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Important Safety Instructions
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.
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 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
2b
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