723. Outdoor Antenna Grounding – If an outside antenna is connected to the receiver,be sure the antenna system is grounded so as to provide some protection againstvoltage surges and built up static charges. Section 810 of the National Electric Code,ANSI/NFPA No. 70-1984, provides information with respect to proper groundingof the mats and supporting structure grounding of the lead-in wire to an antenna-discharge unit, size of grounding connectors, location of antenna discharge unit,connection to grounding electrodes and requirements for the grounding electrode.See Figure below.ANTENNAANTENNA DISCHARGE UNITGROUNDING CONDUCTORSPOWER SERVICE GROUNDING ELECTRODE SYSTEMGROUND CLAMPSELECTRIC SERVICE EQUIPMENTGROUND CLAMPEXAMPLE OF ANTENNA GROUNDING AS PERNATIONAL ELECTRICAL CODENote to the CATV system installer: This reminder is provided to call the CATVsystem installer’s attention to Article 820-40 of the NEC that provides guidelinesfor proper grounding and, in particular, specifies that the cable ground shall beconnected to the 6 English grounding system of the building, as close to the pointof cable entry as practical. Please, make sure to connect the power plug to the walloutlet socket after connecting the TV to the adapter!