This Part of this British Standard gives two methods of determining the short-time electric strength (breakdown voltage) of insulating vulcanized rubber (including ebonite) and of solid plastics materials using a voltage with a nominal frequency of 50 Hz.Cross References:BS 148BS 903:Part A35BS 923BS 2782:Part 0BS 5324BS 5730ISO 291All current amendments available at time of purchase are included with the purchase of this document.