18. Use proper power sources - Plug the product into
a proper
power
source, as described
in
the operating
instructions
or
as marked on the product.
19.
Avoid power lines- Use extreme care when
installing an outside antenna system
to
keep from
touching power lines
or
circuits, as contact with
them may befatal. Do not install external antennas
near overhead
power
lines
or
other electric light
or
power circuits, nor where an antenna can fall into
such circuits or power lines.
20.
Ground all outdoor antennas - Ifan external
antenna
or
cable system is connected
to
this
product, besure the antenna
or
cable system is
grounded. This will provide
some
protection against
voltage surges and built-up static charges.
Section 810
of
the National Electrical CodeANSI/
N
FPA
No. 70 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 forthe
ground electrode. Refer
to
the antenna grounding
illustration on this page.
Antenna
grounding
Example
of
antenna grounding as per National Electrical
Code, ANSI/NFPA 70.
1----Cl>.4__--
Antenna lead
in
wire
Ground clamp
-......tI-_JI'
Ffl+----+_Antenna discharge unit
(NEC Section 810-20)
f+---,-r"---Grounding conductors
(NEC Section 810-21)
Ground clamps
=-Power
service grounding
electrode system
(NEG
ART
250, Part
H)
Note
to
CATV
system
installer
This reminder
is
provided to call the
CATV
system
installer's attention
to
Article 820-40
of
the NEC (of
USA)
that provides guidelines for proper grounding.
In
particu-
lar,
it specifies that the cable ground shall be connected
to the grounding system
of
the building,
as
close to the
point
of
cable entry as is practical.
.....BOS~
Better
sound
through
research®
©2001
Bose
Corporation,
The Mountain,
Framingham,
MA
01701-9168
USA
255805
AM
Rev.OO
JN1
0494
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