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Article 220 Branch-Circuit, Feeder and Service Calculations 6 hour test
1. For other than dwelling occupancies,
each receptacle outlet shall be computed at not less than ____ volt amperes for
each single or each multiple receptacle on one yoke.
(a)
1,500
(b) 180
(c) 20
(d) 3
2. The 3 VA per-square-foot general
lighting load for dwelling units includes general use receptacles and lighting
outlets and no additional load calculations are required for these.
(a)
True
(b) False
3. The feeder and service conductors for
motors shall be computed in accordance with Article _____.
(a)
450
(b) 240
(c)
430
(d) 100
4. The feeder and service load for fixed
electric space heating shall be computed at _____ percent of the total
connected load.
(a)
125
(b) 100
(c)
80
(d) 200
5. The load for electric clothes dryers
in a dwelling unit shall be _____ watts or the nameplate rating, whichever is
larger, per dryer.
(a)
1500
(b)4500
(c) 5000
(d)8000
6. The feeder demand load for nine 12 kW
ranges is _____.
(a)
13,000W
(b)
14,700W
(c)
24,000W
(d) 16,000W
7. For identically sized ranges rated
more than 12 kW but not more than 27 kW, the maximum demand in column C shall
be increased by _____ percent of the column C value for each additional
kilowatt that the individual ranges exceed 12 kW.
(a)
125
(b) 10
(c) 5
(d) 80
8. The feeder demand load for nine 16 kW
ranges is _____.
(a)
15,000W
(b)
28,800W
(c)
20,000W
(d) 26,000W
9. The feeder demand load for ranges
individually rated more than 8 ¾ kW and of different ratings, but none
exceeding 27 kW is calculated by adding all of the ranges together and dividing
by the total number of ranges to find an average value. The column C value for
the number of ranges is then increased by _____ percent for each kW or major
fraction that the average value exceeds 12 kW.
(a)
125
(b) 10
(c)
5
(d) 80
10. Table 220.20 may be applied to
compute the load for thermostatically controlled or intermittently used _____
and other kitchen equipment in a commercial kitchen.
(a) commercial electric cooking
equipment
(b) dishwasher booster
heaters
(c) water
heaters
(d) all of these
11. When applying the demand factors of
Table 220.20, in no case shall the feeder or service demand load be less than
the sum of _____.
(a) the total number of receptacles at
180 va per receptacle
outlet
(b) the va rating of all of the small
appliance circuits
combined
(c) the largest two kitchen equipment
loads
(d) the kitchen heating and air
conditioning loads
Article
225 Outside Branch Circuits and Feeders
12. Vegetation such as trees shall not be
used for support of _____.
(a) overhead conductor
spans
(b) surface wiring methods
(c)
luminaires
(d) electrical equipment
Article
230 Services
13. Additional services shall be
permitted for different voltages, frequencies, or phases, or for different uses
such as for _____.
(a) gymnasiums
(b) different rate
schedules
(c) flea
markets
(d) special entertainment events
14. Where a building or structure is
supplied by more than one service, or a combination of branch circuits,
feeders, and services, a permanent plaque or directory shall be installed at
each service disconnect location denoting all other _____ supplying that
building or structure and the area served by each.
(a)
services
(b) feeders
(c) branch circuits (d) all of these
15. Where a service raceway enters a
building or structure from a(n) _____ it shall be sealed in accordance with
300.5(G).
(a) transformer
vault
(b) underground distribution system
(c) cable tray (d) overhead rack
Article
240 Overcurrent Protection
16. 240.4(E) allows tap conductors to be
protected against overcurrent in accordance with other specific articles that
deal with the specific situation, outside Article 240.
(a)
True
(b) False
17. Supplementary overcurrent devices
used in luminaires or appliances shall not be required to be readily
accessible.
(a)
True
(b) False
18. A feeder tap of 10 feet or less can
be made without overcurrent protection at the tap when the rating of the
overcurrent device on the line side of the tap conductors does not exceed _____
times the ampacity of the tap conductor.
(a)
10
(b) 5
(c)
125
(d) 25
19. Circuit breakers shall be capable of
being closed and opened by manual operation. Their normal method of operation
by other means, such as electrical or pneumatic shall be permitted if means for
_____ operation are also provided.
(a)
automated
(b)
timed
(c)
manual
(d) shunt trip
20. Circuit breakers shall clearly
indicate whether they are in the open “off” or closed “on” position. Where the
circuit breaker handles are operated vertically the “up” position of the handle
shall be the _____.
(a) “on”
position
(b) “off” position
(c) tripped position (d) any of these
Article
250 Grounding
21. Temporary current flowing on the
effective ground-fault current path during a ground fault condition is
considered by the code to be objectionable current.
(a)
True
(b) False
22. AC circuits of less than 50 volts
shall be grounded if supplied by a transformer whose supply system exceeds 150
volts to ground.
(a)
True
(b) False
23. AC systems of 50 to 1000 volts that
supply premises wiring systems shall be grounded where the system can be
grounded so that the maximum voltage to ground on the ungrounded conductors
does not exceed _____.
(a) 1000
volts
(b) 300
volts
(c) 150 volts
(d) 50 volts
24. AC systems of 50 to 1000 volts that
supply premises wiring systems shall be grounded where the system is 3-phase,
4-wire, wye connected in which the neutral is used as a circuit conductor.
(a)
True
(b) False
25. AC systems of 50 to 1000 volts that
supply premises wiring systems shall be grounded where the system is 3-phase,
4-wire, delta connected in which the midpoint of one phase winding is used as a
circuit conductor.
(a)
True
(b) False
26. An alternate ac power source such as
an onsite generator is not a separately derived system if the _____ is solidly
interconnected to a service-supplied system neutral.
(a) ignition
system
(b) fuel cell
(c)
neutral
(d) line conductor
27. The grounded conductor brought to
service equipment shall be routed with the phase conductors and shall not be
smaller than specified in Table _____ when the service-entrance conductors are
not larger than 1100 kcmil copper.
(a)
250.66
(b) 250.122
(c)
310.16
(d) 430.52
28. For a grounded system, an unspliced
_____ shall be used to connect the equipment grounding conductor(s) and the
service disconnect enclosure to the grounded conductor of the system within the
enclosure for each service disconnect.
(a) grounding
electrode
(b) main bonding jumper
(c) bus bar
only
(d) insulated copper conductor only
29. Where a main bonding jumper is a
screw only, the screw shall be identified with _____ that shall be visible with
the screw installed.
(a) a silver or white
finish (b) an etched ground
symbol
(c) a green
tag
(d) a green finish
30. For a single separately derived
system, the grounding electrode conductor connects the grounding electrode to
the grounded conductor of the derived system at the same point on the
separately derived system where the _____ is installed.
(a) metering
equipment (b) transfer
switch (c) bonding jumper
(d) largest circuit breaker
31. When supplying a grounded system at a
separate building or structure, if the equpment grounding conductor is run with
the supply conductors and connected to the building disconnecting means, there
shall be no connection made between the grounded conductor and the equipment
grounding conductor at the separate building.
(a)
True
(b) False
32. When supplying a grounded system at a
separate building or structure, if the equipment grounding conductor is not run
with the supply conductors and there are no continuous metallic paths bonded to
the grounding system in both buildings involved, then the grounded circuit
conductor shall be connected to the building disconnecting means and the
grounding electrode conductor and the equipment grounding conductor at the
separate building.
(a)
True
(b) False
33. The frame of a portable generator
shall not be required to be grounded and shall be permitted to serve as the
_____ for a system supplied by cord and plug using receptacles mounted on the
generator with the grounding terminals of the receptacles bonded to the
generator frame.
(a) grounding
electrode (b) grounded
conductor
(c) ungrounded
conductor (d) equipment grounding conductor
34. The frame of a vehicle mounted
generator shall be permitted to serve as the _____ for a system supplied by
cord and plug using receptacles mounted on the vehicle or the generator with the
grounding terminals of the receptacles bonded to the generator frame and the
generator frame bonded to the vehicle frame.
(a) grounding
electrode (b) grounded
conductor
(c) ungrounded
conductor (d) equipment grounding conductor
35. Where available on the premises, each
item in the following list shall be bonded together to form the _____: 1. metal
underground water pipe, 2. metal frame of the building, 3. concrete-encased
electrode, 4. ground ring, 5. rod and pipe electrodes, 6. plate electrodes.
(a) electrical bonding
structure
(b) fault return path
(c) grounding electrode
system
(d) main bonding system
36. Where none of the items in 250.52(A)(1)
through (A)(6) are available for use as a grounding electrode, one or more of
the following shall be installed and used as the grounding electrode: _____.
(a) a ground
ring
(b) rod and pipe electrodes or plate
electrodes
(c) local metal underground systems or
structures
(d) any of these
37. Ground rod electrodes shall be
installed so that at least _____ of length is in contact with the soil. Where
rock bottom is encountered, the rod shall be driven at an angle not to exceed
45 degrees.
(a) 8
feet
(b) 5 feet
(c) one
half
(d) 80 percent
38. When driving a ground rod electrode,
if rock bottom is encountered, the rod shall be driven at an angle not to
exceed 45 degrees. Where rock bottom is encountered when driving at an angle up
to 45 degrees, the electrode shall be permitted to be buried in a trench that
is at least _____ deep.
(a) 4
feet
(b) 30
inches
(c) 8
feet
(d) 18 inches
39. When driving a ground rod electrode,
if rock bottom is encountered, the rod shall be allowed to be bent over in a
trench and buried or shortened with a hack saw.
(a)
True
(b) False
40. Grounding electrode conductors
smaller than _____ shall be in rigid metal conduit, intermediate metal conduit,
rigid nonmetallic conduit, electrical metallic tubing, or cable armor.
(a) 6
AWG
(b) 8
AWG
(c) 10
AWG
(d) 4 AWG
41. Grounding
electrode conductors _____ and larger that are not subject to physical damage
shall be permitted to be run exposed along the surface if securely fastened to
the construction.
(a) 6 AWG (b) 8 AWG (c) 10 AWG (d) 4 AWG
42. The grounding electrode conductor
shall be installed in one continuous length without a splice or joint, unless
spliced only by _____.
(a) qualified
persons
(b) irreversible compression-type
connectors listed for the purpose
(c) by the exothermic welding process
(d) either b or
c
43. The grounding
electrode conductor shall be permitted to be run to any convenient grounding
electrode available in the grounding electrode system or to one or more
grounding electrode(s) individually.
(a)
True
(b) False
44. Metal enclosures and raceways for
service conductors and equipment shall be _____.
(a)
isolated
(b) insulated
(c)
grounded
(d)grey
45. Metal enclosures and raceways for
other than service conductors shall be grounded unless they fit the situation
of one of the exceptions.
(a)
True
(b) False
46. Bonding shall be provided where
necessary to ensure _____ and the capacity to conduct safely any fault current
likely to be imposed.
(a) electrical
continuity (b) fiduciary
responsibility
(c) listing
requirements (d) electrical
demand
47. Service metal raceways and metal clad
cables are considerd effectively bonded when using threadless couplings and
connectors that are _____.
(a)
nonmetallic
(b) made up
wrenchtight
(c)
sealed
(d) these are never allowed for bonding
48. Bonding jumpers shall be used around
_____ knockouts that are punched or otherwise formed so as to impair the
electrical connection to ground. Standard locknuts or bushings shall not be the
sole means for this bonding.
(a)
concentric
(b)
eccentric
(c) field punched (d) a or b
49. An accessible means external to
enclosures for connecting intersystem _____ conductors shall be provided at the
service equipment and at the disconnecting means.
(a) bonding
(b) grounding
(c)
secondary
(d) a and b
50. When oversized, concentric, or
eccentric knockouts are encountered on metal raceways and cables with metal
sheaths for circuits of over 250 volts to ground that do not contain service
conductors, the electrical continuity of the raceway or metal cable sheath must
be ensured by bonding similar to the requirements for service raceways.
(a)
True
(b) False
51. Equipment bonding juimpers shall be
of copper or other corrosion-resistant material. A bonding jumper shall be a
_____ or similar suitable conductor.
(a)
wire
(b) bus
(c)
screw
(d) any of these
52. Bonding jumpers for service raceways
shall be sized based on the size of the ungrounded conductors within the
service raceway in accordance with _____.
(a) Table 250.66. (b) Table
250.122
(c) Table 310.16 (d)
Table 310.15(B)(6)
53. Where service conductors are
paralleled in two or more raceways or cables, the bonding jumper for each
raceway or cable shall be based on the size of the _____ in each raceway or
cable.
(a) overcurrent protection for
conductors
(b) grounded conductors
(c) service entrance
conductors
(d) sum of all conductors in the raceway
54. The bonding jumper used to bond the
metal water piping system to the service shall be sized in accordance with
_____.
(a) Table
250.66
(b) Table 250.122 (c) Table
310.16 (d) Table
310.15(B)(6)
55. The equipment grounding conductor run
with or enclosing the circuit conductors shall be _____ or metal raceways as
listed in 250.118.
(a) a copper
conductor
(b) an aluminum conductor
(c) a copper-clad aluminum
conductor
(d) any of these
56. Liquidtight flexible metal conduit up
to ½ inch trade size can be used as the equipment grounding conductor if the
length in any ground return path does not exceed 6 ft and the circuit
conductors contained in the conduit are protected by overcurrent devices rated
at _____ or less when the conduit is not installed for flexibility.
(a)
15A
(b) 20A
(c)
30A
(d) 60A
57. Liquidtight flexible metal conduit in
¾ through 1 ¼ inch trade sizes can be used as the equipment grounding conductor
if the length in any ground return path does not exceed 6 ft and the circuit
conductors contained in the conduit are protected by overcurrent devices rated
at _____ or less when the conduit is not installed for flexibility.
(a)
15A
(b) 20A
(c)
30A
(d) 60A
58. Where an equipment grounding
conductor consists of a raceway, cable tray, cable armor, cablebus framework, or
cable sheath, it shall be installed _____.
(a) in accordance with applicable code
provisions
(b) using fittings and joints and
terminations approved for the
use
(c) with all connections, joints, and
fittings made tight using suitable tools
(d) all of these
59. The equipment grounding conductor
shall not be smaller than shown in Table 250.122 but it shall not be required
to be larger than the circuit conductors supplying the equipment.
(a)
True
(b) False
60. Cord and Plug connected equipment
shall be grounded by means of _____.
(a) an equipment grounding conductor in
the cable
assembly
(b) a separate flexible wire or strap
(c) either a or b
(d) none of these
61. Ranges and clothes dryers for
existing branch circuit installations that were installed with the frame
grounded by the grounded circuit conductor are allowed to continue this
practice if all conditions of 250.140 are met.
(a)
True
(b) False
62. The grounded circuit conductor shall
be permitted to ground non-current-carrying metal parts of equipment, raceways,
and other enclosures at the supply side or within the enclosure of the ac
service-disconnecting means.
(a)
True
(b) False
63. For a cover mounted receptacle,
direct metal to metal contact of the receptacle yoke and the metal cover is
always considered to be sufficiently bonded and no equipment bonding jumper is
required.
(a)
True
(b) False
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----------------------------Educational Course Attendance Verification Form ------------------------
Attendee’s Name Date
Address
Credential Number Phone#
Course Title and Name Testelect 62
List the name of each credential held by attendee
Credited Hours 6 hrs
Email address Fax#
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To be completed by Gary Klinka www.garyklinka.com My credential link #70172
Course Password Course ID# 6803
Attendee passed the course with a greater than 70% score on Date
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