Example Of Antenna Grounding - Sunfire TGP-3 User Manual

EXAMPLE OF ANTENNA GROUNDING ACCORDING TO NATIONAL
ELECTRICAL CODE INSTRUCTIONS CONTAINED IN ARTICLE
NEC NATIONAL ELECTRICAL CODE.
NOTE TO CATV INSTALLER
This reminder is to call the CATV system installer's attention to Article 820-40 of the NEC that provides guide-
lines for proper grounding and in particular, specifies that the cable ground shall be connected to the grounding
system of the building as close to the point of cable entry as practical.
OUTSIDE ANTENNA GROUNDING
If an outside antenna is connected to the receiver, be sure the antenna system is grounded so as to provide
some protection against voltage surges and built-up static charges. Article 810 of the National Electrical Code,
ANSI/NFPA 70, provides information with regard to proper grounding of the lead-in wire to an antenna-discharge
unit, connection to grounding electrodes, and requirements for the grounding electrode. See Figure above.
User's Manual
810—"RADIO AND TELEVISION EQUIPMENT"
GROUND CLAMP
GROUND CLAMPS
SERVICE
ENTRANCE
EQUIPMENT
GROUND CLAMPS
ANTENNA
LEAD IN WIRE
ANTENNA DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING
CONDUCTORS
(NEC SECTION 810-21)
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)