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.
B15 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.
B22 denotes the cap/holder fit as defined by IEC 60061-1, sheet 7004-10 and IEC 60061-2,
sheet 7005-10 with the correspondina gauges.