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** Very Important - Earth Grounding

Proper Earth Grounding:
 
A ground lug is provided on the inside rear enclosure.  Additionally, a ground wire should be attached from any available screw in the front enclosure housing to the rear enclosure lug.  Then a ground wire from the rear enclosure lug to earth ground.  This will provide a path for lightning and static electricity. A proper Earth Ground Rod must be installed to ensure proper grounding and prevent damage to keypads. You should use 1 ground rod for each keypad.