Lamp caps and holders together with gauges for the control of interchangeability and safety; part 2: lampholders; supplement 10 to IEC 61-2(1969)

This technical document establishes comprehensive measurement tools specifically designed for lamp caps and lampholders, focusing on the second part which addresses lampholders. It defines precise gauges utilized to verify the interchangeability and safety characteristics of these electrical components. The specifications detail the geometric dimensions and tolerances necessary to ensure that different lamp caps fit securely and correctly into various lampholders without causing electrical faults or mechanical failures. By standardizing these critical interfaces, the document supports the manufacturing of compatible lighting equipment across international markets. The gauges described are essential for manufacturers and quality control laboratories to validate that production meets agreed-upon safety and performance criteria. Adherence to these measurement protocols helps prevent issues related to poor connections, overheating, or instability in lighting systems. The content serves as a foundational reference for technical compliance, ensuring that the physical interface between lamps and their sockets maintains reliability and safety for end users in diverse electrical environments.