11.POLARIZATION - This unit is equipped with a polarized alternating current line plug (a plug having one blade wider than the other). This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug still fails to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polarized plug.
13.LIGHTNING - To protect your 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 unit due to lightning and power line surges.
14.POWER LINES - An outside antenna system should not be located in the vicinity of overhead power lines, or other electric light or power circuits, or 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.
15.OVERLOADING - Do not overload wall outlets and extension cords as this can result in a risk of fire or electric shock.
16.OBJECT AND LIQUID ENTRY - Do not push objects through any openings in this unit as they may touch dangerous voltage points or short out parts that could result in fire or electric shock. Never spill or spray any type of liquid into the unit. 17.OUTDOOR ANTENNA GROUNDING - If an outside antenna or cable system is connected to the unit, be sure the antenna or cable system is grounded to provide some protection against voltage surges and
c o n n e c t i o n t o g r o u n d i n g e l e c t r o d e s , a n d requirements for the grounding electrode. 18.SERVICING - Do not attempt to service this unit yourself as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.
19.DAMAGE REQUIRING SERVICE - Unplug this unit from the wall outlet and refer servicing to qualified service personnel under the following conditions:
A.When the
B.If liquid has been spilled, or objects have fallen into the unit.
C.If the unit has been exposed to rain or water.
D.If the unit does not operate normally by following the operating instructions. Adjust only those controls that are covered by the operating instructions, as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the unit to Its normal operation.
E.If the unit has been dropped or the cabinet has been damaged.
F.When the unit exhibits a distinct change in performance, this indicates a need for service.
20.REPLACEMENT PARTS - When replacement parts are required, be sure the service technician u s e s r e p l a c e m e n t p a r t s s p e c i f i e d b y t h e manufacturer or those that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock or other hazards.
21.SAFETY CHECK - Upon completion of any service or repairs to this unit, ask the service technician to perform safety checks to determine that the unit is in proper operating condition.
22.HEAT - The product should be situated away from heat sources such as radiators, heat registers, stoves, or other products(including amplifiers) that produce heat.
23.NOTE TO CATV SYSTEM INSTALLER - This reminder is provided to call the CATV system installer's attention to Article
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE S2898A
ANTENNA LEAD
IN WIRE
GROUND CLAMP
ANTENNA DISCHARGE UNIT (NEC SECTION
ELECTRIC SERVICE 
EQUIPMENT
GROUNDING CONDUCTORS (NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
NEC - NATIONAL ELECTRIC CODEELECTRODE SYSTEM (NEC ART 250. PART H)