floor must be provided

a method of floor operation shall not be required

none of the answers provided

9. Conductors ______ within a metal wireway shall be installed in groups consisting of not more than one conductor per phase, neutral, or grounded conductor.

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connected in parallel larger than 10 AWG connected in series bundled together

10. The sum of the cross-sectional areas of all contained conductors and cables in a metal wireway with cross-sectional area of 36 square inches ______.

may not exceed 12.6 square inches must be at least 6 square inches may not exceed 7.2 square inches cannot be calculated prior to installation

11. Power distribution blocks installed on the line side of the service equipment shall be marked “______" or equivalent.

listed for use on the line side of service equipment

approved for use on service equipment suitable for service equipment suitable for use on the line side of service

equipment

12. Where ______ are used in cable trays, fill calculations shall apply to each divided section of the cable tray.

cable ties ungrounded conductors dividers supports

13. The temperature rating associated with the ampacity of a conductor shall be selected and coordinated so as ______ of any connected termination, conductor, or device.

not to exceed the lowest temperature rating to maximize the ampacity not to exceed the highest temperature rating to minimize the temperature rating

14. A messenger-supported wiring system may be used to support an overhead service conductor ______ that has been evaluated for the applied nominal voltage.

that must be less than 1000 volts encased in a polymeric material that must be no less than 1000 volts encased in a metallic mesh

15. Article 400: Flexible Cords and Flexible Cables covers general requirements and applications for ______.

cord sets, both listed and unlisted power supply cords, but only those rated

under 1000 volts listed power supply cords installing flexible conduit and tubing

16. Flexible cord shall be permitted to be installed above a suspended ceiling if ______ for use in other spaces used for environmental air.

listed contained within an enclosure rated for 1000 volts or less specially insulated

17. The grounded circuit conductor for a controlled lighting circuit shall be installed at the location where switches control lighting loads that are supplied by a grounded general-purpose branch circuit serving bathrooms, hallways, stairways, or rooms suitable for ______.

electric service low moisture industrial equipment human habitation or occupancy

18. Snap switches shall be connected to an equipment grounding conductor and shall provide a means to connect ______ to the equipment grounding conductor, whether or not a metal faceplate is installed.

the junction box termination fittings metallic conduit metal faceplates

19. Electronic lighting control switches shall not introduce current on the equipment grounding conductor during normal operation.

True, this is not permitted. True, but this doesn’t take effect until 2020. True, but this doesn’t take effect until 2018. True, provided they are correctly installed.

17


Quiz 101. An outlet box hood does not serve to

complete the electrical enclosure; it reduces the risk of ______ coming in contact with electrical components within the hood.

a bare conductor rodents water dirt

2. For receptacles controlled by an automatic control device, the “controlled” marking shall be located on the receptacle face and ______.

sides at least 1/8-inch high visible from at least 2 feet away visible after installation

3. A 125-volt 15- or 20-ampere receptacle that additionally provides Class 2 power shall be ______ such that the Class 2 circuitry is integral with the receptacle.

listed and constructed approved and wired moisture- and dust-resistant all of the answers provided

4. Where grounding-type receptacles are supplied through the ground-fault circuit interrupter, grounding-type receptacles or their cover plates shall be marked ______ visible after installation.

“GFCI” and “Ground Protected” “GFCI Protected” and “No Equipment

Ground” “Grounded” and “Refurbished” “Grounding-type” and “Less Than 1000

Volts”

5. When replacing a dwelling unit receptacle outlet, arc-fault circuit-interrupter protection shall not be required ______.

when the AHJ approves it where it is impracticable to provide an

equipment grounding conductor when an AFCI receptacle is not available

from a local supplier

where three of the four exception criteria have been satisfied

6. A replacement outlet receptacle in a dormitory unit ______.

must be GFCI protected must be protected by a listed AFCI circuit

breaker may be unlisted if the original receptacle

was unlisted none of the answers provided

7. Listed tamper-resistant receptacles shall be provided where replacements are made at receptacle outlets that the NEC requires to be tamper-resistant.

No, not unless the replacements are made in human occupancy areas.

Yes, this is always true. No, not unless the outlets are located in

dwelling units. Yes, except where a non-grounding

receptacle is replaced with another non-grounding receptacle.

8. Outlet receptacles shall not be installed in a face-up position in or on countertop surfaces or work surfaces ______.

because the possibility of fluids running in is a safety hazard

unless there is no other suitable place for an outlet receptacle

unless listed for countertop or work surface applications

but rather on an adjacent wall or ledge9. A flush device cover plate that additionally

provides a night light shall be ______ such that the night light circuitry is integral with the flush device cover plate.

listed and constructed listed and approved assembled and approved approved and constructed

10. A 15-amp receptacle in a wet location with weatherproof protection that does not utilize an outlet box hood ______.

isn’t required to be marked “extra duty” should be marked “water resistant” must be marked “listed for outdoor use” must be marked “extra duty”

11. 250-volt nonlocking-type receptacles in auditoriums ______.

may be approved if they are not listed are not suitable

18


shall be listed tamper-resistant receptacles must be listed and approved

12. ______ shall be placed in all service panelboards, switchboards, and switchgear such that no uninsulated, ungrounded service busbar or service terminal is exposed to inadvertent contact while servicing load terminations.

Warning stickers Barriers Rubber bumpers Insulating foam

13. The label for a panelboard supplied by a feeder in an industrial building must be

permanently marked to indicate where the power originates; it must be permanently affixed, ______, and not handwritten.

waterproof approved by the AHJ of sufficient durability to withstand the

environment involved of sufficient durability to withstand a

hazardous environment

14. If an industrial control panel is required to be marked with a short-circuit current rating, the available short-circuit current at the industrial control panel and ______ shall be documented and made available to those authorized to inspect the installation.

the date and time the short-circuit current calculation was performed the name of the person who performed the short-circuit calculation the date of the original installation and the name of the inspector the date the short-circuit current calculation was performed

15. The location of the means necessary to disconnect all circuits in an industrial control panel that are ______ shall be documented and available.

50 volts or more 100 volts or less at least 250 volts no more than 1000 volts

16. A luminaire shall be permitted to be installed with ______ terminating in a grounding-type attachment plug or busway plug.

an approved conductor a cord a bare conductor a listed cable tie

17. A luminaire assembly equipped with ______ and canopy shall be permitted to use a cord connection between the luminaire assembly and the canopy.

a supplemental support a strain relief an external switch all metallic parts

23.

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Tables for quiz questions

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Abbreviated Table 250.122 Minimum Size Equipment Grounding Conductors for Grounding Raceway and Equipment


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Chapter 9 Table 1. Percent of Cross Section of Conduit and Tubing for Conductors and Cables

· web viewif a grounding electrode conductor is connected to a single concrete-encased electrode...

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