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NEC 2014 > NEC Test > Flashcards

NEC Test Flashcards

1
Q

What does “FLC” mean?

A

Full load current

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2
Q

An electrical device that consists of a frame, a plunger and uses an up and down motion to operate is
called what?

A

solenoid

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3
Q

Types of equipment grounding conductors?

A

Rigid metal conduit and Electrical metal tubing

250.118 Types of Equipment Grounding Conductors

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4
Q

What is the cross-sectional area in circular mils of a solid wire with diameter of 0.102?

A

10,380

Table 8 Conductor Properties

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5
Q

A restaurant has a 15.5-foot plug strip for all their television systems which are likely to be used at
the same time. What is the VA?

A

2880

220.14 Other Loads — All Occupancies

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6
Q

An apartment has 8 water heaters at 800 watts, what is the VA?

A

6400

422.13 Storage-Type Water Heaters.

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7
Q

What is the expansion rate of 500 feet of type RTRC. That goes from a temperature change of 80 (F)
degrees to 50 (F) degrees?

A

2.7

Table 355.44

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8
Q

240 volts to ground, 200 amp panels in condition 3 needs a minimum front clearance of?

A

4 ft

Table 110.26(A)(1) Working Spaces

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9
Q

What is the minimum clearance in front of a service panel?

A

3 ft

Table 110.26(A)(1) Working Spaces

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10
Q

The width of the 120/ 240 volt panel working area shall be a minimum of __inches, and the door shall
be open, able to at least 90°.

A

30 inches

110.26 Spaces About Electrical Equipment

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11
Q

Manhole covers shall have a minimum weight of?

A

100 lbs

110.73 Equipment Work Space

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12
Q

A 240-volt boat hoist receptacle has to be?

A

GFCl protected

210.8 Ground-Fault Circuit-Interrupter Protection for Personnel

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13
Q

What is the minimum rating for a laundry circuit in a single family dwelling?

A

20 amps 1500 watts

220.52 Small-Appliance and Laundry Loads — Dwelling Unit

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14
Q

A receptacle on an individual branch circuit can be rated for what percent?

A

100%

210.21 Outlet Devices

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15
Q

What size branch circuits shall supply only non-lighting loads?

A

Larger Than 50 Amperes

210.23 Permissible Loads, Multiple-Outlet Branch Circuits

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16
Q

What type of lamp holder shall be connected to a load in excess of 20 amps?

A

Heavy duty

210.21 Outlet Devices

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17
Q

The laundry outlet shall be installed within how many feet of the designated appliance location?

A

6 ft

210.50 General

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18
Q

Receptacle outlet in the floor shall not be counted as part of the required number of wall receptacle
outlets unless located within how man inches of the wall?

A

18 inches

210.52 Dwelling Unit Receptacle Outlets

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19
Q

What is the minimum number of small appliance circuits for a single-family dwelling?

A

2 circuits

210.11 Branch Circuits Required

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20
Q

Other than counter-top appliances, what type of device is allowed to utilize the small appliance
circuits in a single family dwelling?

A

small-appliance branch circuits
required by 210.11(C)(1) shall serve all wall and floor recepta‐
cle outlets covered by 210.52(A)

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21
Q

Receptacle outlets shall be installed so that no point along the wall line of a kitchen countertop is
more than __inches measured horizontally from a receptacle outlet in that space.

A

24 inches

210.52 Dwelling Unit Receptacle Outlets

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22
Q

What is the minimum length of a countertop in a kitchen that requires the installation of a receptacle?

A

12 inches

210.52 Dwelling Unit Receptacle Outlets

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23
Q

Island counter tops, with a minimum dimension of 12” W x 24” D, must have at least __
receptacle outlet.

A

1

210.52 Dwelling Unit Receptacle Outlets

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24
Q

18 feet of show window requires how many receptacles above the window?

A

1

210.62 Show Windows

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25
Q

What is the maximum distance from a rooftop unit that the rooftop GFCI service receptacle shall be
located?

A

25 ft

210.63 Heating, Air-Conditioning, and Refrigeration Equipment Outlet.

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26
Q

A conference room is 250 sq. ft and has a 12.5-foot wall. How many floor receptacles are needed?

A

1

210.71 Meeting Rooms.

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27
Q

Does a vehicle garage door (OUTSIDE) require illumination under the illuminated entryway rule?

A

No

210.70 Lighting Outlets Required.

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28
Q

General branch circuit lighting load for a hospital shall be calculated at __watts per square foot?

A

2 watts

Table 220.12 General Lighting Loads by Occupancy

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29
Q

In dwelling units, new additions to the lighting branch circuit shall be calculated in accordance with
220.12 when over __ square feet.

A

500

220.16 Loads for Additions to Existing Installations.

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30
Q

Where SE cable enters the building, the conduit has to be?

A

Sealed

230.8 Raceway Seal

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31
Q

The conductors for festoon lighting shall be supported by messenger wire in all spans exceeding?

A

40 ft

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32
Q

What is the minimum service rating for a single-family dwelling with 6 or more 2 wire branch
circuits?

A

100 amps

230.79 Rating of Service Disconnecting Means.

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33
Q

Circuit breakers used as switches in 120-volt fluorescent lighting shall be marked as?

A

SWD and HID

240.83 Marking.

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34
Q

What is the minimum height of a service entrance conductor above a pedestrian sidewalk?

A

10 ft

230.24 Clearances

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35
Q

What is the maximum number of disconnects at the main service?

A

6

230.71 Maximum Number of Disconnects.

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36
Q

What is the minimum service disconnect of a commercial building?

A

60 amps

230.79 Rating of Service Disconnecting Means.

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37
Q

What cannot be connected to the supply side of a service disconnect.

A

230.82 Equipment Connected to the Supply Side of Service

Disconnect

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38
Q

When fuses serve as overcurrent protection, a disconnecting means shall be supplied on the line side
of all fused circuits that exceed 150 volts if the fuses are accessible to who?

A

Qualified personnel

240.40 Disconnecting Means for Fuses

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39
Q

Edison base fuse holders shall be a maximum of what voltage?

A

125 volts

240.51 Edison-Base Fuses.

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40
Q

Edison base fuses shall not operate at over?

A

30 amps

240.51 Edison-Base Fuses.

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41
Q

A type S fuse is installed in an Edison base fuse holder for what primary reason?

A

Non-interchangeable

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42
Q

A grounding electrode conductor may be spliced together by?

A

Splicing of the wire-type grounding electrode conductor
shall be permitted only by irreversible compression-type
connectors listed as grounding and bonding equipment
or by the exothermic welding process.

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43
Q

The green screw in a main panel enclosure serves as what?

A

Main bonding jumper

250.28 Main Bonding Jumper and System Bonding Jumper

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44
Q

High impedance ground systems operate at a minimum of what voltage?

A

480 volts

250.36 High-Impedance Grounded Neutral Systems.

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45
Q

A concrete encased electrode with electrically conductive coated steel reinforcing bars shall be at
least __ in diameter and a minimum of 20 feet in continuous length.

A

1/2 inch

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46
Q

What is the minimum size wire for a ground ring?

A

2 AWG

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47
Q

How many feet of a rod electrode be in contact with the earth?

A

8 ft

250.53 Grounding Electrode System Installation

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48
Q

A ground rod shall be at least how many inches in diameter?

A

5/8 inch

250.52 Grounding Electrodes.

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49
Q

What is the minimum space between ground rods?

A

6 ft

250.53 Grounding Electrode System Installation

50
Q

What size grounding electrode conductor must always be protected from physical damage?

A

6 AWG and smaller

250.64 Grounding Electrode Conductor Installation

51
Q

When a metal enclosure is required to protect the grounding electrode conductor, the enclosure has to
be bonded to what at both ends?

A

At both ends

250.64 Grounding Electrode Conductor Installation.

52
Q

What is the minimum size main bonding jumper for an 800 Kcmil service entrance conductor?

A

2/0 copper or 4/0 Aluminum or
Copper-Clad
Aluminum

53
Q

What is the minimum size copper grounding electrode conductor for a 200 amp single phase dwelling copper feeder?

A

4 AWG

Table 250.66 Grounding Electrode Conductor for AlternatingCurrent Systems

54
Q

The minimum distance any edge of a stud must be from the edge of a hole for nm cable is?

A

1 1/4 inch

300.4 Protection Against Physical Damage

55
Q

When direct burial exit the ground, what shall they be enclosed in?

A

Raceway

56
Q

At what rated voltage does direct burial cable have to be shielded?

A

3,000 volts

57
Q

What is the minimum size wire needed to supply a 100 amp single phase, 3 wire main service on a
mobile home?

A

4 AWG

58
Q

What is the overcurrent protection for 8 #12 THWN conductors in a 1/2 in pipe?

A

20 amps

59
Q

A single family dwelling has a 100 amp service. What size feeder will be required to supply a 75 amp
electric space heater and a 25 amp air conditioner?

A

4 AWG

60
Q

If you have 4 sets of 4 inch PVC with 500 Kemil THW copper wire in each pipe, what is the minimum size fused disconnect that can be installed?

A

1600 amps

61
Q

What is the minimum size THW conductor that can be used to supply a 200 amp single phase
commercial building?

A

3/0 copper

62
Q

What type of conductor is rated for direct burial?

A

UF

63
Q

When using a round box where conductors or connectors requiring the use of locknuts or bushings are
to be connected, to what part of the box can they not be connected?

A

Side of the box

314.2 Round Boxes

64
Q

Type NM cable shall be approved for installing under the lower edges of a joist in crawlspaces if the wire is at least three __ AWG.

A

8 AWG

334.15 Exposed Work.

65
Q

What is the required free space in a junction box for a #10 conductor?

A

2.5 cubic inches

66
Q

What is the maximum number of #14 conductors allowed in a 4” x2 12” metal octagonal trade size box?

A

10

314.16

67
Q

Type NM cable shall be secured how many inches from a non-metallic box if there is no clamp?

A

8 inches

68
Q

A fixture box shall be independently supported if the fixture weighs more than how many pounds?

A

50 Ibs

314.27 Outlet Boxes

69
Q

Floor boxes must be made of what?

A

UL listed

314.27 Outlet Boxes

70
Q

Photovoltaic supply can be run in what type of raceway

A

MC

71
Q

What is the maximum distance from a panel that a type MI cable must be secured?

A

6 feet

72
Q

What is the temperature rating for the conductor of type NM CABLE?

A

60C

334.80 Ampacity

73
Q

What type of cable is not approved for service entrance cable?

A

UF

340.12 Uses Not Permitted

74
Q

For gas stations__can be used as a raceway under Class 1 Division 1 under 6 inches of fill dirt?

A

RMC and IM

75
Q

10 feet of equipment grounding conductor cannot be made of what?

A

FMC

76
Q

What is the maximum distance between supports for a 1” rigid PVC

A

3 feet
Table 352.30 Support of Rigid Polyvinyl Chloride Conduit
(PVC)

77
Q

What is the expansion rate of 250 feet of PVC that goes from a temperature change of -20 F to 80 F.

A

10.15

78
Q

Type RTRC shall be permitted to be unsupported where the raceway is not more than __ long and remains in unbroken lengths and terminated in an outlet box.

A

3 feet

355.30 Securing and Supporting

79
Q

What is the maximum number of conductors allowed in an auxiliary gutter?

A

30

80
Q

What color triangle marking will be on a noise-cancelling outlet

A

Orange

406.3 Receptacle Rating and Type

81
Q

Light poles shall have a handhole of not less than __

A

2” x 4”

410.30 Supports

82
Q

What is the minimum space between a recessed fixture and thermal insulation?

A

3 inches

410.116 Clearance and Installation

83
Q

A furnace has to be run on what type of circuit?

A

Individual branch circuit

424.3 Branch Circuits.

84
Q

Electrically operated kitchen waste disposers shall be permitted to be cord and plug connected with a
flexible cord not more than how many inches and not less than how many inches?

A

36 and 18

85
Q

What type of cable does a garbage disposal cord have to be made of?

A

Listed for use

422.16 Flexible Cords.

86
Q

By what percent is the FLC of a wound rotor motor multiplied, to determine the motors minimum
OCPD using inverse time breaker?

A

150

87
Q

Disconnecting means for motor circuits rated 600 volts, or less shall have an ampere rating not less then ___ percent of the FLC rating?

A

115

88
Q

What is the Maximum surface temperature of T2A?

A

536 F
Table 500.8(C) Classification of Maximum Surface
Temperature

89
Q

An outdoors gasoline dispensing device up to 18” above grade level within 20” horizontally of any edge of the enclosure is?

A

Class I division II

514.3 Classification of Locations

90
Q

In gas stations, how far from the floor up is class 1 division 1

A

18 inches

91
Q

Liquid propane indoor storage tank are class division within 5’ of tank.

A

Class I division I

Table 515.3 Electrical Area Classifications

92
Q

Occupancy of __ people or more must be wired in MC or Conduit.

A

100

93
Q

In health care facilities, the EM light circuit shall be wired on the

A

Life safety branch circuit

94
Q

What type of cable can’t be used as a ground for critical and EM branch circuits of a hospital

A

Isolated ground

95
Q

Anesthetizing locations shall be classified as ___ and the location will extend upwards
to a level of ___

A

Class I division I and 5 feet

96
Q

Disconnecting means for a mobile home shall be a minimum of what height?

A

2 feet
550.11 Disconnecting Means and Branch-Circuit Protective
Equipment

97
Q

In general care areas, each patient bed location shall be provided with a minimum of __ receptacles.

A

8

517.18 General Care

98
Q

Fora mobile home, the grounded conductor shall be ___

A

Insulated

550.16 Grounding

99
Q

A boat hoist receptacle shall be mounted not less than __ above the deck surface of the pier
and not below the electrical datum plane on a fixed pier.

A

12 inches

555.9 Electrical Connections.

100
Q

Indoor receptacle for an electric vehicle charging station shall be mounted at a minimum height of?

A

18 inches

625.102 Construction

101
Q

For Photovoltaic systems, what cannot be connected to the supply side?

A

Non overcurrent device

102
Q

What size branch circuit is required for a sign outside a commercial pedestrian door?

A

20 amp

600.5 Branch Circuits

103
Q

Commercial buildings with accessibility to pedestrians shall provide at least one __ receptacle,

A

20 amp

600.5 Branch Circuits.

104
Q

Neon tubing exceeding 1000 volts shall not be installed in?

A

Dwelling units

600.32 Neon Secondary-Circuit Wiring, over 1000 Volts, Nominal.

105
Q

In office partisans, the flexible power cord shall not exceed __ in length.

A

2 feet

605.5 Office Furnishing Interconnections

106
Q

Bonding to a pool grid has to have what type of devices?

A

Pressure devices

250.8 Connection of Grounding and Bonding Equipment.

107
Q

Direct Current Turbines shall be installed in?

A

MC

694.30 Permitted Methods.

108
Q

Where a portable optional standby source is used as a ___ it shall be grounded to a grounding electrode.

A

Generator

702.11 Portable Generator Grounding

109
Q

How many inches has to be separated between class 2 and class 3 circuits

A

2 inches

110
Q

Class 1 power limited circuits shall be supplied by a source having a rated output of not more than how many volts and volts amp?

A

30 volts, 1000VA
725.41 Class 1 Circuit Classifications and Power Source
Requirements.

111
Q

Communication wire shall have a minimum voltage of __ volts?

A

300

112
Q

Hybrid communication wire shall have a minimum voltage of ___ volts?

A

600

Table 800.179 Cable Markings

113
Q

Where critical care locations are served from ______ on the essential electrical system
the general care circuits from the two separate systems shall be kept independent of each other.

A

Transfer systems

114
Q

Maximum conductor fill rate for all types of conduit (over 24” in length) with over 2 conductors including cellular concrete raceways is?

A

40%
Table 1 Percent of Cross Section of Conduit and Tubing for
Conductors and Cables

115
Q

An electrical tubing nipple is defined as tubing __ or less in length and may be filled to a
maximum __% of the total available internal square inch area, of the tubing.

A

24 inches and 60%

116
Q

How many #8 THHW, compact conductors can be placed inside 1” EMT trade size conduit?

A

6

Page 717

117
Q

What size RMC pipe is needed for the total square inch area (include insulation) of: (4) #8 THHN
and (6) #10 THHN wires?

A

1 inch

118
Q

What is the smallest size conductor you can run in parallel?

A

1/0
250.24 Grounding Service-Supplied Alternating-Current
Systems.

119
Q

What is the smallest size grounded conductor you can run in parallel?

A

1/0

120
Q

Class 3 inherently limited power source circuits are not rated for over how many volts?

A 
100 volts
Table 12(A) PLFA Alternating-Current Power Source Limitations

NEC 2014 (2 decks)

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