PEC
問題一覧
1
The PEC 2017 edition, is approved by board resolution No. ___
18
2
In the preparation of Philippine electrical code (P.E.C) 2009 part one, the national electrical code (N.E.C) ___ was used as the main reference
2005
3
___ are used to provide explanatory material, references to other sections, precautions to be observed, and further mandatory requirements.
Fine print notes
4
What hermetic motor what rule is the disconnecting means is 115% of the full load current
Wiring design rule
5
Which is NOT the basic rule of PEC 2009?
Construction rule
6
Bacon washing areas are considered as ___ location
wet
7
What is the minimum of size of grounding electrode copper conduct ?
8.0 mm²
8
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
9
Where multiple ride, pipe or plate electrodes are installed to meet the requirement of the PEC, they should not be less than ___ mm apart
1800
10
The PEC has assigned a color ___ to the high-leg of a 4-wire Delta connected secondary
Orange
11
what is the advantage of PVC over polyethylene ?
Flame retardant
12
what is the maximum number of disconnect for service means given by PEC ?
6
13
As a general rule for conductors in parallel, aluminum, copper-clad aluminum, or copper
conductors of size mm? and larger, comprising each phase, neutral or grounded circuit conductor, shall be permitted to be connected in parallel (electrically joined at both ends to form a single conductor).
50
14
What is the required Volt-Amp for lighting of an office building with 500 m² area?
14,000
15
What is the brand circuit demand for two-14 kW range in a residence of 1-phase, 230 Volt?
12.1 kW
16
Calculate total load for a 1-phase. 230 Volt branch circuit supplying two-3kW and two-4kW wall-mounted oven.
42.2 Amp
17
What is the neutral load for a 1ф system having 150 Amp of electric-discharge lighting and 250 Amp of incandescent lighting?
385 Amp
18
What is the maximum current allowed on a # 12 AWG (3.5 sq.mm) THHN copper-conductor in an ambient temperature of 122° (50°C) with a total of six (6) current-carrying conductors in the conduit? (use: Derating factor of 80% for 6 conductors and correction factor of 0.82 at 50°C)
19.68 Amp
19
What is the minimum of the ampacity of feeders with motor and other load connected ?
125% motor FL current plus ohter current
20
A hermetic motor-compressor has 25 Amp full load current. What is the rating of disconnecting means?
28.75 Amp
21
Three squirrel-cage induction motors rated as follows: 25 HP, 34 Amp full load, 20 Hp,
27 Amp full-load, and 10 Hp, 14 Amp full-load all rated at 460 volts, 3ф, 60 Hz are to be served by a feeder circuit for an ambient temperature of 30°C. What is the net computed current for feeder conductors and using non-time delay (NTD) fuse, what is the largest protective device for feeder circuit protection?
83.5 Amp & 141 Amp resp.
22
generator has a nameplate rating of 30 Amp, what is the minimum ampacity of conductor from generator for terminals the first overcurrent device?
34.5 Amp
23
A 3$. 225 kVA, 4. 16 KVI480 Volt: Dower transformer having 2.3% impedance. For supervised location, what size of fuses are realisdio protect the transformer primary?
And what size of circuit breaker is required to protect transformer secondary?
90 Amp & 600 Amp resp.
24
The ampacity of a capacitor circuit conductors shall be less than ___ percent of the rated current of the capacitor
135
25
One solar photovoltaic system; ampacity of conductors and overcurrent devices shall not
be less than ___ percent of the computed current.
125
26
PEC requires that the resistance at ground of a single electrode consisting of rod, pipe or plate shall be ___
25 ohms or less
27
What size of grounding conductor required for a circuit protected by 30 Amp circuit breaker?
2.0 sq. mm
28
What is the minimum size copper banding jumper for a service raceway containing 100 mm? THHN aluminum conductors?
22 mm²
29
is a device intended to open the circuit when it detects the current waveform characteristic that are unique to arcing fault.
AFCI
30
The maximum number of overcurrent devices that may be installed in a lighting panel is:
48
31
What is the purpose of PEC 2009?
Safeguarding of person in property
32
2. A piece of electrical equipment that is designed to operate at alternate intervals of (1)
load and no load; or (2) load and rest; or (3) load, no load rest is called ____ duty.
Intermittent
33
For dwelling units, factor for the first 3000 Volt-ampere upload is ____
100%
34
Is single-family dwelling unit having a floor area of 45 m² has a total connected load of 2575 VA. What is the minimum size service entrance conductor?
3.5 mm²
35
Additional feeders or branch circuit show me permitted where is the capacity requirements are in excess of ___ Amp at the supply voltage of __ volts or less.
2000, 600
36
What is the current-carrying capacity of each of the three copper bus-bars? The cross-sectional area of each is 1.30 cm × 2.55 cm, if each bus-bar were replaced by aluminum, what is the corresponding current-carrying capacity?
514 Amp & 361 Amp
37
For service-entrance phase conductors larger than 500 mm? copper or 800 mm?
aluminum, the required grounded conductor for the service shall be sized not less than ____
percent of the area of the largest service -entrance phase conductor.
12 1/2
38
Which of the following is a standard rating of fixed-trip inverse time CB?
50
39
All switches and circuit breakers used as switches shall be so installed that the center of the grip of the operating handle when in its highest position shall NOT be more than ____
mm above the floor or working platform.
2000
40
What is the demand factor for a single 8 kW household electric range
80%
41
every circuit breaker having an interrupting rating other than ___, shall have its interrupting rating shown on the breaker itself
5000 Amp
42
Lamp holders installed over highly combustible material shall be of the ___ type
Unswitched
43
The main purpose of bonding jumper is to connect equipment grounding conductors and ___ to the grounded conductor of the system.
Service disconnect enclosure
44
What is the maximum allowable distance interval between support securing busways?
1,500 mm
45
A 3-way and 4-way switches shall be so wired that all switching is done in the ___ conductor
Ungrounded
46
What is the minimum size of grounding rod ?
2.0 sq. mm
47
Which is the safest type of insulation for in the wiring installation especially residential and commercial buildings ?
Polyvinyl chloride
48
What is the maximum bend of rigid metallic conduit (RMC)
4 quarter
49
Sign and outline lighting outlets shall be computed at a minimum of __ VA for each required branch circuit
1200
50
Ate hermetic motor compressor has a rated load current of 20 Amp. What is the allowable ampacity of branch circuit conductor?
40 Amp
51
what is the minimum ampacity a conductor for room air conditioner with 12 Amp rated current?
15 Amp
52
According to Philippine Electrical Code, at ambient temperature of 30°C, 8.0 mm? copper conductors with the following insulation have the following ampacities: TW insulation= 30
Amp; THW insulation= 45 Amp; THHN insulation= 50 Amp. If each of these insulated wires carry the same 40 Amp, which will generate heat the fastest?
TW insulated wire
53
Codename for polyethylene insulation or PVC 75°C ?
THW
54
short circuit temperature rating of PVC insulated building wires for 30 seconds period.
150°C
55
Before installation of power cables, the basic DC test voltage in ascending more according to ICEA (insulated cable engineer association) specifications for 100% insulation level in terms of rated voltage is not about?
Five times
56
common cause of failure in termination of cable is ____
improper insulation in penciling
57
What is the normal bending radius from either edge of conduit with relation to diameter
8-9 times
58
Short circuit temperature of polyethylene cable in degree centigrade is
200
59
What is the meaning of distance receptacle outlet official window in meters ?
4
60
Receptacle outlet shall be located not more than ___ mm above countertop
450
61
Branch circuit larger than ____ Amp shall supply on then lighting outlet load.
50
62
What is the distance from the flooring to the receptacle outlet in dwelling unit in mm?
1800
63
In dwelling units, at least one wall receptacle outlet shall be installed within ___ mm of the outside edge of basin or bath tub.
900 mm
64
in dwelling units, at least one receptacle outlet for hallways more than __ meter.
3
65
The lighting load for a dwelling unit expressed in terms of volt-ampere per sq. meter must be atleast ____.
28
66
The lighting load for an office expressed in terms of volt-ampere per square meter must be at least __
28
67
What is the branch circuit demand for 12kW range and a 5 kW cooped up in a residence of 230 V, 1-phase?
11 kW
68
Feeder supply several motor load shall have an ampacity equal to the sum of the full load current rating of all the motors plus __ percent of the highest rated current in the group.
25
69
A 3phase motor draws 50 amp is at full load. What shall be the maximum inverse time circuit breaker that may be used for short circuit protection?
100 Amp
70
Branch circuit conductor to one or more units of a data processing system shall have an ampacity of ___ % of the total connect a load
125%
71
Conductors __ and larger shall be stranded when installed in raceways.
8.0 mm²
72
there is a dual voltage of a capacitor shall be reduced to ___ Volts, nominal, or less with _____ minutes after the capacitor is disconnected from the source of supply.
50,1
73
Equipment for hazardous location shall be approved for the following property
Durability
74
What is the minimum ampacity of supply feeder for a window type air-conditioning unit with 8 Amp rated load current with other load supplied?
20 Amp
75
The primary winding of a step down transformer shall be protected on the primary side by an overcurrent device rated, NOT more than a certain percentage of the primary current. What is this percentage?
125%
76
Where transformer vault is to be constructed with other buildings below it, the minimum requirement for fire resistance rating is ___ hours.
3
77
Ferro resonance is destructive phenomenon associated with?
1/5 sq.mts
78
A grounding in encircling the building or structure in direct contact with the Earth, consisting of at least 6000 mm of bare copper conductor not smaller than __ millimeters squared
30
79
Grounding shall NOT be connected to ___
Soldered fittings
80
The concrete encased electrode consisting at least ___ mm zinc galvanized coated steel reinforced or either electrically conductive or rods not less than ___ mm diameter
6000 mm, 13 mm dia.
81
Self-contained device that automatically opens an electric circuit call mom on speaker overload without getting damage is :
Molted circuit breaker
82
Expansion joints and telescoping section of raceways shall be made electrically continuous the equipment ____ or other means approved for the purpose
Bonding jumper's
83
Which off the following is not accepted as if they have the same meaning
Low-voltage
84
What is called an electrically operated switch rated in Ambris but also provide overload protection for motors ?
Magnetic starter
85
Code of ethics is resolution No. ___ series of 1995
22
86
Which of the following establishes ethical behavior among professionals?
Hippocratic oath
87
Sec.7, Article III, R.A 7920: an electrical engineer shall ___ , vilify, or destroy the good name and reputation of others.
Malign
88
Integral part of contract requirement which support technical engineering requirements which are not shown completely on drawing.
Specifications
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65問 • 1年前問題一覧
1
The PEC 2017 edition, is approved by board resolution No. ___
18
2
In the preparation of Philippine electrical code (P.E.C) 2009 part one, the national electrical code (N.E.C) ___ was used as the main reference
2005
3
___ are used to provide explanatory material, references to other sections, precautions to be observed, and further mandatory requirements.
Fine print notes
4
What hermetic motor what rule is the disconnecting means is 115% of the full load current
Wiring design rule
5
Which is NOT the basic rule of PEC 2009?
Construction rule
6
Bacon washing areas are considered as ___ location
wet
7
What is the minimum of size of grounding electrode copper conduct ?
8.0 mm²
8
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
9
Where multiple ride, pipe or plate electrodes are installed to meet the requirement of the PEC, they should not be less than ___ mm apart
1800
10
The PEC has assigned a color ___ to the high-leg of a 4-wire Delta connected secondary
Orange
11
what is the advantage of PVC over polyethylene ?
Flame retardant
12
what is the maximum number of disconnect for service means given by PEC ?
6
13
As a general rule for conductors in parallel, aluminum, copper-clad aluminum, or copper
conductors of size mm? and larger, comprising each phase, neutral or grounded circuit conductor, shall be permitted to be connected in parallel (electrically joined at both ends to form a single conductor).
50
14
What is the required Volt-Amp for lighting of an office building with 500 m² area?
14,000
15
What is the brand circuit demand for two-14 kW range in a residence of 1-phase, 230 Volt?
12.1 kW
16
Calculate total load for a 1-phase. 230 Volt branch circuit supplying two-3kW and two-4kW wall-mounted oven.
42.2 Amp
17
What is the neutral load for a 1ф system having 150 Amp of electric-discharge lighting and 250 Amp of incandescent lighting?
385 Amp
18
What is the maximum current allowed on a # 12 AWG (3.5 sq.mm) THHN copper-conductor in an ambient temperature of 122° (50°C) with a total of six (6) current-carrying conductors in the conduit? (use: Derating factor of 80% for 6 conductors and correction factor of 0.82 at 50°C)
19.68 Amp
19
What is the minimum of the ampacity of feeders with motor and other load connected ?
125% motor FL current plus ohter current
20
A hermetic motor-compressor has 25 Amp full load current. What is the rating of disconnecting means?
28.75 Amp
21
Three squirrel-cage induction motors rated as follows: 25 HP, 34 Amp full load, 20 Hp,
27 Amp full-load, and 10 Hp, 14 Amp full-load all rated at 460 volts, 3ф, 60 Hz are to be served by a feeder circuit for an ambient temperature of 30°C. What is the net computed current for feeder conductors and using non-time delay (NTD) fuse, what is the largest protective device for feeder circuit protection?
83.5 Amp & 141 Amp resp.
22
generator has a nameplate rating of 30 Amp, what is the minimum ampacity of conductor from generator for terminals the first overcurrent device?
34.5 Amp
23
A 3$. 225 kVA, 4. 16 KVI480 Volt: Dower transformer having 2.3% impedance. For supervised location, what size of fuses are realisdio protect the transformer primary?
And what size of circuit breaker is required to protect transformer secondary?
90 Amp & 600 Amp resp.
24
The ampacity of a capacitor circuit conductors shall be less than ___ percent of the rated current of the capacitor
135
25
One solar photovoltaic system; ampacity of conductors and overcurrent devices shall not
be less than ___ percent of the computed current.
125
26
PEC requires that the resistance at ground of a single electrode consisting of rod, pipe or plate shall be ___
25 ohms or less
27
What size of grounding conductor required for a circuit protected by 30 Amp circuit breaker?
2.0 sq. mm
28
What is the minimum size copper banding jumper for a service raceway containing 100 mm? THHN aluminum conductors?
22 mm²
29
is a device intended to open the circuit when it detects the current waveform characteristic that are unique to arcing fault.
AFCI
30
The maximum number of overcurrent devices that may be installed in a lighting panel is:
48
31
What is the purpose of PEC 2009?
Safeguarding of person in property
32
2. A piece of electrical equipment that is designed to operate at alternate intervals of (1)
load and no load; or (2) load and rest; or (3) load, no load rest is called ____ duty.
Intermittent
33
For dwelling units, factor for the first 3000 Volt-ampere upload is ____
100%
34
Is single-family dwelling unit having a floor area of 45 m² has a total connected load of 2575 VA. What is the minimum size service entrance conductor?
3.5 mm²
35
Additional feeders or branch circuit show me permitted where is the capacity requirements are in excess of ___ Amp at the supply voltage of __ volts or less.
2000, 600
36
What is the current-carrying capacity of each of the three copper bus-bars? The cross-sectional area of each is 1.30 cm × 2.55 cm, if each bus-bar were replaced by aluminum, what is the corresponding current-carrying capacity?
514 Amp & 361 Amp
37
For service-entrance phase conductors larger than 500 mm? copper or 800 mm?
aluminum, the required grounded conductor for the service shall be sized not less than ____
percent of the area of the largest service -entrance phase conductor.
12 1/2
38
Which of the following is a standard rating of fixed-trip inverse time CB?
50
39
All switches and circuit breakers used as switches shall be so installed that the center of the grip of the operating handle when in its highest position shall NOT be more than ____
mm above the floor or working platform.
2000
40
What is the demand factor for a single 8 kW household electric range
80%
41
every circuit breaker having an interrupting rating other than ___, shall have its interrupting rating shown on the breaker itself
5000 Amp
42
Lamp holders installed over highly combustible material shall be of the ___ type
Unswitched
43
The main purpose of bonding jumper is to connect equipment grounding conductors and ___ to the grounded conductor of the system.
Service disconnect enclosure
44
What is the maximum allowable distance interval between support securing busways?
1,500 mm
45
A 3-way and 4-way switches shall be so wired that all switching is done in the ___ conductor
Ungrounded
46
What is the minimum size of grounding rod ?
2.0 sq. mm
47
Which is the safest type of insulation for in the wiring installation especially residential and commercial buildings ?
Polyvinyl chloride
48
What is the maximum bend of rigid metallic conduit (RMC)
4 quarter
49
Sign and outline lighting outlets shall be computed at a minimum of __ VA for each required branch circuit
1200
50
Ate hermetic motor compressor has a rated load current of 20 Amp. What is the allowable ampacity of branch circuit conductor?
40 Amp
51
what is the minimum ampacity a conductor for room air conditioner with 12 Amp rated current?
15 Amp
52
According to Philippine Electrical Code, at ambient temperature of 30°C, 8.0 mm? copper conductors with the following insulation have the following ampacities: TW insulation= 30
Amp; THW insulation= 45 Amp; THHN insulation= 50 Amp. If each of these insulated wires carry the same 40 Amp, which will generate heat the fastest?
TW insulated wire
53
Codename for polyethylene insulation or PVC 75°C ?
THW
54
short circuit temperature rating of PVC insulated building wires for 30 seconds period.
150°C
55
Before installation of power cables, the basic DC test voltage in ascending more according to ICEA (insulated cable engineer association) specifications for 100% insulation level in terms of rated voltage is not about?
Five times
56
common cause of failure in termination of cable is ____
improper insulation in penciling
57
What is the normal bending radius from either edge of conduit with relation to diameter
8-9 times
58
Short circuit temperature of polyethylene cable in degree centigrade is
200
59
What is the meaning of distance receptacle outlet official window in meters ?
4
60
Receptacle outlet shall be located not more than ___ mm above countertop
450
61
Branch circuit larger than ____ Amp shall supply on then lighting outlet load.
50
62
What is the distance from the flooring to the receptacle outlet in dwelling unit in mm?
1800
63
In dwelling units, at least one wall receptacle outlet shall be installed within ___ mm of the outside edge of basin or bath tub.
900 mm
64
in dwelling units, at least one receptacle outlet for hallways more than __ meter.
3
65
The lighting load for a dwelling unit expressed in terms of volt-ampere per sq. meter must be atleast ____.
28
66
The lighting load for an office expressed in terms of volt-ampere per square meter must be at least __
28
67
What is the branch circuit demand for 12kW range and a 5 kW cooped up in a residence of 230 V, 1-phase?
11 kW
68
Feeder supply several motor load shall have an ampacity equal to the sum of the full load current rating of all the motors plus __ percent of the highest rated current in the group.
25
69
A 3phase motor draws 50 amp is at full load. What shall be the maximum inverse time circuit breaker that may be used for short circuit protection?
100 Amp
70
Branch circuit conductor to one or more units of a data processing system shall have an ampacity of ___ % of the total connect a load
125%
71
Conductors __ and larger shall be stranded when installed in raceways.
8.0 mm²
72
there is a dual voltage of a capacitor shall be reduced to ___ Volts, nominal, or less with _____ minutes after the capacitor is disconnected from the source of supply.
50,1
73
Equipment for hazardous location shall be approved for the following property
Durability
74
What is the minimum ampacity of supply feeder for a window type air-conditioning unit with 8 Amp rated load current with other load supplied?
20 Amp
75
The primary winding of a step down transformer shall be protected on the primary side by an overcurrent device rated, NOT more than a certain percentage of the primary current. What is this percentage?
125%
76
Where transformer vault is to be constructed with other buildings below it, the minimum requirement for fire resistance rating is ___ hours.
3
77
Ferro resonance is destructive phenomenon associated with?
1/5 sq.mts
78
A grounding in encircling the building or structure in direct contact with the Earth, consisting of at least 6000 mm of bare copper conductor not smaller than __ millimeters squared
30
79
Grounding shall NOT be connected to ___
Soldered fittings
80
The concrete encased electrode consisting at least ___ mm zinc galvanized coated steel reinforced or either electrically conductive or rods not less than ___ mm diameter
6000 mm, 13 mm dia.
81
Self-contained device that automatically opens an electric circuit call mom on speaker overload without getting damage is :
Molted circuit breaker
82
Expansion joints and telescoping section of raceways shall be made electrically continuous the equipment ____ or other means approved for the purpose
Bonding jumper's
83
Which off the following is not accepted as if they have the same meaning
Low-voltage
84
What is called an electrically operated switch rated in Ambris but also provide overload protection for motors ?
Magnetic starter
85
Code of ethics is resolution No. ___ series of 1995
22
86
Which of the following establishes ethical behavior among professionals?
Hippocratic oath
87
Sec.7, Article III, R.A 7920: an electrical engineer shall ___ , vilify, or destroy the good name and reputation of others.
Malign
88
Integral part of contract requirement which support technical engineering requirements which are not shown completely on drawing.
Specifications