Lamp caps and holders together with gauges for the control of interchangeability and safety. Part 1 : Lamp caps.

This specification addresses the design and dimensional accuracy of lamp holders, socket outlets, and associated fixtures used in electrical installations. It defines the critical gauges required for verifying the interchangeability and safety of these components, ensuring that lighting elements can be securely fitted across different systems without risk of electrical fault or mechanical failure. The document establishes precise geometric tolerances for lampholders, focusing on their physical dimensions and structural integrity to prevent incompatibility during installation or operation. It serves as a technical reference for manufacturers and testing bodies to confirm that products adhere to established dimensional standards, thereby facilitating global trade and safety compliance. The content outlines measurement procedures and acceptance criteria specifically tailored for various lamp holder types, emphasizing consistency in manufacturing and rigorous quality control. By standardizing these elements, the text supports the reliable performance of electrical lighting systems and minimizes hazards associated with improper fitting. This foundational document remains essential for maintaining uniformity in the production and inspection of lighting hardware worldwide.