Final Exam 1 for 2020 Journeyman Electrician

Fill in the blank:

Where not in excess of 1000 volts, the MINIMUM permitted height of service-drop conductors installed over an apple orchard or orange grove is ________ above ground.

18 feet

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Fill in the blank:

The purpose of the NEC® is ________.

the practical safeguarding of persons and property

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Fill in the blank:

For the purpose of maintaining electrical equipment such as panelboards, switchboards, motor control centers and switchgear of 1000 volts or less, the width of the working space in front of the equipment shall be the width of the equipment or NOT less than ________, whichever is greater.

30 inches

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Fill in the blank:

All 15- and 20-ampere 125-volt, single-phase straight blade-type receptacles located in ________ shall be listed as tamper-resistant.
a. dormitories
b. waiting rooms of dental offices
c. elementary schools
d. all of these

d. all of these

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When wiring motor fuel dispensing pumps, the first fitting that should be installed in the raceway that emerges from below ground or concrete into the base of the gasoline dispenser is a/an:

sealing fitting.

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Fill in the blank:

One kVA is equal to ________.

one thousand volt-amps

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Fill in the blank:

A 15 kW, 208-volt, single-phase heat-pump has a full-load current rating of ________.

65 amperes

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Fill in the blank:

When sizing the overcurrent protection for a single non-motor operated appliance such as a storagetype water heater, cooktop or range, which of the following need NOT to be taken into consideration?
a. The length of time the appliance operates.
b. The full-load current marked on the appliance.
c. The voltage rating of the appliance.
d. Where the overcurrent protection device selected is not a standard size.

d. where the overcurrent protection device selected is not a standard size

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When installed, a metal junction box will contain the following conductors:

three - 6 AWG wires, 2 ungrounded & 1 grounded
one - 8 AWG equipment grounding conductor
two - internal clamps
one - pigtail

Determine the MINIMUM size box, in cubic inches, the NEC® requires.

23 cubic inches

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Fill in the blank:

As a general rule, round access openings in a manhole shall NOT be less than ________ in diameter.

26 inches

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Fill in the blank:

Strut-type channel raceways shall be permitted to be suspension mounted in air with identified methods at intervals NOT to exceed ________.

10 feet

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One- and two-family dwelling unit services are required to be provided with:

I. an emergency service disconnect.
II. a surge-protective device (SPD).

Both I and II

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Determine the MINIMUM size 75 deg. C rated copper conductors required to supply a fixed electric space heating unit with heating elements having a full-load current rating of 125 amperes and a blower motor having a full-load current rating of 2.5 amperes.

2/0 AWG

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Fill in the blank:

Where a thermal protector is integral with the motor, the ultimate trip current of a thermally protected 2 horsepower, single-phase, 240-volt motor shall NOT exceed ________ of the full-load current of the motor.

156 percent

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Under which one of the following conditions are you required to use an approved electrically conductive corrosion resistance compound on metal conduit threads?

On field cut threads in corrosive locations.

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Fill in the blank:

Disregarding exceptions, each patient bed location in general care (category 2) spaces of hospitals shall be provided with a MINIMUM of ________ “hospital grade” receptacles.

eight

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Fill in the blank:

Where a receptacle outlet is installed for a specific appliance, such as a washing machine located in a laundry room, the outlet shall be installed within at LEAST ________ of the intended location of the appliance.

6 feet

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Fill in the blank:

In general, overhead service-drop conductors shall NOT be smaller than size ________.

8 AWG copper

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What MINIMUM size wire-type bonding conductor must bond all metal parts associated with a hot tub?

8 AWG

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Fill in the blank:

When installing galvanized rigid metal conduit (RMC), where structural members readily permit fastening, the conduit is required to be fastened within at LEAST ________ of a junction box, panelboard or cabinet.

3 feet

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Fill in the blank:

A ground ring is permitted for use as a grounding electrode where consisting of at least ________ of bare copper conductor not smaller than ________ and buried not less than ________ below the surface of the earth.

20 feet, 2 AWG, 30 inches

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Fill in the blank:

Given: A 240-volt wye-connected motor derives power from a converted single-phase source. It is desired to connect a 120/240-volt transformer for control of the motor on the load side of the converter. The control transformer must ________.

not be connected to the manufactured phase

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What is the MAXIMUM size overcurrent protection device required to protect size 14 AWG conductors used for the pump motor control-circuit that is protected by the motor branch circuit protection device and extends beyond the enclosure?

45 amperes

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Fill in the blank:

Where raceways are installed above grade outdoors and exposed to the weather, the interior of these raceways shall be considered to be a ________ location.

wet

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# Fill in the blank: In dwelling units, hallways of at LEAST \_\_\_\_\_\_\_\_ or more in length shall be provided with at least one 125-volt, 15- or 20-ampere rated receptacle.

10 feet

# Fill in the blank: A motor overload device functions in direct response to \_\_\_\_\_\_\_\_.

Motor current

# Fill in the blank: When a cord-and-plug connected water softener is wired to a 20-ampere rated branch-circuit, the SMALLEST size flexible cord to supply the water softener as permitted by the NEC® is size \_\_\_\_\_\_\_\_.

16 AWG

When twenty (20) size 10 AWG copper current-carrying conductors with THHN insulation are installed in a 50-feet run of trade size 11⁄2 in. electrical metallic tubing (EMT), what is the ampacity rating of each of the size 10 AWG conductors?

20 amperes

# Fill in the blank: Flexible metal conduit (FMC) is permitted for use in wet locations \_\_\_\_\_\_\_\_.

under no circumstances

# Fill in the blank: The MINIMUM size copper wire that may be used for grounding the secondary of an instrument transformer is \_\_\_\_\_\_\_\_.

12 AWG

In general, what statement is TRUE regarding the required disconnecting means for a fluorescent luminaire?

The disconnecting means shall simultaneously break all supply conductors to the ballast, including the grounded conductor, when connected to a multiwire branch circuit.

# Fill in the blank: Class 1 control-circuit conductors and motor branch-circuits are permitted by the NEC® to occupy the same raceway, if the control circuit conductors \_\_\_\_\_\_\_\_.

are functionally associated with the motor system

# Fill in the blank: As confirmed by the NEC®, where a flat cable assembly, Type FC, is installed less than \_\_\_\_\_\_\_\_ above the floor or fixed working platform, where not subject to physical damage, it shall be protected by a cover identified for the use.

Eight feet

# Fill in the blank: A feeder supplying two (2) continuous-duty, 208-volt, 3-phase motors, one 10 hp and one 71⁄2 hp shall have a MINIMUM ampacity of \_\_\_\_\_\_\_\_ amperes.

62.70

# Fill in the blank: The reason the NEC® requires all phase conductors of the same circuit to be in the same ferrous metal raceway is to reduce \_\_\_\_\_\_\_\_.

inductive heat

Which of the following conductor insulation types, if any, is/are acceptable for wiring in a fluorescent luminaire when the branch circuit conductor passes within three (3) inches of the ballast? I. THW II. THWN

I only

# Fill in the blank: Where practicable, a separation of at LEAST \_\_\_\_\_\_\_\_ shall be maintained between communications wires and cables on buildings and lightning conductors.

6 feet

# Fill in the blank: A fluorescent luminaire shall be permitted to be cord connected \_\_\_\_\_\_\_\_.

except at terminations, where the flexible cord is visible for its entire length

# Fill in the blank: Wiring located above heated ceilings shall be spaced at not less than 2 inches above the heated ceiling and shall be considered as operating at an assumed ambient temperature of not less than \_\_\_\_\_\_\_\_.

50oC

# Fill in the blank: An equipotential bonding grid must be installed in the deck around a permanently installed swimming pool; the bonding grid shall extend for at LEAST \_\_\_\_\_\_\_\_ horizontally beyond the inside walls of the pool.

3 feet

# Fill in the blank: Where not in excess of 1000 volts, open overhead service conductors over public driveways are required to maintain a vertical clearance of NOT less than \_\_\_\_\_\_\_\_ from final grade.

18 feet

# Fill in the blank: All permanently installed spa and hot tub equipment located in non-dwelling occupancies shall be provided with an emergency shutoff or control switch within sight of the unit(s), and located NOT less than \_\_\_\_\_\_\_\_ from the inside wall of the spa or hot tub.

5 feet

# Fill in the blank: Feeders to floating buildings and piers are permitted to be installed in \_\_\_\_\_\_\_\_ where flexible connections are required.

extra-hard usage portable power cable

# Fill in the blank: Where a building or structure is supplied with a 3-phase, 480Y/277-volt service, each disconnecting means rated at LEAST \_\_\_\_\_\_\_\_ or more shall be provided with ground-fault protection.

1000 amperes

# Fill in the blank: In a marina, receptacles intended to supply shore power for boats shall be mounted not less than \_\_\_\_\_\_\_\_ above the deck surface of the pier and not below the electrical datum plane on a fixed pier.

12 inches

# Fill in the blank: Branch circuit conductors supplying a varying duty motor with a 30-minute and/or 60-minute rating shall have an ampacity of at LEAST \_\_\_\_\_\_\_\_ of the nameplate rating of the motor to be supplied.

150 percent

# Fill in the blank: Cablebus shall be installed only for \_\_\_\_\_\_\_\_ locations.

exposed

# Fill in the blank: Solar photovoltaic system dc circuits on or in one- and two-family dwellings shall be permitted to have a voltage of no greater than \_\_\_\_\_\_\_\_ .

600 volts

# Fill in the blank: A hospital conference room is considered to be an assembly occupancy when designed for the assembly of at LEAST \_\_\_\_\_\_\_\_ or more persons.

100

Determine the MINIMUM required size 75 deg. C rated copper conductors to supply a demand load of 200 amperes where installed in an area with an expected ambient temperature of 120 deg. F

300 kcmil

# Fill in the blank: Where concrete encased, raceways approved for burial only shall require a concrete envelope NOT less than \_\_\_\_\_\_\_\_ thick.

2 inches

# Fill in the blank: Overhead communications wires and cables shall have a separation of at LEAST \_\_\_\_\_\_\_\_ from supply service-drops of 0-750 volts at any point in the span.

12 inches

# Fill in the blank: In general, electrical nonmetallic tubing (ENT) shall be securely fastened in place within at LEAST \_\_\_\_\_\_\_\_ of each outlet box, junction box, or panelboard.

36 inches

# Fill in the blank: Where flexible cord has one conductor identified by a ridge on the exterior of the cord, this conductor is identified as a/an \_\_\_\_\_\_\_\_ conductor.

grounded

# Fill in the blank: Where a raceway enters a building or structure from an outside underground distribution system, it shall be \_\_\_\_\_\_\_\_.

sealed

# Fill in the blank: Equipment grounding conductors used for systems over 1 kV that are not an integral part of a cable assembly shall NOT be smaller than \_\_\_\_\_\_\_\_ copper.

6 AWG

What is the MAXIMUM number of size 4 AWG THHN copper conductors permitted to be installed in a trade size 11⁄4 in. electrical metallic tubing (EMT) having a length of 18 inches?

What is the MINIMUM size 75 deg. C copper ungrounded (phase) service entrance conductors permitted for a 200-ampere rated commercial service?

3/0 THW

# Fill in the blank: Where a surfaced-mounted luminaire containing a ballast, transformer, LED driver, or power supply is to be installed on combustible low-density cellulose fiberboard, it shall be marked for this condition or shall be spaced NOT less than \_\_\_\_\_\_\_\_ from the surface of the fiberboard.

1 1/2in

# Fill in the blank: The NEC® specifies that \_\_\_\_\_\_\_ cable has an overall covering that is fungus resistant.

Type NMC

# Fill in the blank: The conductors in multiconductor portable cables of over 600 volts, used to connect mobile equipment and machinery, shall be at LEAST size \_\_\_\_\_\_\_\_ copper or larger and employ flexible stranding.

12 AWG

# Fill in the blank: Where installed for a temporary electrical service in a wet location at a construction site, all \_\_\_\_\_\_\_\_ receptacles shall be listed as weather-resistant.

250-volt, 20-ampere, straight-blade

Given: Conductors of not over 25 ft. long are to be tapped from a service where two (2) parallel size 500 kcmil copper conductors per phase are protected by an 800 ampere overcurrent protection device. The tap conductors will terminate in a single circuit breaker. What MINIMUM size THW copper conductors are required for the tap conductors?

300 kcmil

# Fill in the blank: Disregarding exceptions, the MINIMUM size grounded or ungrounded conductors permitted to be connected in parallel (electrically joined at both ends) is \_\_\_\_\_\_\_\_.

1/0 AWG

Given: A 12 unit condo will have an 8 kW electric range in each unit; apply the optional method of calculation for multifamily dwellings and calculate the demand load, in kW, on the ungrounded (line) service entrance conductors for the electric ranges.

39.4 kW

# Fill in the blank: Information technology equipment shall be permitted to be connected to a branch circuit by a powersupply cord having a length NOT to exceed \_\_\_\_\_\_\_\_.

15 feet

# Fill in the blank: The classification of hazardous areas and zones is to be determined by \_\_\_\_\_\_\_\_.

qualified persons

# Fill in the blank: When installing border lighting for stages in theaters, the luminaires shall be arranged so that no branch circuit will carry a load to exceed \_\_\_\_\_\_\_\_.

20 amperes

# Fill in the blank: Where a single device wider than two (2) inches is installed in a 2-gang device box, the device is to be counted as equal to \_\_\_\_\_\_\_\_ conductor(s).

four

# Fill in the blank: When counting the number of circuit breakers in a panelboard, a 3-pole circuit breaker shall be considered as \_\_\_\_\_\_\_\_ overcurrent protective device(s).

three

# Fill in the blank: Type AC cable shall be permitted \_\_\_\_\_\_\_\_.

For feeders

# Fill in the blank: Where conductors carrying alternating current are installed in ferrous metal raceways, \_\_\_\_\_\_\_\_ .

all phase conductors, and where used, the grounded conductor and equipment grounding conductor shall be grouped together

# Fill in the blank: Where a run of electrical metallic tubing (EMT) with compression-type fittings is installed \_\_\_\_\_\_\_\_ a wire-type equipment grounding conductor is required to be installed in the EMT with the circuit conductors.

outdoors on a roof supplying a roof top HVAC unit

# Fill in the blank: A neutral conductor is always \_\_\_\_\_\_\_\_.

the conductor connected to the neutral point of a system that is intended to carry current under normal conditions

Given: A one-family dwelling supplied by a single-phase, 120/240-volt system has a calculated demand load of 42,000 VA. What MINIMUM size XHHW aluminum conductors are required for the ungrounded (line) service-entrance conductors?

2/0 AWG

# Fill in the blank: The ungrounded, grounded and equipment grounding conductors of Type TC cables shall be in sizes \_\_\_\_\_\_\_\_ to 1000 kcmil copper, nickel, or nickel-coated copper.

14 AWG

# Fill in the blank: In general, all panelboards are required to have overcurrent protection, an EXCEPTION to this rule is \_\_\_\_\_\_\_\_.

for existing panelboards used as service equipment in an individual residential occupancy

# Fill in the blank: Where a motor controller that is not an inverse time circuit breaker or molded case switch, controls a 120 hp, continuous-duty, ac motor of not over 600 volts, the controller shall have a horsepower rating of NOT less than \_\_\_\_\_\_\_\_ .

120 hp

# Fill in the blank: Overload relays and other devices for motor overload protection that are NOT capable of opening short-circuits or ground-faults shall be protected by a motor short-circuit protector or by \_\_\_\_\_\_\_\_.

fuses or circuit breakers

# Fill in the blank: An electrical system comprised of multiple power sources is known as a/an \_\_\_\_\_\_\_\_ .

hybrid system

Final Exam 1 Flashcards

A comprehensive assessment covering NEC® concepts, calculations, and regulations from all units to evaluate knowledge and readiness for the Master Electrician 2020 exam.