EN 60061-3:1993/A20:1998

Overview

EN 60061-3:1993/A20:1998 (identical with IEC 60061-3:1969/A20:1998) is the part of the EN/IEC 60061 series that covers gauges used to control interchangeability and safety of lamp caps and holders. The document specifies the purpose and use of physical gauges for verifying that lamp caps (bases) and holders (sockets) comply with the dimensional and fit requirements needed for safe, interchangeable operation across lamps and luminaires. For full, up‑to‑date technical content you need to subscribe to the IEC 60061 database.

Key Topics

• Scope and purpose - role of gauges in ensuring interchangeability and electrical safety between lamp caps and holders.
• Gauge types and descriptions - definitions of the different gauges used to check fit, clearances and engagement between lamp caps and holders.
• Verification procedures - how to use gauges in production and inspection to confirm compliance (visual/fit checks, insertion/removal tests).
• Dimensional control - the relationship of gauge criteria to cap and holder dimensions and tolerances (used to verify manufacturing conformity).
• Safety-related checks - aspects of gauges that help verify safe mechanical and electrical connection (contact alignment, mechanical retention, insulation clearances).
• Documentation and marking - recommended record‑keeping and identification of gauges for traceability.

(Note: this summary does not reproduce the standard’s exact tables, dimensions or test methods - consult the official standard for detailed technical requirements.)

Applications

• Quality control and inspection in lighting component manufacturing (lamp cap and holder production).
• Incoming inspection for distributors and OEMs to confirm purchased lamps and holders meet interchangeability requirements.
• Type testing and conformity assessment by test laboratories verifying compliance with EN/IEC 60061 series.
• Product design validation for lamp and luminaire engineers ensuring compatibility between sockets and lamp caps.
• Regulatory and procurement specifications where guaranteed interchangeability and safety are required.

Who uses this standard

• Lamp, bulb and lamp‑holder manufacturers
• Lighting fixture (luminaire) designers and OEMs
• Conformity assessment bodies and test laboratories
• Procurement and quality assurance teams in lighting supply chains
• Standards committees and regulatory authorities

Related standards

• EN/IEC 60061 (the complete series covering lamp caps, holders and gauges)
• Other parts of IEC 60061 (Parts 1, 2, 4, etc.) that cover designation, dimensioning and safety requirements for specific lamp families

For precise dimensions, gauge drawings, and formal test procedures, consult the official IEC/CLC publication or subscribe to the IEC 60061 database. Keywords: EN 60061-3, IEC 60061, lamp caps, lamp holders, gauges, interchangeability, lamp gauges, lighting standards, socket compatibility.