VDV Lv1 L8
Article ___ of the NEC is the primary article that covers provisions for grounding and bonding that are necessary for a safe installation.
250
An intersystem bonding termination must provide a minimum of ___ terminals for intersystem bonding conductors.
3
The minimum size of a bonding conductor must be ___ copper.
6 AWG
The maximum size of a backbone bonding conductor (BBC) is ___.
750 kcmil
Specific information on grounding and bonding of fiber-optic systems can be found in Article ___ of the NEC.
770
Part III of Article ___ , Protection, of the NEC covers the use and installation of primary protectors for entrance communication cables.
800
It is not common to have multiple connection points along the length of a TEBC.
False
Proper grounding and bonding ensure that there is a difference of potential between the metal components of a VDV system.
False
A PBB is
a busbar that serves as the central connection point between the grounding electrode system for a building electrical service and the grounding and bonding system for telecommunications, connected to the grounding electrode system for a building electrical service by the TBC, & located in the TEF.
A bonding conductor is ___.
a conductor used to bond metal objects when required, also known as a bonding jumper
is a conductive metal object used to establish a connection from an electrical circuit to the earth.
grounding electrode
A(n) ___ is a component that is not connected to an SBB.
grounding electrode conductor (GEC)
A(n) ___ is a device that provides a means of connecting bonding conductors from communications systems to a grounding electrode system.
intersystem bonding termination
Primary protectors are
required for overhead (aerial) and underground communication cables that enter a building or structure, & surge protectors specifically designed to protect communication cables and the equipment connected to the cables from electrical surges
The potential of the earth is considered to be ___.
zero
The recommended minimum stand-off size for a PBB insulator is
2"
Match the images...
Copper - taps, tools - crimpers, lugs - terminal connectors, paired half moons - dies
are listed copper or copper alloy busbars that are 1/4-inch thick by four inches wide and are available in various lengths.
PBBs
___ provide overvoltage and overcurrent protection by diverting surge energy away from personnel and sensitive equipment to ground.
Primary protectors
___ can be caused by lightning or direct contact with a power line and an induced field between either an entrance communication cable and lightning or an entrance communication cable and a power line.
Surges
TIA/EIA-607 is not intended to replace the NEC.
True
Often, VDV systems are installed or connected ___ a building's electrical power system is installed and energized.
after
A conductor must be
as short as possible, made of copper or another corrosion-resistant conductive material, & run as straight as possible
An ACEG must
be copper & may be insulated
A TBB must
be green or marked with a distinctive green color, & be uniform in size
Bonding
ensures that there is no difference of potential between the metal components of a VDV system, & is the act of connecting two metallic parts to form a continuous, low-impedance electrical path
A ___ conductor is a conductor that bonds a primary bonding busbar to the grounding electrode system for a building electrical service.
telecommunications bonding
A grounding and bonding system begins at a(n) ___.
telecommunications entrance facility (TEF)
A(n) ___ conductor is a conductor that connects a primary bonding busbar or secondary bonding busbar to equipment cabinets or racks.
telecommunications equipment bonding conductor (TEBC)
If the metal components of a VDV system were not grounded and bonded, a difference of potential between components could exist, which could result in the flow of unwanted current.
true
