Specifies requirements for disconnectors (isolators) and earthing switches designed for indoor and outdoor use at service frequencies up to and including 60 Hz in systems having rated voltages exceeding 1000 V. Applies also to the operating devices of these switches and to their auxiliary equipment. Includes service conditions, definitions, ratings, design and construction requirements, type and routine tests, guide to the selection of switching devices, information to be given with enquiries, tenders and orders, requirements for transport, storage, erection and maintenance, and a recommendation for quality control during manufacture.