User's Manual

February 2003
Rev. A
Page 26 of 47
2.6.3. Grounding
2.6.3.1. Grounding the Outdoor Unit (AU /SU)
The outdoor unit shall be connected to a protective earth with not less than 10 AWG conductors
having green-yellow insulation. Figure 2-11 shows the grounding cable from outdoor unit external
screw to adjacent grounding rod. The cable should be long enough to reach from the mounting
pole to the grounding rod with 3 to 6 feet extra to allow for strain relief.
Figure 2-11: Ground Connection to Outdoor Unit
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Protection from Lightning
US National Electric Department of Energy Handbook 1996 specifies that radio and television
lead-in cables must have adequate surge protection at or near the point of entry to the building.
The code specifies that any shielded cable from a detached antenna must have the shield directly
connected to a 10 AWG wire that connects to the building ground electrode.
The ground wire shall be terminated with UL listed Lug with a diameter of 0.2 inch (5.2 mm).
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