The database has been updated following the publication of Amendment 51 to Part 1, Amendment 48 to Part 2 and Amendment 49 to part 3.

Contains the recommendations of the IEC in regard to lamp caps and holders in general use, together with relevant gauges, with the object of securing international interchangeability. The standard consists of four parts. Part 1: Lamp caps, Part 2: Lampholders, Part 3: Gauges, Part 4: Guidelines and general information. There are some 900 standard sheets in PDF format that can be accessed individually from the various indexes and through the search facility.