Is applicable to alternating current and direct current bushings for rated voltages above 52 kV, mounted on transformers, other apparatus of buildings. It is accepted that for bushings for rated voltages less than or equal to 52 kV, due to their characteristics (resonance frequency greater than 25 Hz) seismic qualification is not required. Has the status of a technical report type 2. This consolidated version consists of the first edition (1996) and its amendment 1 (2000). Therefore, no need to order amendment in addition to this publication.