Additional Terms in PEC Chapter 2

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Author:
Camskie
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304570
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Additional Terms in PEC Chapter 2
Updated:
2015-08-15 11:50:22
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camille chaptertwo
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Additional Terms and Definitions in Chapter 2
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  1. A device capable to drawing lightning discharge
    to it in preference to vulnerable parts of the protected area.
    AIR TERMINAL…
  2. Connection
    between a conductive or inductive metal object and an element of a lightning
    protection system to accomplish electrical continuity between two.
    BONDING..
  3. A conductor formed of a number of wires stranded together.
    CABLE…
  4. Small
    concrete, masonry or metal vent protruding through the roof or attached to the
    side of a building used typically in heating or venting, subject to protection
    under Class I requirements.
    CHIMNEY…
  5. All conductors, fittings, and fixture necessary
    to protect ordinary buildings and structures not exceeding 23m in height
    CLASS I Materials…
  6. All
    conductors, fittings, and fixture necessary to protect ordinary buildings and
    structure exceeding 23m in height.
    CLASS II Materials…
  7. The portion of a lightning protection system
    designed to carry the lightning discharge between air terminals and ground
    CONDUCTORS…
  8. Steel with a coating of copper to be bonded
    COPPER-CLAD STEEL…
  9. A conductor encircling a building and
    inter-connecting all ground terminals
    COUNTERPOISE (ground)…
  10. An attachment to secure the conductor to the
    structure
    FASTENER…
  11. Self-closing
    gage hatches, vapor seals, pressure-vacuum breather valves, flame arresters, or
    other reasonably effective means to minimize the possibility of flame entering
    the vapor space of a tank.
    FLAME PROTECTION…
  12. When flammable vapors are mixed with air in certain proportions,
    the mixture will burn rapidly when ignited. The combustion range for ordinary
    petroleum products, such as gasoline, is from about 1.5 to 7.5 percent of
    vapour by volume, the remainder being air.
    FLAMMABLE AIR-VAPOR MIXTURES…
  13. The vapors given from a flammable liquid at or
    above its flash point.
    FLAMMABLE VAPORS…
  14. The minimum
    temperature at which it gives off vapor sufficient concentration to form an
    ignitable mixture with air near the surface of the liquid within the vessel as
    specified by appropriate test procedure and apparatus.
    FLASH POINT…
  15. Structures so constructed that gas or air can
    neither enter nor leave the structure except through vents or piping provided
    for the purpose
    GASTIGHT…
  16. That
    portion of a lightning protection system extending into the earth, such as a
    ground rod, ground plate or the conductor itself, serving to bring the
    lightning protection system into electrical contact with the earth.
    GROUND TERMINAL…
  17. For purpose of lighting protection, a building over 23m in height.
    HIGH-RISE BUILDING…
  18. Metal objects at or above the eave or flat roof
    level that are subject to a direct lighting stroke.
    METAL BODY OF CONDUCTANCE…
  19. Metal objects located within 2000mm of a
    conductor subject to buildup of potential.
    METAL BODY OF INDUCTANCE…
  20. A building with either sides or roof made of or covered with sheet metal.
    METAL-CLAD BUILDING…
  21. A building with
    electrically continuous framing of sufficient size and conductivity to be
    utilized as part of the lightning protection system.
    METAL-FRAMED BUILDING…
  22. A spark occurring between nearby metallic
    objects or from such objects to the lightning protection system or to ground
    SIDEFLASH…
  23. As used in this Code, the term ____ means any short air space between
    two conductors electrically insulated from or remotely electrically connected
    to each other.
    SPARK GAP…
  24. A smoke or vent stack is classified as
    _________if the cross-sectional area of the flue is greater than 0.32m2
    and the height is greater than 23m
    STACK, HEAVY DUTY…
  25. These are opening through a tank shell or roof
    above the surface of the liquid.
    VAPOR OPENINGS…
  26. The __________ provided by the grounded
    air terminal or mast or overhead ground wire is that adjacent space which is
    substantially immune to direct strokes of lightning
    ZONE OF PROTECTION…

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