Jwin JK-333 - Manual (Page 4)

18. Object and Liquid Entry – Care should be taken so that objects do not fall and
liquids are not spilled into the unit through openings.
19. Damage Requiring Service – The appliance should be serviced by qualified
service personnel when:
A. The power supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled into the appliance; or
C. The appliance has been exposed to rain; or
D. The appliance does not appear to operate normally or exhibits a marked
change in performance; or
E. The appliance has been dropped, or damaged.
20. Servicing – The user should not attempt to service the appliance beyond
instructions given in the operating instructions. All other servicing should be
referred to qualified service personnel.
POWER LINES
SERVICE ENTRANCE
CONDUCTORS
GROUND WIRE
GROUND CLAMPS
a. a
BONDING JUMPER c
GROUND CLAMPS
STANDOFF
INSULATORS
b
MAST
ANTENNA
LEAD IN WIRE
ANTENNA
DISCHARGE
UNIT
c
TO EXTERNAL ANTENNA
TERMINALS OF PRODUCT
GROUND WIRE a. a
GROUND CLAMPS
OPTIONAL ANTENNA GROUNDING ELECTRODE
DRI/ENG FEET (2.44 m) INTO THE EARTH
IF REQUIRED BY LOCAL CODES SEE NEC
SECTION 810-21 (1)
SERVICE
ENTRANCE
EQUIPMENT
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(e.g. ntenor water pipe)
FIGURE 73.1
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE
INSTRUCTIONS CONTAINED IN ARTICLE 810-
“RADIO AND TELEVISION EQUIPMENT”
a. Use No. 10 AWG (5.3 mm 2 ) copper, No. 8 AWG (8.4 mm 2 ) aluminium, No. 17
AWG (1.0 mm 2 ) copper-clad steel or bronze wire, or larger, as a ground wire.
b. Secure antenna lead-in and ground wire 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 (13.3 m 2 ) copper, or the
equivalent when a separate antenna-grounding electrode is used. See NEC
Section 810 - 21 (i).
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