Section 237: Electrical system design

(1) In case of a runway meant for use in runway visual range conditions less than a value of 550m, the electrical systems for the power supply, lighting and control of the lighting systems set out in table 15 shall be designed so that an equipment failure will not leave the pilot with inadequate visual guidance or misleading information. (2) Where the secondary power supply of an aerodrome is provided by the use of duplicate feeders, such supplies shall be physically and electrically separate so as to achieve the required level of availability and independence. (3) Where a runway forming part of a standard taxi-route is provided with runway lighting and taxiway lighting, the lighting systems shall be interlocked to prevent the possibility of simultaneous operation of both forms of lighting.