▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲
ANTENNA
WIRE
GROUND
CLAMP
ELECTRIC
SERVICE
EQUIPMENT
GROUND
CLAMPS 
POWER SERVICE GROUNDING
NEC - NATIONAL ELECTRICAL CODE ELECTRODE SYSTEM (NEC ART 250, PART H)
13. OUTDOOR ANTENNA GROUNDING - If an outside antenna or cable system is connected to the video unit, be sure the antenna or cable system is grounded to provide some protection against voltage surges and
14.LIGHTNING - For added protection of this video unit during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the video unit due to lightning and power line surges.
15.POWER LINES - An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits, where it can fall into such power lines or circuits. When installing an outside antenna system extreme care should be taken to keep from touching such power lines or circuits as contact with them might be fatal.
16.OVERLOADING - Do not overload wall outlets and extension cords as this can result in the risk of fire or electric shock.
17.OBJECTS AND LIQUIDS - Never push objects of any kind into this video unit through openings as they may touch dangerous voltage points or short out parts that could result in a fire or electric shock. Never spill liquids of any kind onto the unit. Should spillage occur, unplug unit and have it checked by a technician before use.