UDC 621.3.032.8:006.78 : 621.327.534.2                          ETD 23

Reaffirmed 2017

1. Scope

1.1 This standard (Part III) covers the dimensions of bayonet B22d-3 (90º/135º) 25×26 and edison E 27/27, E 40/41 and E40/45 caps for high-pressure mercury vapour lamps.