Recommended Practice for Electric Power Distribution for Industrial Plants
|Publication Date:||9 June 1998|
This publication provides a recommended practice for the electrical design of industrial facilities. It is likely to be of greatest value to the power-oriented engineer with limited industrial plant experience. It can also be an aid to all engineers responsible for the electrical design of industrial facilities. However, it is not intended as a replacement for the many excellent engineering texts and handbooks commonly in use, nor is it detailed enough to be a design manual. It should be considered a guide and general reference on electrical design for industrial plants and buildings.
Tables, charts, and other information that have been extracted from codes, standards, and other technical literature are included in this publication. Their inclusion is for illustrative purposes; where technical accuracy is important, the latest version of the referenced document should be consulted to assure use of complete, up-to-date, and accurate information.
It is important to establish, at the outset, the terms describing voltage classi˝cations. Table 1-1, adapted from IEEE Std 100-1992 [B5], indicates these voltage levels. The National Electrical Code, described in 1.5.1, uses the term over 600 volts generally to refer to what is known as high voltage. Many IEEE Power Engineering Society (PES) standards use the term high voltage to refer to any voltage higher than 1000. All nominal voltages are expressed in terms of root-mean-square (rms). For a detailed explanation of voltage terms, see Chapter 3. ANSI C84.1-1977 [B1] lists voltage class designations applicable to industrial and commercial buildings where medium voltage extends from 1000 V to 69 kV nominal.