Example of Antenna
Grounding
(continued)
1. Mount the 75 ohm grounding block or discharge unit
as close as possible to where the downlead enters
the house.
2. The ground wires for both the mast and the downlead
should be copper or aluminum wire, number eight (8)
or larger.
3. The downlead wire from the antenna to the antenna
grounding block or discharge unit and the mast ground
wire should be secured to the house with stand-off
insulators, spaced from four (4) to six (6) feet apart.
NOTE: 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 ground. Consult a TV
serviceman for the proper depth in your location.
Do’s and Don’ts When Installing Antennas
If you are not completely sure that you can install the
antenna safely, Do Not Try It! Contact a professional
installer instead.
Stay at least twice the length of the antenna plus the length
of the mast assembly away from power lines. If you do not
have enough room, contact a professional to do the job.
For mast support, use only 1-1/4” O.D. pipe or larger
antenna mast sections. Lengths over 10 feet should be
guyed at least every 10 foot section.
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Example of Antenna
Grounding
NOTE: Grounding the antenna and mast provides
lightning protection for the antenna and your TV set.
All outdoor antenna installations should be properly
grounded. To effectively protect the installation, the coaxial
cable(s) should be grounded before they enter the house.
The grounding of the coaxial cable is made using a “ground
block” and copper wire (not supplied). For information and
the materials needed to ground your antenna installation,
visit your local electronics store.
If you are not sure how to install the grounding block and
rod, please consult your local retailer or TERK’S Technical
Support Department at 1-800-942-8375.
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Antenna Lead
In Wire
Ground
Clamp
Electric
Service
Equipment
Antenna
Discharge Unit
(NEC Section 810-20)
Power Service Grounding
Electrode System
(NEC Art 250, Part H)
Ground
Clamps
Grounding Wire Conductors
(NEC Section 810-21)
NEC - National Electrical Code
Example of antenna grounding as per
National Electrical Code, ANSI/NFPA 70
Rain Drip Loop On
Lead-In To TV
(continued)
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