This document specifies standard aspect ratios for logarithmic or level characteristics expressed in decibels versus a logarithmic frequency axis and ranges for the radius of polar diagrams of level. Applications include hard copy printouts, electronic files (e.g., PDF files),scientific publications, screen displays in computer programs and apps, as well as graphs in standards. Informative examples […]

This International Standard applies to lampholders with Edison thread E1 4, E27 and E40,designed for connection to the supply of lamps and semi-luminaires 1 only. It also applies to switched-lampholders for use in AC circuits only, where the working voltage does not exceed 250 V r.m.s. This standard also applies to lampholders with Edison thread

IEC 60172:2020 specifies, in accordance with the provisions of IEC 60216-1, a method for evaluating the temperature index of enamelled wire, varnished or unvarnished with an impregnating agent, and of tape wrapped round and rectangular wire, in air at atmospheric pressure by periodically monitoring changes in response to AC proof voltage tests. This procedure does

This document specifies the method of test for the determination of the proof and comparative tracking indices of solid insulating materials on pieces taken from parts of equipment and on plaques of material using alternating voltage. This document provides a procedure for the determination of erosion when required. NOTE 1 The proof tracking index is

This document applies to analogue audio disk records and the corresponding professional and domestic reproducing equipment. It excludes amplifiers and loudspeakers, methods of measurement for which can be found in IEC 60268-3，IEC 60268-5，IEC 60268-21 and IEC 60268-221 . This document specifies the characteristics that are necessary to ensure compatibility between analogue audio disk records and