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Important Safeguards (Continued)
14. If an outside antenna is connected to the television equipment, be sure the antenna system is grounded
so as to provide some protection against voltage surges and built-up static charges. Section 810 of
the National Electrical Code provides information with respect to proper grounding of the mast and
supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding
conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements
for the grounding electrode.
ELECTRIC
SERVICE
EQUIPMENT
15. For added protection for this television equipment 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. This
will prevent damage to the equipment due to lightning and power-line surges.
16. 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.
17. Do not overload wall outlets and extension cords as this can result in fire or electric shock.
18. Never push objects of any kind into this television equipment through cabinet slots as they may touch
dangerous voltage points or short out parts that could result in a fire or electric shock. Never spill liquid
of any kind on the television equipment.
19. Do not attempt to service this television equipment yourself as opening or removing covers may
expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.
20. Unplug this television equipment from the wall outlet and refer servicing to qualified service personnel
under the following conditions:
A. When the power cord or plug is damaged or frayed.
B. If liquid has been spilled into the television equipment.
C. If the television equipment has been exposed to rain or water.
D. If the television equipment does not operate normally by following the operating instructions. Adjust
only those controls that are covered by the operating instructions as improper adjustment of other
controls may result in damage and will often require extensive work by a qualified technician to
restore the television equipment to normal operation.
E. If the television equipment has been dropped or the cabinet has been damaged.
F. When the television equipment exhibits a distinct change in performance — this indicates a need
for service.
21. Upon completion of any service or repairs to this television equipment, ask the service technician to
perform routine safety checks to determine that the television is in safe operating condition.
22. When replacement parts are required, be sure the service technician has used replacement parts
specified by the manufacturer that have the same characteristics as the original part. Unauthorized
substitutions may result in fire, electric shock, or other hazards.
4
0-9 27N-S50 2.1
EXAMPLE OF ANTENNA GROUNDING
ACCORDING TO NATIONAL ELECTRICAL CODE.
GROUND CLAMPS
POWER SERVICE GROUNDING ELECTRODE SYSTEM
(NEC PART 250, PART H)
NEC - NATIONAL ELECTRICAL CODE
4
ANTENNA LEAD-IN WIRE
GROUND CLAMP
ANTENNA DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
6/1/00, 11:41 AM
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