Marantz PMD420 - Page 23

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FIG. 1
EXAMPLE OF
ANTENNA
GROUNDING
ACCORDING
TO
NATIONAL
ELECTRICAL
CODE INSTRUCTIONS
CONTAINED
IN
ARTICLE
810
-
"RADIO
ANO
TELEVISION
EQUIPMENT"
SERVICE/
ENTRANCE
CONDUCTORS
SERVICE
ENTRANCE
EQUIPMENT-
POWER SERVICE
GROUNDING
ELECTRODE SYSTEM
(e
. g.
interior
metal water pipe)
a.
Use
No.10 AWG (5.3mm
2
)
copper,
No.8 AWG (8.4mm
2
)
aluminum,
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
(1.22-1.83m)
apart.
NOTE TO
CATV
SYSTEM INSTALLER:
GROUND
CLAMPS
"'
STANDOFF
INSULATORS
b
MAST
i--if----A
NT
EN
NA
LEAD
- IN
WI
RE
ANTENNA
DISCHARGE
UNIT
c
TO
EXTERNAL
ANTENNA
TERMINALS
OF
PRODUCT
OPTIONAL
ANTENNA
GROUNDING
ELECTRODE
DRIVEN
8 FT (2.44m)
INTO
THE
EARTH
IF
REQUIRED
BY
LOCAL
CODES.
SEE
NEC
SECTION
810-21
( f ).
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,ortheequivalent,
when a separate antenna-grounding elec-
trode
is
used
.
See
NEC Section
810
-
21
(
J)
.
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.