Some Significant Effects of the New National Electrical Code on Our Industries

The increased concern for human safety is one of several factors which makes the National Electrical Code increasingly important to engineers involved in plant electrical systems. New requirements are extending into areas not previously covered by the Code. This paper discusses some selected major changes which are of most interest to industries using large amounts of power, and some changes which are apt to be controversial. Included are: ground-fault protection, service entrance arrangements, autotransformers, transformer primary and secondary protection, separately-derived systems, and new product possibilities.