Commercial Building Grounding and Bonding Quiz
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Questions and Answers

What is the purpose of the bonding conductor for telecommunications (BCT)?

  • Carrying fault currents to ensure proper operation of electrical protection (correct)
  • Carrying electrical load currents under normal conditions
  • Creating continuity between metal electrical components
  • Providing a conductive path for current to flow in the event of a ground fault condition

    • Which component is recommended for use as a grounding electrode?

  • Telecommunications bonding backbone (TBB)
  • Minimum 2.4 m (8 ft) by 16 mm (5/8 in) copper-clad ground rod (correct)
  • 6 AWG [4.1 mm (0.16 in)] solid grounding conductor
  • Telecommunications main grounding busbar (TMGB)

    • What is the purpose of testing the bonding and grounding system?

  • Visual inspection of the system
  • Continuity and resistance measurements from the TGB to racks, cabinets, and network equipment (correct)
  • Ensuring all connections are in place
  • Testing for hazardous potential differences between different systems and equipment

    • What is the purpose of the telecommunications grounding busbar (TGB)?

    <p>To provide a common grounding point for telecommunications equipment</p> Signup and view all the answers

    What is the purpose of the grounding equalizer (GE)?

    <p>Equalizing hazardous potential differences between different systems and equipment</p> Signup and view all the answers

    What is the recommended resistance for the grounding electrode system?

    <p>25 ohms or less</p> Signup and view all the answers

    What is the purpose of bonding in the telecommunications environment?

    <p>Creating continuity between metal electrical components</p> Signup and view all the answers

    How should LAN equipment, such as switches, be grounded?

    <p>Per the manufacturer’s installation instructions</p> Signup and view all the answers

    What is the purpose of the telecommunications bonding backbone (TBB)?

    <p>To provide a common bonding connection for telecommunications equipment</p> Signup and view all the answers

    What is the purpose of grounding the cable tray in a telecommunications room?

    <p>To prevent hazardous potential differences between different systems and equipment</p> Signup and view all the answers

    How should each section of a cable tray be connected to the grounding conductor wire?

    <p>Bonded with a mechanical connector</p> Signup and view all the answers

    What is the purpose of the telecommunications main grounding busbar (TMGB)?

    <p>To provide a common grounding point for telecommunications equipment</p> Signup and view all the answers

    What are the two areas of grounding that apply to commercial buildings?

    <p>Grounding electrode system and equipment grounding system</p> Signup and view all the answers

    What does the equipment grounding system connect earth ground to?

    <p>Non-current carrying conductive materials</p> Signup and view all the answers

    What are the components comprising the telecommunications grounding system?

    <p>Bonding conductor for telecommunications (BCT), Telecommunications main grounding busbar (TMGB), Telecommunications bonding backbone (TBB), Telecommunications grounding busbar (TGB)</p> Signup and view all the answers

    What is the grounding electrode system also known as?

    <p>Earthing system</p> Signup and view all the answers

    What does the equipment grounding system consist of?

    <p>Equipment grounding conductor(s) and a main bonding jumper within the electrical system’s main distribution panel</p> Signup and view all the answers

    What is the purpose of the bonding conductor for telecommunications (BCT)?

    <p>To bond telecommunications systems to the grounding system</p> Signup and view all the answers

    What is the purpose of the telecommunications main grounding busbar (TMGB)?

    <p>To provide a common grounding point for telecommunications systems</p> Signup and view all the answers

    What is the purpose of the telecommunications bonding backbone (TBB)?

    <p>To interconnect grounding electrodes, grounding electrode conductors, and equipment grounding conductors</p> Signup and view all the answers

    What is the purpose of the telecommunications grounding busbar (TGB)?

    <p>To provide a common grounding point for telecommunications systems</p> Signup and view all the answers

    What is the purpose of the grounding electrode system?

    <p>To provide the connection to earth</p> Signup and view all the answers

    What does the equipment grounding system connect earth ground to?

    <p>Non-current carrying conductive materials</p> Signup and view all the answers

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