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 install-
ing
an
outside antenna system to keep from touching
power lines or circuits, as contact with them may be
fatal.
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 - If
an
external
antenna or cable system is connected to this product,
be sure 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 Code ANSII
NFPA
No. 70 provides information with respect to
proper grounding
of
the mast and supporting struc-
ture, grounding of the lead-in wire
to
an
antenna dis-
charge unit, size
of
grounding conductors, location
of
antenna-discharge unit, connection to grounding elec-
trodes, and requirements for the ground electrode.
Refer to the antenna grounding illustration
on
this
page.
2b
Antenna grounding
Example of antenna grounding as per National Electrical
Code, ANSI/NFPA
70.
1---<\>'''---
Antenna lead-in wire
Ground
clamp_~
....
*,
ff1_-+-
Antenna discharge unit
(NEC
Section 810-20)
Grounding conductors
(NEG
Section 810-21)
Ground clamps
Powerservice 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
particular,
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.
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