2b
October 16, 2001
AM253543_03_V.PDF
Important Safety Information
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 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
ANSI/NFPA No. 70 provides informaiton 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 for the 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.
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 ground-
ing. 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.
Antenna lead-in wire
Antenna discharge unit
(NEC Section 810-20)
Grounding conductors
(NEC Section 810-21)
Power service grounding
electrode system
(NEC ART 250, Part H)
Ground clamps
Ground clamp
Electric service
equipment
