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PEC > PEC 2 > Flashcards

PEC 2 Flashcards

1
Q

Where flexible tubing is used to encase the conductors, the tubing shall extend from the last insulating support to NOT less than _____(mm).

A

6.4 mm

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2
Q

Metal raceways, enclosures, frames and other non-current carrying metal parts of electric equipment shall be kept at least ______(mm) distance from lightning rod conductors.

A

1,900 mm

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3
Q

Where no standard electrical equipment of the exact size or rating is available and the next larger size is neither available the next smaller size or rating maybe used provided a special permission is obtained from ___________

A

Electrical Inspector

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4
Q

Instruments, pilot lights, potential transformers and other switchboard devices with potential coils shall be supplied by a circuit that is protected by a standard over-current device rated up to ___(A)

A

15 A

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5
Q

___ is a wire or other mechanical member having one end secures and the other end fastened to a pole maintained under tension

A

Guy (Guy wire)

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6
Q

Below the factors that affect the ampacity of an electrical conductor EXCEPT one. Which one is this?

Insulation resistance
Length of the conductor
Conductor material
Cross-sectional area of the conductor

A

Insulation resistance

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7
Q

For circuits over 600 V nominal, conductors shall NOT be bent to a radius less than ____ the diameter for shielded or lead covered conductors.

A

12 times

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8
Q

Which of the following statement about over-current devices is NOT correct?

It shall be located where they will not be exposed to physical damage.
It shall be readily accessible.
It can be located inside clothes closets.
In a multi-family dwelling, each occupant shall have ready access to over-current device protecting his occupancy.

A

It can be located inside clothes closets.

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9
Q

Which of the following statements is NOT true?

Conductors in raceways shall be continuous between outlets.
Metal raceways, boxes, cabinets and fittings shall be grounded.
Metal or non-metallic raceways shall be continuous between cabinets, boxes or other enclosures.
Raceway shall be used as a means of support for other raceways.

A

Raceway shall be used as a means of support for other raceways.

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10
Q

For receptacle outlets, each single or each multiple receptacle on one strap shall be considered NOT less than ____(VA).

A

180 VA

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11
Q

Corner joints on a gutter shall be made tight, where the assembly is held together by rivets or bolts. The spacing shall NOT be more than _____(mm).

A

NOT be more than 300 mm

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12
Q

is the total number of mechanical degrees that a PVC conduit run maybe bent between pull joints (pull boxes, junction boxes or utility boxes).

A

360 degrees

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13
Q

The minimum size of wire used in electrical wiring is the former #14 AWG. Under the SI standard in the PEC, what is the diameter of this wire?

(1.2 mm, 2.0 mm, 1.5 mm, 1.6 mm).

A

1.6 mm

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14
Q

is a box with a blank cover which is inserted in one or more runs of raceway to facilitate pulling of the conductors.

A

Pull box

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15
Q

The neutral conductor from the neutral point of the transformer or generator to its connection point to the grounding impedance shall be __________ .

A

shall be fully insulated

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16
Q

The sum of the cross sectional area of all conductors in a wireway must _______% of the cross-sectional area of the wireway.

A

NOT exceed 20%

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17
Q

. Circuit containing electric discharge lighting transformer exclusively shall NOT be rated in excess of ___(A).

A

30 A

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18
Q

For ranges of 8.75 kW or more in rating, the minimum branch circuit required shall be ___(A)

A

40 A

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19
Q

Lighting fixtures shall be wired with a fixture flexible cord with a cross-sectional area of NOT less than _______(mm2)

A

0.75 mm2.

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20
Q

If the setting of over-current device in a circuit ahead of equipment is 60 A, the minimum required grounding conductor using copper is______(mm2).

A

5.5 mm2

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21
Q 
Mineral insulated metal sheathed cable shall be permitted in any of the following installations EXCEPT one. Which one is this?
For control circuits
Where exposed to oil and gasoline
For feeder circuits
Where exposed to corrosive atmosphere
A

Where exposed to corrosive atmosphere

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22
Q

Conductors which run above the top level of a window shall be permitted to be less than 1,000 mm but in no case shall be less than ____(mm).

A

300 mm

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23
Q

For barber shops and beauty parlors, the general lighting load per square meter of area shall be _____W

A

24 watts.

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24
Q

Liquidtight flexible non-metallic conduit shall be permitted to be used:

A

for direct burial, where flexibility is required, in exposed or concealed locations

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25
Q

Flexible metal conduits must NOT be used in :

A

wet locations, hoistways, and storage battery rooms.

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26
Q

For 25 to 50 A circuits, the minimum insulation resistance is (ohms) .

A

250,000 ohms

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27
Q

____C is the maximum operating temperature of type THWN conductor.

A

75C

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28
Q

is a conductor encircling a building and interconnecting all ground terminals.

A

Counterpoise

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29
Q

The conductor connecting the neutral point of the transformer or generator to the grounding impedance .

A

shall be permitted to be installed in a separate raceway

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30
Q

The total load on over-current device located in a panel board shall NOT exceed to ___% of its rating.

A

80%

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31
Q

For underground feeder and branch circuits, ____ of conductors shall be used.

A

UF type

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32
Q

an insulating element, generally of elongated form with transverse holes or slots for the purpose of insulating two sections of a guy or provide insulation between structure and anchor.

A

Guy insulator

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33
Q

__(A) is the ampacity of a 5.5 mm2 TW copper conductor.

A

30 A

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34
Q

A two wire DC system supplying premises wiring shall be grounded EXCEPT,

A system equipped with ground detector and supplying only industrial equipment in limited areas.
A system operating at 50 V or less between conductors.
A rectifier device DC system supplied from an AC system.
All of these

A

All of these

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35
Q

__________ – hazardous location in which ignitable concentrations of flammable gases or vapors can exist under normal operating conditions.
37. Switches are operated vertically rather than horizontally. The upward position of the handle shall mean switch-on position.

A

Class I, Division 1

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36
Q

The use of surface non-metal raceway is NOT permitted in all those mentioned below EXCEPT one. Which one is this?

Dry locations
Where subject to severe physical damage
Where the voltage is over 300 V
Where concealed

A

Dry locations

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37
Q

The branch circuit rating shall NOT be less than ____ of the non-continuous load.

A

100% of the non-continuous load.

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38
Q

For installation consisting of not more than two 2-wire branch circuits, the service disconnecting mains shall be rated NOT less than ___(A).

A

30 A

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39
Q

What is the lowest dielectric strength of transformer oil, which is acceptable to the PEC? (V)

A

Ans. 25,000 volts

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40
Q

Switches are operated vertically rather than horizontally. The upward position of the handle shall mean

A

switch-on position.

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41
Q

Wireways shall be supported at intervals NOT to exceed ________(mm).

A

1,500 mm

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42
Q

For a dwelling unit having a floor area NOT more than 50 square meters shall be permitted to have a single 20-A, 2-wire branch circuit provided the total load shall NOT exceed ______(VA)

A

3,680 VA

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43
Q

For show window lighting, a load of NOT less than ______(VA) shall be included for each liners meter of show window.

A

600 VA

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44
Q

The maximum setting of the ground fault protection of equipment shall be ______(A).

A

1,200 A

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45
Q

______ is a grounded metal enclosure containing a factory mounted, bare or insulated conductors, which are usually copper, or aluminum bars, rods or tubes.

A

Busway

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46
Q

Flat Conductor Cable (FCC) system shall NOT be used in the locations enumerated below EXCEPT one. Which one is this?

Locations where subject to corrosive vapors
Damp locations
Residential buildings
Outdoors

A

Damp locations

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47
Q

Type MI cables shall be securely supported at intervals NOT exceeding _____(mm).

A

1,800 mm

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48
Q

The grounding impedance for neutral system shall be installed between the _____________ and __________

A

the grounding electrode and system neutral.

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49
Q

In any watercraft, receptacle outlets operating at ___V or more ____________.

A

50 V

shall have a grounding pole

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50
Q

Space heating cables shall be secured at intervals NOT exceeding ______(mm).

A

200 mm

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51
Q

A run conduit between outlets, between fittings, between outlet and fitting shall NOT contain more than the equivalent of ___________ .

A

4 quarterbends

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52
Q

is a general term covering an assembly or assemblies of devices for the interruption, control and metering of electric power

A

Switchgear

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53
Q

Thermoplastic insulated fixture wires shall be _____ on the surface at intervals NOT exceeding ____.

A

durably marked

600 mm

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54
Q

The average distance between down conductors in a lightning protection system shall NOT exceed _____m

A

30 m

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55
Q

Type AC cable shall NOT be permitted to be used:

A

In storage battery
On cranes or hoists
In motion pictures

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56
Q

is a single conductor or multi-conductor assembly provided with or without an overall covering, primarily used for services.

A

Service entrance cable

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57
Q

Fixture wires shall NOT be smaller than _______ (mm2).

A

0.75 mm2

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58
Q

Standard ___________ shall NOT be used as a bond for the service entrance raceway.

A

locknuts and bushings

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59
Q

Transformers that contain liquid that will burn shall be installed only in approved vaults and shall also comply with the following conditions EXCEPT one. Which one is this?

Ample ventilation shall be provided for the continuous removal of flammable gases.
Vent openings shall lead to a safe location outside the building.
All vent ducts and openings shall be of sufficient areas to reliable explosion pressures within the vault.
There shall be robust door between the vault and any non-hazardous location.

A

There shall be robust door between the vault and any non-hazardous location.

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60
Q

Flat cable assemblies shall have conductors of ____ (mm2)special stranded copper wires.

A

5.5 mm2

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61
Q

is a short length of a conductor used to make a connection between terminals or around a break in a circuit.

A

Jumper

62
Q

The surface non-metallic raceway may NOT be used in the following locations EXCEPT one. Which one is this?

In dry locations
Where concealed
Where subject to severe physical damage
In hoistways

A

In dry locations

63
Q

For bare metal parts, busbars, etc of opposite polarity held free in air shall maintain a minimum spacing of ______(mm) for voltages rated NOT over _____v.

A

19 mm

250 V

64
Q

Type IGS cable is using a dry kraft paper tape and an SF6 gas. What do you mean by SF6?

A

Ans. Sulfur hexafluoride

65
Q

_____________ do NOT allow the installation of PVC rigid conduits

A

Hazardous locations

66
Q

Flat cable assemblies shall NOT be installed:

A

In hoistways
In any hazardous locations
Outdoors

67
Q

Ground connections shall be made at approximately every other steel column around the perimeter of the building and shall NOT be more than ______m.

A

18 m apart

68
Q

For school buildings, the general lighting load is ___________(VA/m2).

A

24 VA per square meters

69
Q

is fabricated assembly of insulated conductors in a flexible metallic enclosure

A

Type AC

70
Q

_____ and _____ in messenger wire shall be made by approved methods.

A

Splices and taps

71
Q

A storage battery supplying emergency lighting and power shall maintain NOT less than ____% of full voltage at total load for a period of at least ___ hours.

A
  1. 5%

1. 5

72
Q

is an appliance which can easily be moved from one place to another in normal use.

A

Portable appliance

73
Q

The feeder demand factor for three kitchen equipment other than dwelling kitchen equipment shall be ___% .

A

90%

74
Q

To provide for small appliance load in a dwelling unit, the feeder should be computed at _______w.

A

1,500 watts

75
Q

The nearest ground terminal shall be NOT less than _____ (mm) from the foundation wall

A

600 mm

76
Q

is the circuit conductors between the service entrance equipment or isolated generating plant and the branch circuit overload device or devices

A

Feeder

77
Q

Conductors shall be securely attached to the buildings using fasteners. Fasteners shall be spaced NOT more than ______(mm).

A

900 mm

78
Q

The minimum diameter of air terminal used at the top of a heavy duty smoke or vent stacks shall be ____(mm), exclusive of the corrosion protection.

A

15 mm

79
Q

_____ are used on conduits and are located inside and outside of the box. (April 2016)

A

Locknuts

80
Q

No parts of cord connected fixtures, hanging fixtures or pendants shall be located within a zone measured ______(mm) horizontally from a bathtub rim.

A

900 mm

81
Q

Busbars shall be copper having a minimum conductivity of ____.%

A

97%

82
Q

___C is the temperature rating of THW insulation.

A

75C

83
Q

Individual open conductors and cables other than service entrance cables shall NOT be installed within ________ (mm) of every grade level.

A

3,100 mm

84
Q

An insulated grounded conductor of _____(mm2) or smaller shall be identified by a continuous ____________ outlet finish along its entire length.

A

14 mm2

white or naturally gray

85
Q

Messenger supported wiring is permitted only in ______________ where maintenance personnel service the system.

A

industrial establishments

86
Q

In damp or wet locations, boxes and fittings should be properly placed or insulated to

A

prevent water from entering the box or fitting. (April 2016)

87
Q

Equipment having an open circuit voltage exceeding ____(V) shall NOT be installed in dwelling occupancies.

A

300 V

88
Q

Concealed knob and tube wiring conductors shall be rigidly supported on knobs NOT more than ______(mm) of minimum distance apart.

A

1,300 mm

89
Q

are used to support the conductor in the open wiring method

A

Split knobs

90
Q

The minimum size of type IGS cable shall be _____(mm2).

A

125 mm2

91
Q

Watercraft’s switchboards shall be provided with a clear working space of at least ______(mm) at the front.

A

1,000 mm

92
Q

For grounding electrode to which portable or mobile equipment system neutral impedance is connected, shall be isolated from the ground by at least _______(mm) from any other system or equipment grounding electrode.

A

6,000 mm

93
Q

______ metal is the best conductor of electricity.

A

Copper

94
Q

Incandescent lamp fixtures shall be marked to indicate the allowable wattage of lamps. The markings shall be permanently installed in letters at least _____(mm) high.

A

6.4 mm

95
Q

If the duty cycle of a motor-generator arc welder is 100%, the supply conductors shall NOT be less than ____% of its rated primary nameplate current.

A

100%

96
Q

Most wires used in residential house wiring are usually insulated by __________.

A

thermoplastic

97
Q

Open wiring on insulators shall be permitted for wiring systems of ______V or less.

A

600 V

98
Q

Stage equipment like footlights, border lights and others shall be so arranged that no branch circuit supplying such equipment will carry a load exceeding ____(A).

A

20 A

99
Q

Metal poles ___________ to be used to support _________ and ______________

A

shall be permitted
lighting fixture
enclosed supply conductors

100
Q

____________ raceway method is NOT allowed to be used in a hazardous location.

A

Rigid non-metallic conduit

101
Q

_________ of any pull box shall be removable.

A

1 or more sides

102
Q

Dimmers installed in ungrounded conductors shall be protected by OCPD NOT exceeding ____% of their rating.

A

125%

103
Q

Mobile home service equipment shall be rated NOT less than _____(A).

A

100 A

104
Q

The branch circuit conductors that supply one or more units of data processing systems shall have an ampacity NOT less than _____ %of the total connected load.

A

125%

105
Q

______ – locations which are hazardous because of the presence of easily ignitable fibers of flyings.

A

Class III

106
Q

Where nails or screws are used to mount knobs, they shall be of a length sufficient to penetrate the wood to a depth equal to at least ______ the height of the knob.

A

1/2

107
Q

Explosion hazards exist due to the presence of the following material EXCEPT one. Which one is this?

Combustible dust
Flammable vapors
Flammable liquids
Carbon dioxide gas

A

Carbon dioxide gas

108
Q

Metal clad cables shall be supported and secured at intervals NOT exceeding ________(mm).

A

1,800 mm

109
Q

The ampacities of type UF (underground feeder) cable shall be that of the _____C conductors.

A

60C

110
Q

Some of the principal factors that affect the operating temperature of a cable are the following EXCEPT one. Which one is this?

Voltage
Ambient temperature
Ventilation
Load current

A

Ventilation

111
Q

Communication wires and cables shall have a voltage rating of NOT less than _____V.

A

300 V

112
Q

Self-excited generators supplying power to organs shall have a potential of NOT more than ____V.

A

15 V

113
Q

_____C is the temperature rating of THHN insulation.

A

90C

114
Q

All ___________ and ______________ with autotransformer starting shall have an over-current protective device using inverse time circuit breaker with a maximum setting of _____% of its full load current rating.

A

AC squirrel cage motors
synchronous motors
200%

115
Q

Rosettes for use with conduit boxes or raceway shall have bases high enough to keep wire and terminals at least ______(mm) from the surface wired over.

A

10 mm

116
Q

No motor circuit in any watercraft shall have conductors less than ______.(mm2)

A

2.0 mm2

117
Q

Sizes of building wires manufactured in the Philippines are standardized in square millimeters. What is the area of copper conductor, which is next larger than 8 mm2?

A

Ans. 14 mm2

118
Q

Flexible cords or data processing cables used to connect computer units ___________ as part of the system.

A

shall be approved

119
Q

Branch circuits to receptacles under raised floors in computer rooms shall be wired with:

EMT, IMC, and AC cable.

A

EMT, IMC, and AC cable.

120
Q

As to the general rule, floating buildings shall be supplied by ____ of feeder conductors from their service equipment.

A

1 set

121
Q

Which of the following electric wires has the highest ampacity?

(5.5 mm2, 8.0 mm2, 30 mm2, 50 mm2)

A

50 mm2

122
Q

Indoor antennas and indoor lead-in conductors shall NOT be run nearer than _____ (mm) to conductors of other wiring systems in the premises.

A

50 mm

123
Q

The ampacity of the neutral conductor of a dual voltage feeder shall be ____ of the ampacity of the ____________

A

100%

ungrounded conductors.

124
Q

According to the PEC, the minimum insulation level for neutral conductors of residential installations, which have solidly grounded system, shall NOT be less than _____V.

A

300 V

125
Q

Exit lights on watercrafts shall be provided at each point. The word “EXIT” shall be red letters NOT less than _____(mm) high.

A

50 mm

126
Q

The nominal voltage used in elevator, dumbwaiter, escalator and moving walk driving machine motors, machine brakes and motor-generator sets shall NOT exceed_______V.

A

600 V

127
Q

is a cable made-up of electric conductors which provides electrical connection between an elevator or dumbwaiter car and fixed outlet in the hoistway.

A

Traveling cable

128
Q

is the minimum weight of a fixture that requires a support that is independent of the outlet box.

A

23 kg

129
Q

For single phase AC or DC motors supplied by a two wire, single phase AC or DC with one conductor grounded. How many overload units shall be required?

A

Ans. (1) in the ungrounded conductor (April 2016)

130
Q

is the insulation resistance acceptable by the PEC for 600-V circuits consisting of 2.0 mm2 conductor.

A

500,000 ohms

131
Q

Each patient bed location shall be provided with a minimum of _________

A

4 receptacles.

132
Q

Open conductors on insulators shall be separated at least ______ from metal raceways, piping or other conducting materials.

A

50 mm

133
Q

The nominal gas pressure used in type IGS cable shall be ______ Kpa.

A

138 kPa

134
Q

___(mm) is the smallest size of EMT (electrical metallic tubing). (April 2016)

A

15 mm

135
Q

The use of non-metallic raceway shall be permitted in _____________.

A

dry locations only

136
Q

Metal clad cables shall be permitted for installations in the following locations EXCEPT one. Which one is this? (April 2016)

Signal circuits
Branch circuits
Direct burial in the earth
Aerial cable

A

Direct burial in the earth

137
Q

One set of service entrance conductors shall be permitted to supply more than ____ of service equipment.

A

1 set

138
Q

__________________ is known in the field as PVC.

A

Rigid non-metallic conduit

139
Q

Concealed knob and tube wiring shall be supported within _____(mm) of each side of each tap or splice.

A

150 mm

140
Q

A 15-A or a 20-A branch circuit shall be permitted to supply lighting units and other utilization devices. The rating of any one cord and plug connected appliance shall NOT exceed ____ % of the branch circuit rating.

A

80%

141
Q

Receptacles located on stages in theaters shall NOT exceed ____% of their ratings for continuous duty loads.

A

80%

142
Q

Lighting fixtures exposed to cleansing water in agricultural buildings shall be _________.

A

watertight

143
Q

is a metal raceway of circular cross section with integral or associated couplings, connectors and fittings approved for the installation of electrical conductors.

A

Intermediate metal conduit

144
Q

Rigid metal conduit and intermediate metal conduit when used underground shall have a minimum burial of _____.

A

150 mm

145
Q

Storage batteries used, as source of power for emergency system shall maintain a voltage applied to the load without falling below _____ % of normal value.

A

87.5%

146
Q

Driven rods maybe used as a grounding electrode provided the driven depth shall NOT be less than ________(mm).

A

2,450 mm

147
Q

is an enclosed channel designed expressly for holding wires, cables or busbars with additional functions as permitted

A

Raceway

148
Q

The bonding conductor used in agricultural buildings shall be copper, insulated, covered or bare, NOT smaller than ________(mm2)`.

A

8.0mm2

149
Q

In any watercraft, the motor circuit shall have an ampacity of NOT less than ___% of the motor’s full load current rating

A

100%

150
Q

is an enclosed channel designed expressly for holding wires, cables or busbars with additional functions as permitted.

A

Raceway

151
Q

.

A

.

PEC (19 decks)

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