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15. Outdoor Antenna Grounding – If an outside antenna or
cable system is connected to the product, be sure the an-
tenna 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 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
Figure 2.
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELEC-
TRICAL CODE, ANSI/NFPA 70
16. 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 circuits as contact with them might be
fatal.
17. Overloading – Do not overload wall outlets, extension
cords, or integral convenience receptacles as this can result
in a risk of fire or electric shock.
18. Object and Liquid Entry – Never push objects of any
kind into this product 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
product.
19. Servicing – Do not attempt to service this product your-
self as opening or removing covers may expose you to dan-
gerous voltage or other hazards. Refer all servicing to quali-
fied service personnel.
20. Damage Requiring Service – Unplug this product from
the wall outlet and refer servicing to qualified service person-
nel 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 product.
c. If the product has been exposed to rain or water.
d. If the product 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 damage and
will often require extensive work by a qualified technician
to restore the product to its normal operation.
e. If the product has been dropped or damaged in any
way.
f. When the product exhibits a distinct change in perfor-
mance – this indicates a need for service.
21. Replacement Parts – When replacement parts are
required, be sure the service technician has used replace-
ment parts specified by the manufacturer 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 service or re-
pairs to this product, ask the service technician to perform
safety checks to determine that the product is in proper oper-
ating condition.
23. Heat – The product should be situated away from heat
sources such as radiators, heat registers, stoves, or other
products (including amplifiers) that produce heat.
This appliance shall not be exposed to drippling or splashing
water and that no object filled with liquid such as vases shall
be placed on the apparatus.
-E3-
GROUND
CLAMP
ELECTRIC
SERVICE
EQUIPMENT
ANTENNA
LEAD IN
WIRE
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
S2898A
(Figure 2)
DWM-450-US - English 3/16/05, 3:58 PM4
4


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