Home page > EN > Warning light for conductor

Warning light for conductor


The expansion of the aerial navigation and the consequent increase of airports and aerodromes make necessary the use of safety marking devices.

In order to warn about the presence of a transmission line (wires and towers) during both daytime and night time, three types of devices are applied:

• The night warning light directly installed on the conductor,
• The day warning spherical marker for suspended wires and cables
• The obstruction light on towers.

These devices have been designed in accordance with the International Civil Aviation Organization (ICAO) and FAA standards Federal Aviation Administration (FAA–USA) standards.

Standards – international rules:

The standards and the regulations of aircraft warning markers are set up by the International Civil Aviation Organization (ICAO).

These rules are generally applied by the National Civil Aviation Administration of each country. But some countries use their own specifications (ex. USA with the FAA).

The aircraft warning recommendations for the overhead transmission lines are defined in two main standards:

• ICAO regulation - Annex 14 Airports Volume 1 Design and technical use of airports,

• FAA – Obstruction Marking and Lighting.

These standards state the pattern, cross-section, colour, intensity of the lights, as well as their location.

In order to prevent accidents due to aircraft or helicopters getting into contact with overhead conductors, day warning markers and night warning lights shall be used on transmission lines located in the neighbourhood of airports at the crossing of large valleys, estuaries, motorway or in mountainous areas, where advisable.

Site Map | Follow-up of the site's activity RSS 2.0