Intelbras ELC 5002 - Safety Warnings and Overhead Line Distances

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» Intersections with overhead power lines should be avoided whenever possible. If such crossing cannot
be avoided, it should be done below the power line and as close as possible so as to be perpendicular
to the line.
» If the high voltage conductors and electric security fence wires are installed close to overhead power
lines, the separation distances must not be less than those indicated in the following table:
Electric power line voltage (V) Separation distance (m)
≤1.000 3
>1.000 and ≤33.000 4
>33.000 8
» If high voltage cables and electric fence wires are installed close to overhead power lines, their height
from the ground must not exceed 3 m. This height applies to either side of the orthogonal projection
of the outermost conductors of the electrical power line on the ground surface; for a distance of 2 m
for lines operating at rated voltage not exceeding 1000 V, and 15 m for electric power lines operating
at rated voltage exceeding 1000 V.
» A spacing of 2.5 m must be maintained between uninsulated conductors or between uninsulated high
voltage cables of electric fence energized by separate electriers. This spacing may be smaller where
high voltage conductors or cables covered by insulating jackets consist of cables with insulation for
at least 10 kV. This requirement does not apply where these energized conductors are separated by a
physical barrier that does not have any openings greater than 50 mm.
» A vertical distance of not less than 2 m must be maintained between conductors energized by pulses
from different electriers.
» The installation of the electric fence must be identied by warning signs, installed in such a way that
they are evident and legible from the protected area and the public access area.
» Each side of the electric fence must have at least one warning sign. There must be signs at each gate,
at each access point, at intervals not exceeding 10 m and adjacent to each sign related to chemical
hazards, for information regarding emergency services.
» Any part of an electric fence installed along a public road or highway must be identied at regular
intervals by means of warning signs that are securely afxed to the fence support rods, or securely
attached to the fence wires.
» The warning signs must be at least 100 mm × 200 mm, have a yellow background and the following
inscription in black: CAUTION: ELECTRIC FENCE, as indicated in item BB.1 of annex BB of the ABNT
NBR IEC 60335 standard -2-76.
» The inscription must be legibly and durably identied, inserted on both sides of the warning plate and
have a height of at least 25 mm.
» It must be ensured that all auxiliary equipment powered by the electrical network, connected to the
electric fence circuit, have a degree of isolation between the fence circuit and the electrical network
equivalent to that assigned to the electrier.
» Mains wiring must not use the same conduits/ducts used by the signal cables associated with the
electric fence installation.
» Weather protection must be provided for auxiliary equipment unless this equipment is certied by
the manufacturer to be suitable for use outdoors and has a minimum degree of protection IPX4.
» The installations must comply with the ABNT NBR IEC 60335-2-76 standard.