4
Warnings and Precautions
Outdoor Antenna Safety Instructions
Antenna lead-in wire
Antenna discharge unit
(NEC section 810-20)
Grounding conductors
(NEC section 810-20)
Ground clamps
Power service grounding
(NEC Art250 part H)
Ground clamps
Electric service
equipment
NEC : National Electrical code
If an outdoor antenna is connected, follow the precautions below:
EXAMPLE OF OUTDOOR ANTENNA GROUNDING
Section 810 of National Electrical Code (NEC) 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 for
the grounding electrode.
▪ An outdoor antenna should not be located in any area where it could come in contact with
overhead power lines, or any other electric light or power circuits.
▪ When installing an outdoor antenna system, extreme caution should be taken to prevent
contact with power lines. Direct contact with power lines may be fatal and should be avoided
at all costs.
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