IEC TR 60505:1975

Is a guide for Technical Committees when developing specifications for evaluation and identification of insulation systems in particular equipment. Defines the terms used; recommends a coding procedure for expressing compliance of insulation systems with specified service requirements, recommends preferred insulation system codes to minimize the number of functional tests; states general principles for the functional evaluation of insulation systems; recommends typical contents of functional test procedures of insulation systems. Has the status of a technical report.