Providing Lightning Protection for the Antenna

Providing Lightning Protection for the Antenna

1.Mount lightning arrestor or 75 ohm grounding block as close as possible to where lead-in enters house.

2.Ground wires for both mast and lead-in should be copper or aluminum wire, number 8 or larger.

3.Lead-in wire from antenna to lightning arrestor or 75 ohm grounding block and mast ground wire should be secured to house with stand-off insulators, spaced from four to six feet apart.

4.In the case of a “ground up” antenna installation, it may not be necessary to ground the mast if the mast extends four or more feet into the earth. Consult your TV service man for proper depth in your

area.

Example of antenna grounding as per

National Electrical Code, ANSI/NFPA 70

Antenna

Ground Lead-In Wire

Clamp

Grounding Conductors
(NEC Section 810-21)
Electric
Service
Equipment	Antenna
	Discharge Unit
	(NEC Section 810-20)
	(May substitute a 75 ohm
	Coax Grounding Block)
	Rain Drip Loop On
Ground	Lead-In To TV
Clamps

Power Service Grounding

Electrode System

(NEC Art 250, Part H)

NEC - National Electrical Code

ENGLISH