This International Standard states the technical and dimensional requirements for lampholders for tubular fluorescent lamps and for starterholders@ and the methods of test to be used in determining the safety and the fit of the lamps in the lampholders and the starters in the starterholders. This standard covers independent lampholders and lampholders for building-in@ used with tubular fluorescent lamps provided with caps as listed in annex A@ and independent starterholders and starterholders for building-in@ used with starters in accordance with IEC 60155@ intended for use in a.c. circuits where the working voltage does not exceed 1 000 V r.m.s. This standard also covers lampholders for single-capped tubular fluorescent lamps integrated in an outer shell and dome similar to Edison screw lampholders (e.g. for G23 and G24 capped lamps). Such lampholders are tested in accordance with the following clauses and subclauses of IEC 60238: 8.4; 8.5; 8.6; 9.3; 10.7; 11; 12.2; 12.5; 12.6; 12.7; 13; 15.3; 15.4; 15.5 and 15.9. Lampholders designed with a barrel thread for shade holder rings should comply with IEC 60399.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 are to 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. This standard also applies@ as far as is reasonable@ to lampholders and starterholders other than the types explicitly mentioned above and to lamp connectors. Where the term "holder" is used in the standard@ both lampholders and starterholders are intended.?