4810 of the National Electrical Code,ANSI/NFPA No. 70-1984 (Section 54 ofCanadian Electrical Code, Part 1) providesinformation with respect to proper groundingof the mast and supporting structure,grounding of the lead-in wire to an antenna-discharge unit, connection to groundingelectrodes, and requirements for thegrounding electrode. See example as shown.14 Power LinesAn outside antenna system should not belocated in the vicinity of overhead powerlines, other electric light or power circuits, orwhere it can fall into such power lines orcircuits. When installing an outside antennasystem, extreme care should be taken tokeep from touching or approaching suchpower lines or circuits as contact with themmight be fatal. Installing an outdoor antennacan be hazardous and should be left to aprofessional antenna installer.15 LightningFor added protection for this unit during alightning storm, or when it is left unattendedand unused for long periods of time, unplugit from the wall outlet and disconnect theantenna or cable system. This will preventdamage to the unit due to lightning andpower line surges.16 Disc TrayKeep your fingers well clear of the disc as itis closing. It may cause serious personalinjury.17 OverloadingDo not overload wall outlets or extensioncords as this can result in a risk of fire orelectric shock.18 Object and Liquid EntryNever push objects of any kind into this unitthrough openings as they may touchdangerous voltage points or “short-out” partsthat could result in a fire or electric shock.Never spill liquid of any kind on the unit.19 BurdenDo not place a heavy object on or step onthe product. The object may fall, causingserious personal injury and serious damageto the product.20 DiscDo not use a cracked, deformed or repaireddisc. These discs are easily broken and maycause serious personal injury and productmalfunction.21 ServicingDo not attempt to service this unit yourself asopening or removing covers may expose youto dangerous voltage or other hazards. Referall servicing to qualified service personnel.22 Damage Requiring ServiceUnplug this unit from the wall outlet andrefer servicing to qualified service personnelunder the following conditions.A When the power-supply cord or plug isdamaged.B If liquid has been spilled, or objects havefallen into the unit.C If the unit has been exposed to rain or water.D If the unit does not operate normally byfollowing the operating instructions. Adjustonly those controls that are covered by theoperating instructions. Improper adjustmentof other controls may result in damage andwill often require extensive work by aqualified technician to restore the unit to itsnormal operation.E If the unit has been dropped or the cabinethas been damaged.F When the unit exhibits a distinct change inperformance-this indicates a need forservice.23 Replacement PartsWhen replacement parts are required, havethe service technician verify that thereplacements he uses have the same safetycharacteristics as the original parts. Use ofreplacements specified by the unitmanufacturer can prevent fire, electricshock, or other hazards.24 Safety CheckUpon completion of any service or repairs tothis unit, ask the service technician toperform safety checks recommended by themanufacturer to determine that the unit is insafe operating condition.25 Wall or Ceiling MountingThe product should be mounted to a wall orceiling only as recommended by themanufacturer.26 HeatThe product should be situated away fromheat sources such as radiators, heat registers,stoves, or other products (includingamplifiers) that produce heat.ANTENNA DISCHARGE UNIT(NEC SECTION 810-20)ANTENNA LEADIN WIREPOWER SERVICE GROUNDINGELECTRODE SYSTEM(NEC ART 250 PART H)GROUND CLAMPELECTRICSERVICEEQUIPMENTGROUNDING CONDUCTORS(NEC SECTION 810-21)GROUND CLAMPSEXAMPLE OF ANTENNAGROUNDINGNEC - NATIONAL ELECTRICAL CODEI MPORTANT S AFEGUARDS