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NEC (National Electrical Code) Standards
A Note for the Cable Television (CATV) Installer
This reminder is to call the CATV system installer’s attention to Article 820-40 of the NEC that provides
guidelines for proper grounding and in particular, species that the cable ground shall be connected
to the grounding system of the building as close to the point of cable entry as practical.
Antenna Grounding Outside the House
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 Na-
tional 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 diagram below.
Cable TV Coaxial Cable, Satellite
Dish Cables, and Television
Antennas should be grounded
BEFORE the point of entry into
the house.