IEC 60061-3:1969/AMD55:2018 defines Amendment 55 to the lamp caps and holders series, focused on gauges used to control interchangeability and safety. For engineering teams and procurement reviewers, it is a relevant technical document when assessing whether lamp-cap-related components align with the required dimensional control and fit expectations in product evaluation, testing workflows, and compliance preparation. As an amendment to IEC 60061-3:1969, it should be read as a supporting update to the parent reference rather than as a standalone specification.

Overview of IEC 60061-3:1969/AMD55:2018

This amendment updates the gauges part of the lamp caps and holders documentation, which is used to support interchangeability and safety verification. IEC 60061-3:1969/AMD55:2018 is therefore most relevant where technical review depends on gauge-based control of physical compatibility, dimensional checking, and documented evaluation. In quality workflows, it may be used alongside the parent document to support conformity assessment, technical validation, and consistent interpretation of lamp-cap and holder interfaces across manufacturing and test activities.

Compliance applications of IEC 60061-3:1969/AMD55:2018

Organizations may consult this amendment during component qualification, incoming inspection, laboratory evaluation, and regulatory preparation for lighting-related electrical equipment. It is especially useful where gauge selection, interchangeability checks, and fit verification affect production consistency or certification evidence. IEC 60061-3:1969/AMD55:2018 can also support procurement decisions by clarifying which technical reference applies when verifying compatibility between lamp caps, holders, and the gauges used in testing workflows.

Importance of compliance with IEC 60061-3:1969/AMD55:2018

Using the correct amendment helps reduce risk in engineering documentation and conformity assessment by keeping gauge requirements aligned with the parent reference. That matters for safety, interoperability, and reproducible testing, especially when dimensional control influences whether a lamp cap or holder is acceptable for use. IEC 60061-3:1969/AMD55:2018 can therefore support more reliable verification activities, clearer technical assessment, and stronger quality assurance in procurement and approval processes.

• Supports gauge-based control for lamp caps and holders referenced in the parent series
• Helps maintain interchangeability and safety-focused dimensional verification
• Useful for conformity assessment, inspection planning, and technical validation
• Relevant to procurement and documentation where the correct amendment status matters