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14.
Outdoor Antenna Grounding
— If an outside
antenna or cable system is connected to the
appliance, be sure the antenna or cable system
is grounded so as to provide some protection
against voltage surges and built-up static
charges. Article 810 of the National Electrical
Code, ANSI/NFPA 70, provides information with
regard to proper grounding of the mast and sup-
porting 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 require-
ments for the grounding electrode. See FIGURE
1.
15.
Lightning
— For added protection for the appli-
ance 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 dam-
age to the appliance due to lightning and power-
line surges.
16.
Power Lines
— An outside antenna system
should not be located in the vicinity of overhead
power lines or other electric light or power cir-
cuits, or where it can fall into such power lines or
circuits. When installing an outside antenna sys-
tem, extreme care should be taken to keep from
touching such power lines or circuits as contact
with them might be fatal.
17.
Overloading
— Do not overload wall outlets,
extension cords, or integral convenience recep-
tacles as this can result in a risk of fire or electric
shock.
18.
Object and Liquid Entry
— Never push objects
of any kind into the appliance through openings
as they may touch dangerous voltage points or
short-out parts that could result in a fire or elec-
tric shock. Never spill liquid of any kind on the
appliance.
19.
Servicing
— Do not attempt to service the appli-
ance yourself as opening or removing covers
may expose you to dangerous voltage or other
hazards. Refer all servicing to qualified service
personnel.
20.
Damage Requiring Service
—Unplug the appli-
ance form the wall outlet and refer servicing to
qualified service personnel under the following
conditions:
A. When the power-supply cord or plug is dam-
aged,
B. If liquid has been spilled, or objects have
fallen into the appliance,
C. If the appliance has been exposed to rain or
water,
D. If the appliance does not operate normally by
following the operating instructions. Adjust
only those controls that are covered by the
operating instructions as an improper adjust-
ment of other controls may result in damage
and will often require extensive work by a
qualified technician to restore the appliance
to its normal operation,
E. If the appliance has been dropped or dam-
aged in any way, and
F. When the appliance exhibits a distinct
change in performance — this indicates a
need for service.
21.
Replacement Parts
— When replacement parts
are required, be sure the service technician has
used replacement parts specified by the manu-
facturer or have the same characteristics as the
original part. Unauthorized substitutions may
result in fire, electric shock, or other hazards.
22.
Safety Check
— Upon completion of any ser-
vice or repairs to the appliance, ask the service
technician to perform safety checks to determine
that the appliance is in proper operation condi-
tion.
23.
Wall or Ceiling Mounting
— The appliance
should be mounted to a wall or ceiling only as
recommended by the manufacturer.
24.
Heat
— The appliance should be situated away
from heat sources such as radiators, heat regis-
ters, stoves, or other appliances (including
amplifiers) that produce heat.
25.
Liquid Hazards
— The appliance should not be
exposed to dripping or splashing and no objects
filled with liquids, such as vases should be
placed on the appliance.
FIGURE 1:
EXAMPLE OF ANTENNA GROUNDING AS PER
NATIONAL ELECTRICAL CODE, ANSI/NFPA 70
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
NEC – NATIONAL ELECTRICAL CODE
ELECTRIC
SERVICE
EQUIPMENT
GROUND
CLAMP
ANTENNA
LEAD IN
WIRE
S2898A
L-DR7_E.book Page 5 Tuesday, December 24, 2002 3:10 PM