Cerwin-Vega POWERED DESKTOP XD3 User Manual
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OUTDOOR ANTENNA GROUNDING
If an outside antenna is connected to your tuner or tuner-preamplifier, be sure the antenna 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 No. 70-1984, 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.
a. Use No. 10 AWG (5.3mm
2
) copper, No. 8 AWG (8.4mm
2
) aluminium, No. 17 AWG (1.0mm
2
) copper-clad
steel or bronze wire, or larger, as a ground wire.
b. Secure antenna lead-in and ground wires to house with stand-off insulators spaced from 4-6 feet (1.22 -
1.83 m) apart.
c. Mount antenna discharge unit as close as possible to where lead-in enters house.
d. Use jumper wire not smaller than No.6 AWG (13.3mm
2
) copper, or the equivalent, when a separate
antenna-grounding electrode is used. see NEC Section 810-21 (j).
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE INSTRUCTIONS CONTAINED IN ARTICLE 810
- RADIO AND TELEVISION EQUIPMENT.
NOTE TO CATV SYSTEM INSTALLER: This reminder is provided to call the CATV system installers attention to Article
820-40 of the National Electrical Code that provides guidelines for proper grounding and, in particular, specifies that the
ground cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as
practical.
DO NOT ATTEMPT TO REPAIR THIS DEVICE YOU OWN. REFER SERVICING TO QUALIFED SERVICE PERSONNEL.
Upon completion of any servicing or repairs, request the service shops assurance that only Factory Authorized
Replacement Parts with the same characteristics as the original parts have been used, and that the routine safety checks
have been performed to guarantee that the equipment is in safe operating condition.
REPLACEMENT WITH UNAUTHORIZED PARTS MAY RESULT IN FIRE, ELECTRIC SHOCK OR OTHER HAZARDS.