Grounding, Bonding & Electrical Protection Flashcards
7 cards from real CPCT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Grounding, Bonding & Electrical Protection flashcards as text
A surge protector for telecommunications equipment should be bonded to the grounding system at which point?
Answer: At the TGB in the same telecommunications room
Surge protectors must be bonded to the TGB in the same room to ensure a common ground reference and minimize ground potential differences.
What is the maximum resistance typically specified for a telecommunications grounding system measured from the TMGB to the grounding electrode?
Answer: TIA-607 does not specify a maximum resistance value
TIA-607 does not specify a maximum resistance value for the grounding electrode; it focuses on bonding conductors and busbars rather than electrode resistance.
Which of the following is NOT an acceptable grounding electrode for telecommunications systems per the NEC?
Answer: Plastic water supply pipe
Plastic pipes are non-conductive and cannot serve as grounding electrodes; the NEC requires metallic or conductive electrode systems.
Equipotential bonding in a data center telecommunications room is intended to:
Answer: Ensure all metallic components are at the same electrical potential to prevent shock and equipment damage
Equipotential bonding connects all metallic components to a common reference point, eliminating voltage differences that could cause equipment damage or personnel hazard.
What type of conductor insulation color is typically required for TBB conductors to distinguish them from power system grounding conductors?
Answer: Orange or yellow
TIA-607 recommends orange or yellow insulation for TBB conductors to visually distinguish them from power grounding conductors which use green.
When a TGB must be installed more than 6 meters from the TMGB, what is required per TIA-607?
Answer: The TBB conductor size must be increased according to the TIA-607 table
TIA-607 specifies that as TBB run length increases beyond certain thresholds, conductor size must increase to maintain adequate grounding performance.
Which of the following best describes the difference between grounding and bonding in telecommunications installations?
Answer: Grounding connects equipment to earth potential; bonding connects metallic components together to equalize potential
Grounding establishes a reference to earth potential, while bonding interconnects metallic components to ensure they share the same potential regardless of earth connection.