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

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

LEAD IN

WIRE

GROUND

CLAMP

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-

ELECTRIC

SERVICE EQUIPMENT

ANTENNA DISCHARGE UNIT (NEC SECTION 810-20)

GROUNDING CONDUCTORS (NEC SECTION 810-21)

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

GROUND CLAMPS

POWER SERVICE GROUNDING

ELECTRODE SYSTEM

(NEC ART 250, PART H)

NEC – NATIONAL ELECTRICAL CODE

S2898A

5