This Standard specifies requirements for rigid, non-threadable, profile-wall, smooth-bore conduits and fittings of insulating materials which are used for the protection of cables in an electrical installation and which have designated sizes of 90mm to 150 mm.This Standard is to be read in conjunction with AS/NZS 2053.1. The requirements of Part 1 apply except where they are added to, or modified by, this Standard.