This International Standard applies to bayonet lampholders B15d and B22d for connection of lamps and semi-luminaires to a supply voltage of 250 V. This standard also covers lampholders which are integral with a luminaire or intended to be built into appliances. It covers the requirements for the lampholder only. For all other requirements@ such as protection against electric shock in the area of the terminals@ the requirements of the relevant appliance standard shall be observed and tested after building into the appropriate equipment@ when that equipment is tested according to its own standard. Lampholders for use by luminaire manufacturers only are not for retail sale. NOTE Where lampholders are used in luminaires@ their maximum operating temperatures are specified in IEC 60598-1. B15d denotes the cap/holder fit as defined by IEC 60061-1@ sheet 7004-11 and IEC 60061-2@ sheet 7005-16 with the corresponding gauges. B22d denotes the cap/holder fit as defined by IEC 60061-1@ sheet 7004-10 and IEC 60061-2@ sheet 7005-10 with the corresponding gauges.