Replacement: This section of IEC 1084-2 specifies requirements for cable trunking and ducting systems intended for mounting on walls or ceilings. The cable trunking and ducting systems accommodate and, where necessary, segregate conductors, cables or cords and other electrical equipment. The systems are intended to be mounted directly on walls or ceilings, flush or semiflush, or indirectly on walls or ceilings or on structures away from walls or ceilings. Cable trunking and ducting systems are hereinafter called CT/DS. This standard does not apply to conduits, cable trays or cable ladders, electrical accessories e.g. switches, socket-outlets or the like, for which other IEC standards apply, or current carrying parts within the system. The different types of systems are shown in figure 101 and described in annex A.