Equipment grounding conductors and bonding: a vital link in electrical system protection

Forty-First Annual Conference of Electrical Engineering Problems in the Rubber and Plastics Industries Pub Date : 1900-01-01 DOI:10.1109/RAPCON.1989.47716

G.J. Ockuly

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引用次数: 1

Abstract

Electrical equipment grounding and bonding conductors must be sized to withstand the maximum fault currents imposed during abnormal system conditions. It is noted that many low-voltage distribution systems do not contain adequately sized equipment grounding conductors and bonding jumpers, compromising personnel and system safety. It is emphasized that proper consideration of conductor withstand ratings provides improved equipment grounding, system reliability, and safety. Examples are presented which illustrate the engineering and design issues associated with proper selection and sizing of the equipment grounding conductor and associated bonding conductors. Particular consideration is given to insulated conductor withstand ratings, bare conductor withstand ratings, and conductor sizing using a current-limiting device. It is concluded that it is the responsibility of the design engineer to comply with the National Electrical Code requirements as well as to understand the nuances of proper electrical protection associated with component and equipment withstandability.<>

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设备接地导线和接键是电气系统保护的重要环节

电气设备接地和连接导体的尺寸必须能承受在系统异常情况下施加的最大故障电流。值得注意的是，许多低压配电系统没有包含足够尺寸的设备接地导体和连接跳线，危及人员和系统安全。正确考虑导体的额定耐压，可以提高设备的接地性能，提高系统的可靠性和安全性。举例说明了与设备接地导体和相关连接导体的正确选择和尺寸有关的工程和设计问题。特别要考虑绝缘导体的耐压额定值，裸导体的耐压额定值，以及使用限流装置的导体尺寸。结论是，设计工程师有责任遵守国家电气规范要求，并了解与组件和设备耐受性相关的适当电气保护的细微差别。

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Forty-First Annual Conference of Electrical Engineering Problems in the Rubber and Plastics Industries

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