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12 Outdoor Antenna Grounding—If
an outside antenna or cable system is
connected to the video product, be sure the
antenna or cable system is grounded so as to
provide some protection against voltage surges
and built-up static charges. Section 810 of the
National Electrical Code, ANSI/NFPA No. 70
(Section 54 of Canadian Electrical Code, Part 1)
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. See example below.
Example of Antenna Grounding
16 Lightning—For added protection for this
video product 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 product due to lightning and power line
surges.
Service
17 Servicing—Do not attempt to service this
video product yourself as opening or removing covers
may expose you to dangerous voltage or other
hazards. Refer all servicing to qualified service
personnel.
18 Conditions Requiring Service—Unplug
this video product 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.
B. If liquid has been spilled, or objects have
fallen into the video product.
C. If the video product has been exposed to rain or
water.
D. If the video product does not operate normally by
following the operating instructions. Adjust only
those controls that are covered by the operating
instructions. Improper adjustment of other controls
may result in damage and will often require
extensive work by a qualified technician to restore
the video product to its normal operation.
E. If the video product has been dropped or the
cabinet has been damaged.
F. When the video product exhibits a distinct change
in performance—this indicates a need for service.
19 Replacement Parts—When replacement
parts are required, have the service technician verify
that the replacements he uses have the same safety
characteristics as the original parts. Use of replace-
ments specified by the video product manufacturer can
prevent fire, electric shock, or other hazards.
20 Safety Check—Upon completion of any
service or repairs to this video product, ask the service
technician to perform safety checks recommended by
the manufacturer to determine that the video product is
in safe operating condition.
21 Wall or Ceiling Mounting—The product
should be mounted to a wall or ceiling only as
recommended by the manufacturer.
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.
IMPORTANT SAFEGUARDS
13 Power Lines—An outside antenna
system should not be located in the vicinity of
overhead power lines, 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 or approaching
such power lines or circuits as contact with
them might be fatal. Installing an outdoor
antenna can be hazardous and should be left
to a professional antenna installer.
Use
14 Cleaning—Unplug this video
product from the wall outlet before cleaning.
Do not use liquid cleaners or aerosol cleaners.
Use a damp cloth for cleanig.
15 Object and Liquid Entry—Never
push objects of any kind into this video product
through openings as they may touch danger-
ous voltage points or “short-out” parts that
could result in a fire or electric shock. Never
spill liquid of any kind on the video product.
ANTENNA
LEAD IN
WIRE
GROUND CLAMP
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
ELECTRIC SERVICE
EQUIPMENT
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)