GROUNDING FOR EMERGENCY AND STANDBY POWER-SYSTEMS

The basic functions of system and equipment grounding is presented, fundamental grounding requirements for service-supplied and separately derived power systems which operate at 600 V or less are discussed. Several grounding arrangements for alternate power supplies are also discussed and graphically illustrated. The grounding requirements are primarily derived from the National Electrical Code, NFPA No. 70–1978. The paper is intended to be the basis for a new chapter on grounding in the next edition of IEEE Standard 446–1974, Recommended Practice for Emergency and Standby Power Systems. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.