PEC Chapter 2 cont.

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Camskie
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304748
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PEC Chapter 2 cont.
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2015-08-15 11:50:29
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Chapter 2 of PEC
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  1. Service cables shall be supported by
    straps or other approved means within ___ mm of every service head, gooseneck,
    or connection to a raceway or enclosure and at intervals not exceeding ___ mm.
    • 300
    • 750
  2. Cables that are not
    approved for mounting in contact with a building or other structure shall be
    mounted on insulating supports installed at intervals not exceeding ____ mm
    and in a manner that maintains a clearance of not less than __ mm from the
    surface over which they pass.
    • 4 500
    • 50
  3. Where it is impracticable to locate the service head or gooseneck above
    the point of attachment, the service head or gooseneck location shall be
    permitted not farther than ___ mm from the point of attachment
    600
  4. The maximum setting
    of the ground-fault protection shall be ___ amperes, and the maximum time
    delay shall be one second for ground-fault currents equal to or greater than
    ___ amperes
    • 1200
    • 3000
  5. Where the service voltage is over 600v,
    service-entrance conductors shall not be smaller than ___ unless in
    multiconductor cable. Multiconductor cable shall not be smaller than ____.
    • 14 mm2
    • 8.0 mm(3.2 mm dia.)
  6. A device that, when
    interrupting currents in its current-limiting range, reduces the current
    flowing in the faulted circuit to a magnitude substantially less than that
    obtainable in the same circuit if the device were replaced with a solid conductor
    having comparable impedance
    Current-limiting Overcurrent Protective Device
  7. Refers to industrial
    portions of a facility where the premises wiring system has 2500 kVA or greater
    of load used in industrial process(es), manufacturing activities, or both.
    Supervised Industrial Installation
  8. A conductor, other
    than a service conductor, that has overcurrent protection ahead of its point of
    supply that exceeds the value permitted for similar conductors that are
    protected
    Tap conductors
  9. The ampacity of the
    tap conductors, not over ___ mm long, for field installations where the tap
    conductors leave the enclosure or vault in which the tap is made, the rating of
    the overcurrent device on the line side of the tap conductors shall not exceed
    10 times the ampacity of the tap conductor
    3000
  10. The ampacity of the
    tap conductors , not over ___mm long, 
    shall not be less than one-third of the rating of the overcurrent device
    protecting the feeder conductors
    7600
  11. Plug fuses of __-ampere and lower rating shall
    be identified by a hexagonal configuration of the window, cap, or other
    prominent part to distinguish them from fuses of higher ampere ratings
    15
  12. The screw shell of a
    plug-type fuseholder shall be connected to the ___ of the circuit
    load side
  13. Plug fuses of the
    Edison-base type shall be classified at not over ___ volts and ___ amperes and
    below
    • 125
    • 30
  14. ___ fuses of an
    ampere classification as specified in 2.40.5.4(a) shall not be interchangeable
    with a lower ampere classification
    Type S
  15. ___ adapters shall
    fit Edison-base fuseholders
    Type S
  16. ___ cartridge fuses of the renewable type
    shall only be permitted to be used for replacement in existing installations
    where there is no evidence of over fusing or tampering
    Class H
  17. Circuit breakers
    rated at ___ amperes or less and ___ volts or less shall have the ampere rating
    molded, stamped, etched, or similarly marked into their handles or escutcheon
    area
    • 100
    • 600
  18. Every circuit breaker
    having an interrupting rating other than ___ amperes shall have its
    interrupting rating shown on the circuit breaker
    5000
  19. Circuit breakers used
    as switches in 120-volt and 277-volt fluorescent lighting circuits shall be
    listed and shall be marked ___ or ___
    • SWD
    • HID
  20. A two-pole circuit
    breaker shall not be used for protecting a 3-phase, corner-grounded delta
    circuit unless the circuit breaker is marked ___ to indicate such suitability
    1–3
  21. An intentionally
    constructed, permanent, low-impedance electrically conductive path designed and
    intended to carry current underground-fault conditions from the point of a
    ground fault on a wiring system to the electrical supply source and that
    facilitates the operation of the overcurrent protective device or ground fault
    detectors on high-impedance grounded systems
    Effective Ground-Fault Current Path
  22. An unintentional, electrically conducting
    connection between an ungrounded conductor of an electrical circuit and the
    normally non–current-carrying conductors, metallic enclosures, metallic
    raceways, metallic equipment, or earth
    Ground Fault
  23. An electrically conductive path from the point of a ground fault on a wiring system through normally non-current carrying conductors, equipment, or the earth to the electrical supply source.
    Ground-Fault Current Path
  24. Where more than one
    separately derived system is installed, it shall be permissible to connect a
    tap from each separately derived system to a common grounding electrode
    conductor. Each tap conductor shall connect the grounded conductor of the separately
    derived system to the common grounding electrode conductor. The common
    grounding electrode conductor shall not be smaller than ___ copper or ___ aluminum
    • 80 mm2
    • 125 mm2
  25. A metal underground water pipe in direct
    contact with the earth for ___ mm or more (including any metal well casing
    effectively bonded to the pipe) and electrically continuous (or made
    electrically continuous by bonding around insulating joints or insulating pipe)
    to the points of connection of the grounding electrode conductor and the
    bonding conductors
    3 000
  26. Interior metal water
    piping located more than ____ mm from the point of entrance to the building
    shall not be used as a part of the grounding electrode system or as a conductor
    to interconnect electrodes that are part of the grounding electrode system
    1 500
  27. An electrode encased
    by at least 50 mm of concrete, located within and near the bottom of a concrete
    foundation or footing that is in direct contact with the earth, consisting of
    at least 6 000 mm of one or more bare or zinc galvanized or other electrically
    conductive coated steel reinforcing bars or rods of not less than __ mm in
    diameter, or consisting of at least 6 000 mm of bare copper conductor not
    smaller than ___
    • 13
    • 22 mm2
  28. A ground ring encircling the building or
    structure, in direct contact with the earth, consisting of at least 6 000 mm of
    bare copper conductor not smaller than ___ 
    shall be used as a grounding electrode
    30 mm2
  29. Rod and pipe electrodes shall not be less than
    ___ mm in length.
    2 400
  30. Electrodes of pipe or
    conduit shall not be smaller than __mm and, where of iron or steel, shall have
    the outer surface galvanized or otherwise metal-coated for corrosion protection
    20
  31. Electrodes of rods of
    iron or steel shall be at least __ mm in diameter. Stainless steel rods less
    than __ mm in diameter, nonferrous rods, or their equivalent shall be listed
    and shall not be less than __mm in diameter
    • 16
    • 16
    • 13
  32. Each plate electrode shall expose not less
    than ____  of surface to exterior
    soil
    0.186 m2
  33. Electrodes of iron or
    steel plates shall be at least __ mm in thickness.
    6
  34. Electrodes of
    nonferrous metal shall be at least ___ mm in thickness
    1.5
  35. Identify the 2 types
    of electrodes that are not permitted as grounding electrodes
    • Metal ungrounded gas piping system
    • Aluminum Electrodes
  36. Where more than one
    of the rod, pipe and plate  type
    electrodes of  are used, each electrode
    of one grounding system (including that used for air terminals) shall not be
    less than ___ mm from any other electrode of another grounding system
    1 800
  37. Where the
    supplemental electrode is a rod, pipe, or plate electrode, that portion of the
    bonding jumper that is the sole connection to the supplemental grounding
    electrode shall not be required to be larger than ___ copper wire or ___
    aluminum wire
    • 14 mm2 
    • 22 mm2
  38. The ground ring and
    plate electrodes shall be buried at a depth below the earth’s surface of not
    less than ___ mm
    750
  39. Rod and pipe electrodes shall be
    permitted to be buried in a trench that is at least ___ mm deep.
    750
  40. The grounding electrode conductor shall be of
    ___, ___, or ___.
    • copper
    • aluminum
    • copper-clad aluminum
  41. Where used outside,
    aluminum or copper-clad aluminum grounding conductors shall not be terminated
    within ___ mm of the earth
    450
  42. A ___ or larger
    copper or aluminum grounding electrode conductor shall be protected where
    exposed to physical damage
    22 mm2
  43. A __ mm2 grounding
    electrode conductor that is free from exposure to physical damage shall be
    permitted to be run along the surface of the building construction without
    metal covering or protection where it is securely fastened to the construction
    14
  44. Bonding jumper(s)
    from grounding electrode(s) and grounding electrode conductor(s) shall be
    permitted to be connected to an aluminum or copper busbar not less than ___ mm ×
    ___ mm
    • 6
    • 50
  45. A metal elbow that is installed
    in an underground installation of rigid non-metallic conduit and is isolated
    from possible contact by a minimum cover of ___ mm to any part of the elbow
    shall not be required to be grounded
    450
  46. The equipment bonding
    jumper shall be permitted to be installed inside or outside of a raceway or
    enclosure. Where installed on the outside, the length of the equipment bonding
    jumper shall not exceed ___ mm and shall be routed with the raceway or
    enclosure
    1 800
  47. If the terminal for
    the grounding conductor is not visible, the conductor entrance hole shall be
    marked with the word ___ or ___, the letters ___ or ___
    • green
    • ground
    • G
    • GR
  48. A 2-wire, dc system
    supplying premises wiring and operating at greater than ___ volts but not
    greater than ___ volts shall be grounded
    • 50
    • 300
  49. Mats of insulating
    rubber or other suitable floor insulation shall be provided for the operator
    where the voltage to ground exceeds ___ volts
    150
  50. The grounding
    conductor for secondary circuits of instrument transformers and for instrument
    cases shall not be smaller than  ___ copper or ___ aluminum
    • 3.5 mm2 (2.0 mm dia.) 
    • 5.5 mm2 (2.6 mmdia.)
  51. minimum insulation
    level for neutral conductors of solidly grounded systems shall be ___ volts
    600
  52. The neutral conductor
    shall be of sufficient ampacity for the load imposed on the conductor but not
    less than ___ percent of the ampacity of the phase conductors for circuits 1kv
    or over
    33
  53. Exception: In industrial and commercial premises under engineering
    supervision, it shall be permissible to size the ampacity of the neutral
    conductor to not less than ___ percent of the ampacity of the phase conductor
    20
  54. At least one
    grounding electrode shall be installed and connected to the multi-grounded
    neutral circuit conductor every ___ m
    400
  55. The voltage developed
    between the portable or mobile equipment frame and ground by the flow of
    maximum ground-fault current shall not exceed ___ volts
    100
  56. The grounding
    electrode to which the portable or mobile equipment system neutral impedance is
    connected shall be isolated from and separated in the ground by at least ____
    mm from any other system or equipment grounding electrode, and there shall be
    no direct connection between the grounding electrodes, such as buried pipe and
    fence, and so forth
    6 000
  57. A protective device
    for limiting surge voltages by discharging or bypassing surge current, and it
    also prevents continued flow of follow current while remaining capable of
    repeating these functions
    Surge Arrester
  58. Where surge arresters
    are installed on a circuit of less than ___ volts, the rating of the surge
    arrester shall be equal to or greater than the maximum continuous
    phase-to-ground power frequency voltage available at the point of application
    1 000
  59. The rating of a
    silicon carbide-type surge arrester shall be not less than ___ percent of the
    maximum continuous phase-to-ground voltage available at the point of
    application
    125
  60. Line and ground
    connecting conductors shall not be smaller than ___ copper or
    ___ aluminium, for surge arresters installed on the load side services of less than 1000 Volts
    • 2.0 mm2 (1.6 mm dia.)
    • 3.5 mm2 (2.0 mm dia.)
  61. For circuits of 1 kV and over, the
    conductor between the surge arrester and the line and the surge arrester and
    the grounding connection shall not be smaller than ___ copper or aluminum
    14 mm2
  62. For multigrounded
    neutral primary systems, the spark gap or listed device shall have a __-Hz
    breakdown of not more than 3 kV, and there shall be at least one other ground
    on the grounded conductor of the secondary that is not less than ___ mm
    distant from the surge arrester grounding electrode
    • 60
    • 6 000
  63. A protective device
    for limiting transient voltages by diverting or limiting surge current; it also
    prevents continued flow of follow current while remaining capable of repeating
    these functions
    Transient Voltage Surge Surpressor (TVSS)
  64. A TVSS shall be a
    ___ device
    listed
  65. TVSS line and ground
    connecting conductors shall not be smaller than ___ copper or
    ___ aluminum
    • 2.0 mm2 (1.6 mm dia.)
    • 3.5 mm2 (2.0 mm dia.)
  66. _____ is a complete system of air terminals, conductors, ground
    terminals, interconnecting conductors, arresters, and other connectors or
    fittings required to complete the system
    Lightning Protection System
  67. _____ are generic terms for component parts.
    Rods and Points

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