Single Ground Rod System
A common, but not NEC compliant, grounding system uses a separate ground rod located close to the antenna. This system has the potential for unwanted ground loops in the cabling. See Figure 1 below.
Optional Ground Rod System
A optional NEC compliant system uses #10 copper wire running to a ground rod (8 feet deep) close to the antenna. A cold water metal pipe running into the ground makes a good ground (rod). The NEC specifies the ground connection be within 5 feet of the point the pipe enters the ground. The ground rod (or pipe) is connected to the electrical service ground using heavier #6 copper wire.
Figure 1 - Common Installation|
Figure 2 - Optional Ground Rod System
Over-the-Air Digital TV (OTA DTv)
Alternative Grounding Systems
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