Problems of revising AIEE standard number 1

A revision of AIEE Standard Number 1, “General Principles upon which Temperature Limits Are Based in the Rating of Electric Machines and Other Equipment,” was necessitated because of the present use of many new materials and the fact that past appraisals of materials were incomplete. A general plan for such a revision, as well as proposals for overcoming immediate difficulties in the present standard, has been formulated by the working groups of AIEE Standard Co-ordinating Committee Number 4 and are presented in this article.