control of interchangeability and safety - Part 2: Lampholders
* IEC 60061-3, Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 3: Gauges
* IEC 60061-4, Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 4: Guidelines and general information

The United States standards for lamp sockets are published by ANSI and developed by NEMA, are generally harmonized with the relevant