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13. Outdoor Antenna grounding - If an outside antenna
or cable system is connected to the unit, be sure the
antenna or cable system is grounded so as to provide
some protection against voltage surges and built-up sta-
tic charges. Article 810 of the National Electrical Code,
ANSI/NFPA No. 70, provides information with respect
to proper grounding of the mast and supporting struc-
ture, grounding of the lead-in wire to an antenna dis-
charge unit, size of grounding conductors, location of
antenna-discharge unit, connection to grounding elec-
trodes, and requirements for the grounding electrode.
(Fig. A)
14. Lightning - For added protection for this unit receiver
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.
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, 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 cir-
cuits as contact with them might be fatal.
16. Overloading - Do not overload wall outlets and exten-
sion cords as this can result in a risk of fire or electric
shock.
17. Object and Liquid Entry - Never push objects of any
kind into this 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 liquid of
any kind on the unit.
18. Servicing - Do not attempt to service this unit yourself
as opening or removing covers may expose you to dan-
gerous 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 power-supply cord or plug is damaged or
frayed.
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 improper
adjustment of other controls may result in damage and
will often require extensive work by a qualified techni-
cian to restore the unit to its normal operation.
e. If the unit has been dropped or damaged in any way.
f. When the unit exhibits a distinct change in perfor-
mance, this indicates a need for service.
20. Replacement Parts - 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, injury to persons or other hazards.
21. Safety Check - Upon completion of any service or
repairs to this unit, ask the service technician to per-
form routine safety checks to determine that the unit is
in proper operating condition.
22. Heat - This unit product should be situated away from
heat sources such as radiators, heat registers, stoves, or
other products (including amplifiers) that produce heat.
GROUND CLAMPS
NEC - NATIONAL ELECTRICAL CODE
EXAMPLE OF ANTENNA GROUNDING AS PER
NATIONAL ELECTRICAL CODE
S2898A
WIRE
DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
ELECTRODE SYSTEM
(NEC ART 250, PART H)
SERVICE
EQUIPMENT
CLAMP
ANTENNA
LEAD IN
ANTENNA
POWER SERVICE GROUNDING
GROUND
ELECTRIC
FIGURE A