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Flashcards in PEC 3 Deck (151):
1

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

8.0mm2

2

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

100%

3

The largest size of electrical metallic tubing is _____(mm).

100 mm

4

The overload relay used to protect each motor-compressor set shall be selected to trip at NOT more than ______% of the motor-compressor rated load current.

140%

5

Lamp protection shall be provided by elevation of at least ___(m) from the normal working surface

2 m

6

Type UF cable shall NOT be used as ____________.

service entrance

7

Where ____ pulls are made on the pull box, the distance between each raceway entry inside the box and the opposite wall of the box shall NOT be less than _____ the trade diameter of the largest raceway in a row.

“U”
6 times

8

Reference ambient temperature for explosion proof electrical equipment shall be ___C

50C

9

is a process wherein coalescence is produced by heating with an electric arc with or without the application of pressure and with or without the use of filler metal.

Arc welding

10

The use of underground feeder cables may NOT be used in the following conditions EXCEPT one. Which one is this?

Embedded in concrete
Hazardous location
Direct burial
Theaters

Direct burial

11

Faceplates of insulating materials shall be non-combustible and NOT less than _____(mm) in thickness.

2.5 mm

12

Conductors supplying _____ motors shall have an ampacity equal to the sum of the FLA rating of all motors plus ____% of the highest motor FLA in the group.

two or more
25%

13

____ color identifies the grounded conductor of a branch circuit.

White

14

_______ is an enclosure of porcelain or other insulating material, fitting with terminals and intended for connecting the flexible cord carrying a pendant to the permanent wiring.

Rosette

15

Receptacles installed for the attachment of portable cords shall be rated at NOT less than (2) .

15 A, 250 V

16

Motors with a marked service factor of less than 1.15 shall have an overload protection equal to ___% of the motor’s FLA.

115%

17

Cables and cords supplied through plugging boxes shall be of _____.

copper

18

Which of the following statements is NOT correct?

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

Over-current devices may be located inside clothes closets.

19

A conductor or group of conductors, in switchgear assemblies which serves as a common connection for two or more circuits

Ans. Bus

20

The ampacity of capacitor circuit conductors shall NOT be less than ____% of the rated current of the capacitor.

135%

21

The alternate or back-up source of power in a hospital shall have a capacity to sustain its connected loads for a minimum of ___ hours

1.5

22

The load for the required branch circuit installed for the supply of exterior signs or outline lighting shall be computed at a minimum of ______(VA)

1,200 VA.

23

The usual function of a disconnect switches in high voltage circuits is _________________________

to isolate from energized buses, equipment which are not in service.

24

Pendant conductors where not cabled and longer than ______(mm) length shall be twisted.

900 mm

25

The ampacity of the phase conductors from the generator terminals to the first over-current device shall NOT be less than ____% of the nameplate current rating of the generator.

115%

26

What is the maximum number of conductors permitted in a wireway at any cross-section, signal circuit or starter-control wires are not included?

(30 conductors, 50 conductors, 40 conductors, 25 conductors)

30 conductors

27

Each motor shall be provided with only _ disconnect.

1

28

Energized parts of a generator operated at more than ___V to ground shall NOT be _______ to accidental contact where _______ to ___________.

50 V
exposed
accessible
unqualified persons

29

A hoisting and lowering mechanism equipped with a car or platform which moves in guides in a substantially vertical direction and which serves two or more floors of a building or structure.

Ans. Elevator

30

is an assembly of a flexible cord with an attachment plug on one end and a cord connector on the other

Extension cord

31

Any box NOT over ______cm3 in size, intended for mounting in closed building construction shall be affixed with _____ or _______ as to provide a rigid and secure installation.

1,640 cm3
anchors, clamps

32

In battery rooms with alkaline batteries, the shelves shall be lined with steel sheet NOT less than ____(mm) thick.

75 mm

33

__________ is a disruptive discharge around or over the surface of a solid or liquid insulator.

Flashover

34

Emergency lighting of __ lux shall be provided in exit paths from all areas of attended stations.

10

35

An overheated cord often indicates__________ and _________.

corroded terminals
defective cord

36

___________ grounding conductors shall NOT be smaller than ______(mm2) copper.

Individual arrester
14 mm2

37

is a generic term for an artificial source of light.

Lamp

38

Cable bus shall be securely supported at intervals NOT exceeding ______(mm).

3,600 mm

39

Snap switches used with open wiring on insulators shall be mounted on insulating material that separates the conductors at least _____ (mm) from the surface wired over.

13 mm

40

The usual nameplate data on DC motors include the following EXCEPT one. Which one is this?

Manufacturer’s name
Rated frequency
Rated voltage
Rated speed

Rated frequency

41

Vertical runs of wireways shall be securely supported at intervals NOT exceeding _______(mm)

4,500 mm

42

Size 0.75 mm2 fixture wire has an ampacity of __(A).

6 A

43

Type MI cable shall NOT be used where .

exposed to destructive corrosive conditions

44

Each receptacle for DC plugging boxes shall be rated at NOT less than ____(A).

30 A

45

Insulated ground conductor of 14 mm2 or smaller shall be identified by a continuous white outer finish along its entire length or another color which is ________.

natural gray

46

Metal covers for boxes shall be _____ with firmly attached ____________ NOT less than ____(mm)

lined
insulating material
0.80 mm

47

Electrical non-metallic tubing shall NOT be used where the voltage is over _____V.

600 V

48

The system neutral conductor shall NOT be connected to ground EXCEPT

When the generator frame is not grounded
Through the grounding impedance
Through a grounding transformer
When a ground fault is very common

Through the grounding impedance

49

When thermal overload relay are used for the protection of a three-phase induction motor, their primary purpose is to protect the motor in case of ___________.

sustained overload

50

In type AC cable, all bends shall be made so that the cable will not be damage and the radius of the curve of the inner edge of any bend shall NOT be less than _ times the diameter.

5

51

Non-metallic sheathed cable shall be supported within ______(mm) from every cabinet, box or fitting.

300 mm

52

is the nominal supply voltage specified by the PEC for residential homes.

230 VAC

53

__________ wiring shall NOT be used in hoistways.

Messenger supported

54

Temporary electrical power and lighting installations shall be permitted for a period NOT to exceed _____ for Christmas decorative lighting, carnivals and similar purposes.

90 days

55

_____ conductors is NOT applicable on wet locations.

Type THHN

56

is a surge of unidirectional polarity.

Impulse

57

For each small appliance branch circuit, the feeder load shall be _______VA per ___A circuit.

1,500 VA
20 A

58

The electrical plans for residential house include the following items EXCEPT one. Which one is this?

Substation plan
Location plan
Floor plan showing location of service
Layout of wiring plan for general lighting and receptacle outlets

Substation plan

59

Tools and portable hand lamps likely to be used in wet and conductive locations shall NOT be required to be grounded where supplied through an isolating transformer with an ungrounded secondary of NOT more than ___V.

50 V

60

The minimum size of branch circuit capacity to supply laundry receptacle outlets shall be ___A.

20 A

61

Conductors in open wiring on insulators shall be rigidly supported within ____(mm) from a tap or splice.

150 mm

62

Main and equipment bonding jumper shall of _______

copper.

63

The minimum insulation level for neutral conductors of solidly grounded system shall be ____V.

600 V

64

For class II lighting materials, the minimum diameter of a solid copper air terminal shall be _____(mm).

12.7 mm

65

____________ between conductive or inductive metal object in an element of a lightning protection system to accomplish electrical continuity.

Bonding connection

66

The grounding electrode conductor shall be: (3)

copper, copper-clad-aluminum, and aluminum.

67

Mats of insulating rubber or other suitable floor insulation shall be provided for the operator where the voltage to ground exceeds ____V.

150 V

68

_ or more 20-A branch circuit shall be provided for all receptacle outlets for the small appliance load.

1

69

For a one family dwelling unit having an initial load of 10 kVA or more, the minimum service entrance capacity shall be ____(A).

60 A

70

Flexible cords used in locations where there is a lot of flying flint or fibers shall comply with the following EXCEPT one. Which one is this?

It shall be approved for use in locations which are vapor-filled.
It shall contain in addition to the conductors, a grounding conductor.
It shall be of type approved for extra hard usage.
It shall be provided with suitable seal to prevent the entrance of dust.

It shall be of type approved for extra hard usage.

71

_______ is a point at which the load of a given area is assumed to be concentrated.

Load center

72

The workspace about electrical equipment shall be adequate to permit at least ______ opening of doors or hinged panels.

90 degrees

73

The multiplying factor for determining the size of branch circuit protection for non-time delay fuse is ____%.

300%

74

For banks, the general lighting load shall be computed at ___ per square meters of the floor area.

28

75

In dwelling units, the computed lighting and small appliance load above 120,000 VA shall be computed at what demand? (%)

Ans. 25%

76

Which of the following statements is NOT one of the primary objective of the PEC?

To establish electrical work standards
To establish basic material qualities
To ensure safety in using electricity
None of these

None of these

77

The code has been approved and adopted by the Board, PRC. What does the acronym PRC stands for?

Ans. Professional Regulation Commission

78

________ are sheet metal troughs with hinged or removable covers for housing and protecting electric wires and cables and which conductors are laid in place after this object has been installed as a complete system.

Wireways

79

Portable appliances equipped with proper cord and plug caps and NOT more than _______(VA) maybe installed without an electrical permit.

1,200 VA

80

Which of the following is not a standard content of an electrical plan?

Location plan
Legend and general notes
Schedule of maintenance
Specifications

Schedule of maintenance

81

When installing cables or raceway type wiring method parallel to the framing members such as joists, rafters or studs, the cable or raceway shall be _______ and _______ so that the nearest outside surface of the cable or raceway is NOT less than ___(mm) of distance from the nearest edge of the framing member.

installed, supported
50 mm

82

Which of the following is NOT a standard ampere rating of a fuse?

(60 A, 125 A, 45 A, 55 A)

55 A

83

Cabinet and cutout boxes shall have an air space of at least _____(mm) between any energized metal parts of enclosed fuses and the door.

25 mm

84

Auxiliary gutter shall be supported throughout its entire length at intervals ________(mm).

1, 500 mm

85

A lighting and appliance branch circuit panelboard is one having more than ____% of its over-current device rated ____(A) or less.

10%
30-A

86

Open wiring on insulators shall be permitted on systems of up to _____(V)

600 V.

87

Conductors in concealed knob and tubing wiring shall maintain a clearance of NOT less
than ____(mm) between conductors.

76 mm

88

The minimum size of wire used in electrical wiring is the former #14 AWG. Under the
metric system shown in the PEC, the diameter is ____(mm).

1.6mm

89

Non-metallic sheathed cable shall be secured in place at intervals NOT exceeding ______(mm)

1,300mm.

90

Motor A has a full load current of 8-A and motor B 10-A. What is the ampacity of the
feeder conductor supplying these two motors?

Ans. 20.5 A


F e e d e r am p a c ity = S um o f m o to rs ' F LA + 2 5% o f la rg e s t m o to r F LA
= 8 + 1 0 + 0 .2 5 1 0
= 2 0 .5 A

91

The bending radius of type SNM cable shall NOT be less than _ times the diameter of the cable

5

92

Flexible metallic tubing shall NOT be used in lengths longer than ______(mm)

1,800 mm

93

Size 1.25 mm2 fixture wire has an ampacity of _ A.

8

94

Each transformer up to 600 V nominal shall be ________ by an __________ device on the primary side at NOT more than ______% of the rated primary current of the transformer

protected
individual over -current
125%

95

Outdoor lighting fixtures and associated equipment ____ permitted to be supported by
trees.

shall be

96

Rosettes shall be rated at 660 W, 250 V with a maximum current rating of __.A

6 A

97

Heating cables shall be furnished complete with factory assembled non-heating leads at
least _______(mm) in length.

2,100 mm

98

Conductors supplying one or more motor -compressors with or without additional loads shall have an ampacity NOT less than the sum of the rated load plus ___% of the highest motor-compressor rating in the group.

25%

99

Conductors supplying _______ motor -compressors with or without additional loads shall have an ampacity NOT less than the sum of the rated load plus ___ of the highest motor-compressor rating in the group.

one or more
25%

100

Capacitors containing more than_____ of flammable liquid shall be encased in vaults or outdoor fenced enclosures.

11 liters

101

. Wiring methods/materials allowed by the Code for gasoline stations include all the following EXCEPT on. Which one is this?

Type MI cable with approved terminal fitting
Threaded steel intermediate conduit
Rigid non-metallic conduit
Threaded rigid metal conduit

Rigid non-metallic conduit

102

A main bonding jumper shall be a: (3)

bus, screw, or wire

103

What does the symbol consisting of rectangle with solid shading indicate?

Ans. Lighting panelboard

104

The ampacity of conductors supplying therapeutic equipment shall NOT be less than _____% of the current rating of the equipment.

100%

105

For 800 A circuits, the minimum insulation resistance shall be _____ ohms.

5,000

106

Branch circuits shall be classified according to the maximum permitted __________

ampere rating

107

Medium voltage cable shall be permitted for installation on the following EXCEPT one. Which one is this?

Where installed in cable trays
Where exposed to direct sunlight
Power systems up to 35,000 volts in dry locations
Power systems up to 35,000 volts in wet locations

Where exposed to direct sunlight

108

Each ___________ up to ______V shall be protected by an individual over-current device rated NOT more than ____% of its rated full load current.

autotransformer
600 V
125%

109

Each of the three 3.5 mm2 TW copper conductors are in a conduit has an ampacity of 20 A. If there will be six of them in the conduit, what will be the ampacity of each conductor?

Ans. 16 A

New ampacity = Ampacity x Derating of six wires = 20 x 80% = 16 A

110

Branch circuit conductors supplying a single motor-compressor shall have an ampacity NOT less than ____% of either the motor-compressor rated load or the branch circuit selection current, whichever is larger.

125%

111

___A is required to supply a fixed lighting load of 21.5 A used at continuous duty.

30 A

Ampacity = 125% of load current = (1.25)(21.5) = 26.875, use a 30-A branch circuit

112

Potential transformers installed indoors or enclosed shall be protected with __________

primary fuses.

113

Which of the following is NOT a standard size of disconnect?

(30 A, 60 A, 50 A, 100 A)

50 A

114

A disconnecting means shall be provided in each ungrounded conductor for each capacitor bank and shall NOT be less than _____% of the rated current of the capacitor.

135%

115

If a 460-V switchboard has exposed parts on one side and grounded parts or concrete on the opposite side, what working clearance between the two sides is permitted by the Code?

Ans. 1,100 mm

116

Cells in rubber or composition containers shall require no additional insulating supports where the total nominal voltage of all cells in series does NOT exceed ____ level of voltage.

150 V

117

___ is the maximum load of a 15-A circuit breaker protecting a branch circuit that supplies a continuous load.

12 A

Load = 80% of rating = (0.8)(15) = 12 A

118

Aircraft energizers shall be so designed and mounted that all electric equipment and fixed wiring shall be at least ______(mm) above floor level.

460 mm

119

Each patient bed location where in patient care is provided shall be supplied by at least __branch circuits

2

120

Generators compartments shall be lined with galvanized steel, NOT less than _____(mm) thick.

0.40 mm

121

For a rigid steel conduit of trade diameter 50 mm, the field bend shall be so made that the radius of the inner edge shall NOT be less than ______(mm) of radius for conductors without lead sheathed.

300 mm

122

For all deck or floor plans, the standard scale to be used is

1:100.

123

In locations where flammable anesthetics are employed, the entire area shall be considered hazardous location which shall extend upward to a level ________(mm) above the floor.

1,500 mm

124

As a rule, branch circuits shall NOT be supplied by an ________.

autotransformer

125

is a multi-contact switch, which fixes the operation sequence of the major device during starting and stopping or during other sequential switching operations.

Motor operation sequence switch

126

Circuits from portable switchboards directly supplying equipment containing incandescent lamps of NOT ove 300-W shall be protected by over-current device having a setting of ___(A).

20 A

127

The Electrical Code requires that electrical plans and drawings shall be drawn on sheets of the following standard size. Which one is NOT considered standard?

600 mm x 900 mm
217 mm x 279 mm
760 mm x 1000 mm
500 mm x 760 mm

217 mm x 279 mm

128

is a disruptive discharge between electrodes of a measuring gap.

Sparkover

129

The chassis-grounding terminal of the battery shall be bonded to the vehicle chassis with a copper conductor of ______(mm) size or its equivalent.

8.0 mm2

130

The length of the cord from the face of the attachment plug cap to the point where the cord enters the mobile home shall NOT be less than ____.

6 m

131

Non-metallic sheathed cables shall be supported within ______(mm) of a non-metallic outlet box without cable clamps.

200 mm

132

A test lamp using an ordinary bulb is used to test the _____________.

ground check

133

Air conditioning load has a demand load of ___%.

100

134

_ sets of the complete electrical plans and specifications _____ and ______ by a ____ shall be submitted, as one of the requirements in filling for an electrical permit.

5
signed, sealed
PEE

135

If there will be six or more 2-wire branch circuits for a one family dwelling unit, the minimum service entrance capacity shall be _____(A)

100 A

136

_______ is a unit of an electrical system which is intended to carry but not utilize electric energy

Device

137

Service entrance cables shall be supported at intervals NOT exceeding ________(mm).

760 mm

138

is an over-current device with a circuit opening fusible part that is heated severed by the passage of over-current through it.

Fuse

139

___A is the maximum size of lighting load that can be connected to a 20-A single phase branch circuit supplying a fixed appliance load of 7-A.

10 A

Note: The additional load shall NOT exceed 50% of the branch circuit rating. Thus, load = (0.50)(20) = 10 A

140

If an electrician does not understand the instruction that were given by the supervisor, which of the following is the best for him to do?

He asks that the instruction be repeated and clarified
He does the job the way he thinks best
He works out the solution to the problem himself
He gets one of the other electricians to do the job

He asks that the instruction be repeated and clarified

141

The branch circuit load for drying equipment is the larger of either the ______________ or ______(VA)

VA rating of the nameplate
5,000 VA.

142

For hallways of _______(mm) or more in length, at least one receptacle outlet shall be installed.

3,000 mm

143

The minimum headroom of working space about service equipment, switchboards, panelboards, etc. shall be ______(mm).

1,900 mm

144

The equipment-grounding conductor of a branch circuit shall be identified by a continuous _______ color.

green

145

is the sum of the continuous ratings of the load consuming apparatus connected to the system or any part thereof.

Connected load

146

An outlet box should be fastened to a concrete wall by the use of ___________.

expansion bolts

147

A ____ branch circuit shall be permitted to supply fixed lighting units with heavy-duty lampholders.

30 A

148

In every ___________ (7) or similar rooms or area of dwelling units, receptacle outlets shall be installed so that no point along the floor line in any wall space is more than _______(mm) measured horizontally from an outlet in that space.

kitchen, family room, dining room, living room, parlor, library, bedroom

1,800 mm

149

The path to ground from circuits equipment and metal enclosures for conductors shall: (3)

Have capacity to conduct safely any fault current
Have sufficiently low impedance
Be permanent and continuous

150

Cable trays shall NOT be used in hoistways.

Cable trays shall NOT be used in hoistways.

151

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