UDC 621.3.032.8:621.753.3:621.327.534.2                          ETD 23

Reaffirmed 2017

1. Scope

1.1 This standard (Part IV) specifies the essential dimensions of Go and No-Go gauges for bayonet B22d-3 (90°/135°)/25x26 and edison E27 and E40 caps on lamps for use on high - pressure mercury vapour lamps. The standard also specifies the methodfor of testing for dimensions of the lamp caps with these gauges.