Proposes the adoption of IEC 71-1:1993, with the exception of Appendix AA, to apply to three-phase a.c. systems having a highest voltage for equipment above 1 kV and specifies the procedure for the selection of the standard withstand voltages for the phase-to-earth, phase-to-phase and longitudinal insulation of the equipment and the installation of these systems. Copies of IEC 71-1:1993 may be purchased from or viewed at any Standards Australia office. Proposed as a Joint Australian/New Zealand Standard.