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Grounding and Bonding Flashcards

7 cards from real DCI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the primary purpose of bonding metallic components in a telecommunications infrastructure?

    Answer: To equalize electrical potential and reduce noise and interference

    Bonding equalizes electrical potential between metallic components, which reduces noise, interference, and the risk of electrical shock.

  2. According to ANSI/TIA-607, what color is specified for telecommunications grounding conductors?

    Answer: Green

    Green (or green with a yellow stripe) is the standard NEC and ANSI/TIA-607 color for grounding conductors.

  3. What does TBB stand for in the context of telecommunications grounding systems?

    Answer: Telecommunications Bonding Backbone

    TBB stands for Telecommunications Bonding Backbone, which is the conductor that interconnects all TGBs to the TMGB throughout a building.

  4. Where is the Telecommunications Main Grounding Busbar (TMGB) typically located in a commercial building?

    Answer: At the main telecommunications entrance facility

    The TMGB is located at the main telecommunications entrance facility and serves as the single primary reference point for the entire grounding system.

  5. According to ANSI/TIA-607, what is the minimum conductor size specified for the Telecommunications Bonding Backbone (TBB)?

    Answer: #6 AWG copper

    ANSI/TIA-607 specifies a minimum of #6 AWG copper conductor for the Telecommunications Bonding Backbone.

  6. Which ANSI/TIA standard specifically governs grounding and bonding for telecommunications systems in commercial buildings?

    Answer: ANSI/TIA-607

    ANSI/TIA-607 is the standard specifically dedicated to grounding and bonding requirements for telecommunications infrastructure in commercial buildings.

  7. According to the NEC, what is the maximum resistance to ground specified for a grounding electrode system before a supplemental electrode must be added?

    Answer: 25 ohms

    NEC Article 250 specifies that if a single grounding electrode exceeds 25 ohms resistance to ground, an additional supplemental electrode must be installed.