B&G Chptr 8 communication Systems

Masts and metal structures supporting antennas shall be grounded in accordance with 810.21, unless the antenna and its related supporting mast or structure are within a zone of protection defined by a _____ radius rolling sphere.

( 150-ft.) 810.15

For communications systems using coaxial cable completely contained within the building (that is, they do not exit the building) or the exterior zone of protection defined by a _____ radius rolling sphere and isolated from outside cable plant, the shield shall be permitted to be grounded by a connection to an equipment grounding conductor as described in 250.118.

( 150-ft.) 820.100 Ex

In one- and two-family dwellings, the primary protector bonding conductor or grounding electrode conductor for communications systems shall be as short as practicable, not to exceed _____ ft in length.

( 20.) 800.100(A)(4)

In one- and two-family dwellings, the grounding electrode conductor for CATV systems shall be as short as practicable, not to exceed _____ ft in length.

( 20.) 820.100(A)(4)

In one- and two-family dwellings where it is not practicable to achieve an overall maximum bonding conductor or equipment grounding conductor length of _____ ft for CATV, a separate grounding electrode as specified in 250.52(A)(5), (A)(6), or (A)(7) shall be used.

( 20.) 820.100(A)(4) Ex

In one- and two-family dwellings where it is not practicable to achieve an overall maximum primary protector grounding electrode conductor length of 20 ft, a separate communications ground rod not less than _____ ft shall be driven and it shall be connected to the power ground-ing electrode system with a 6 AWG conductor.

( 5.) 800.100(A)(4) Ex and 800.100(B)(3)(2)

Communications grounding electrodes shall be bonded to the power grounding electrode system at the building or structure served using a minimum _____ AWG copper bonding jumper.

( 6.) 800.100(D)

If a separate grounding electrode is installed for the radio and television equipment, it shall be bonded to the building's electrical power grounding electrode system with a bonding jumper not smaller than _____ AWG.

( 6.) 810.21(J)

A bonding jumper not smaller than _____ AWG copper or equivalent shall be connected between the CATV system's grounding electrode and the power grounding electrode system at the building or structure served where separate electrodes are used.

( 6.) 820.100(D)

Article _____ covers the installation of coaxial cables for distributing radio frequency signals typically employed in community antenna television (CATV) systems.

( 820.) 820.1

The bonding conductor or grounding electrode conductor for an antenna mast or antenna discharge unit shall be run to the grounding elec-trode in as straight a line as practicable.

( True.) 810.21(E)

If the building or structure served has an intersystem bonding termination, the bonding conductor for an antenna mast shall be connected to the intersystem bonding termination.

( True.) 810.21(F)(1)

For community antenna television and radio distribution systems, where the building or structure served has an intersystem bonding termina-tion established, 250.94(a) shall apply.

( True.) 820.100(B)(2)

For community antenna television and radio distribution systems, where the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor can be connected to the power service accessible means external to enclosures using the options identified in 250.94(A) Ex.

( True.) 820.100(B)(2)(3)

The outer conductive shield of a CATV coaxial cable entering a building shall be grounded as close to the point of entrance as practicable.

( True.) 820.93(A)

The bonding conductor or grounding electrode conductor for a radio/television antenna system shall be protected where subject to physical damage, and where installed in a metal raceway, both ends of the raceway shall be bonded to the _____ conductor.

( contained.) 810.21(D)

Limiting the length of the primary protector grounding conductors for communications circuits helps to reduce voltage between the building's _____ and communications systems during lightning events.

( power.) 800.100(A)(4) Note

Limiting the length of the primary protector grounding conductors for community antenna television and radio systems reduces voltages that may develop between the building's _____ and communications systems during lightning events.

( power.) 820.100(A)(4) Note

The grounding electrode conductor for an antenna mast shall be _____ where subject to physical damage.

( protected.) 810.21(D)

Bonding conductors and grounding electrode conductors shall be _____ where exposed to physical damage.

( protected.) 820.100(A)(6)

Antenna discharge units shall be located outside the building only.

(False.) 810.20(B)

For buildings with a grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits shall terminate to the power service accessible means external to enclosures using the options identified in 250.94(A) Ex.

(True.) 800.100(B)(2)(3).

NFPA 780-2014, Standard for the Installation of Lightning Protection Systems, provides information for the application of the term "rolling sphere" as used in 810.15.

(True.) 810.15 Note

The grounding electrode conductor for an antenna mast or antenna discharge unit, if copper, shall not be smaller than 10 AWG.

(True.) 810.21(H)

Radio and television receiving antenna systems shall have bonding or grounding electrode conductors that are _____.

(all of these.) 810.21(A), (B), (C), and (D).

The conductor used to ground the outer cover of a CATV coaxial cable shall be permitted to be _____.

(all of these.) 820.100(A)(1) and (3)