JBL S7150 - Manual (Page 5)

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PRECAUTIONS
17. 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 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 1).
18. Damage Requiring Service – The product
should be serviced by qualified service
personnel when:
a. The power supply or the plug has been
damaged; or
b. Objects have fallen on, or liquid has
been spilled into, the product; or
c. The product has been exposed to rain; or
d. The product does not appear to operate
normally or exhibits a marked change
in performance; or
e. The product has been dropped, or
the enclosure damaged.
19. Servicing – The user should not attempt to
service the product beyond that described
in the operating instructions. All other
servicing should be referred to qualified
service personnel.
Note to CATV system installer:
This reminder is provided to call the CATV
system installer’s attention to Article 820-22
of the NEC that provides guidelines for proper
grounding and, in particular, specifies that
the cable ground shall be connected to the
grounding system of the building, as close
to the point of cable entry as practical.
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)
Figure-1
Example of Antenna Grounding
as per National Electrical Code