scope:

This standard applies to lampholders with Edison thread E14, E27 and E40, designed for connection to the supply of lamps and semi-luminaires only. It also applies to switched-lampholders for use in a.c. circuits only, where the working voltage does not exceed 250 V r.m.s. This standard also applies to lampholders with Edison thread E10 designed for connection to the supply of series-connected lamps with a rated voltage not exceeding 60V, to be used indoors or outdoors. As far as it resonably applies, this standard also covers lampholders other than lampholders with Edison thread designed for connection of series-connected lamps to the supply. As far as it reasonably applies, the standard also covers lampholders which are, wholly or partly integral with a luminaire or intended to be built into appliances. Independent lampholders, e.g. backplate lampholders, not specifically intended for building-in, are also tested as luminaires.