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Important Safety Instructions
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 pro-
vide some protection against voltage surges and built-
up static charges.
Section 810 of the National Electrical Code ANSI/
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.
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 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.
Antenna lead-in wire
Antenna discharge unit
(NEC Section 810-20)
Grounding conductors
(NEC Section 810-21)
Ground clamps
Power service grounding electrode
system (NEC ART 250, Part H)
Electric service
equipment
Ground clamp
