FIG. A
EXAMPLE
OF
ANTENNA
GROUNDING
ACCORDING
TO
THE NATIONAL ELECTRIC CODE INSTRUCTIONS
CONTAINED IN ARTICLE
810
- "RADIO AND TELEVISION EQUIPMENT"
f
SERVICE
ENTRANCE
CONDUCTORS
SERVICE ENTRANCE
-_.
EQUIPMENT
I
POWER SERVICE
GROUNDING ELECTRODE SYSTEM
(e.g. interior metal
water
pipe)
" STAND-OFF
INSULATORS
®
ANTENNA
LEAD-IN WIRE
TO EXTERNAL ANTENNA
TERMINALS OF PRODUCT
~
GROUND CLAMPS
OPTIONAL ANTENNA GROUNDING ELECTRODE
DRIVEN 8
ft
(2.44 m) INTO THE EARTH
IF
REQUIRED BY
LOCAL
CODES.
SEE NEC SECTION 810-21
(f)
.
o Use
No
.
10
AWG (5.3
mm2)
copper, o Mount the antenna discharge unit as close
as
NO
. 8 AWG (8.4 mm
2
) aluminum, possible
to
where the lead-in wire enters the
l\Jo.
17
AWG (1.0 mm2) copper-clad steel
or
house.
bronze wire,
or
larger,
as
a ground wire.
® Secure the antenna lead-in and ground wires
to
o Use jumper wire not smaller than
NO
. 6 AWG
the house with stand-off insulators spaced from
(13.3 mm
2
) copper,
or
the equivalent, when a
4-6 feet (1.22-1 .83
m)
apart. separate antenna-grounding electrode is used.
See NEC Section 810-21
(J) .
NOTE TO THE 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 a"s practical.
4
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