4
Introduction
IMPORTANT SAFEGUARDS
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 onto or against 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 built-up static charges, Section 810 of the
National Electrical Code, ANSI/NFPA 70, 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.
EXAMPLE OF ANTENNA GROUNDING AS PER THE
NATIONAL ELECTRICAL CODE
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)
ANTENNA LEAD IN WIRE
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
GROUND CLAMP
ELECTRIC SERVICE
EQUIPMENT
NEC-NATIONAL ELECTRICAL CODE
S2898A
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.
For
example:
a. When the power-supply cord or plug is damaged.
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 dam-
age 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.
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