GB/T 1483.1-2008

This standard specifies the design, dimensions, and tolerances of gauges used to verify the interchangeability and safety of screw-type lamp caps (such as Edison bases) and their corresponding holders. It is applied in the manufacturing and quality inspection of lighting products, ensuring that screw caps and holders from different producers fit correctly and maintain electrical contact without risk of short circuits or mechanical failure. The standard is critical for compliance testing in the lighting industry, particularly for incandescent, LED, and compact fluorescent lamps using E-series bases.