A bushing must be designed to withstand the electrical field strength produced in the insulation, when any earthed material is present. Cable bushings are fit onto through holes for wiring to prevent damage to power cables and cords from rough edges. In electric power, a bushing is a hollow electrical insulator that allows an electrical conductor to pass safely through a conducting barrier, such as the case of a transformer or circuit breaker, without making electrical contact with it. Bushings are integral and critical components for the reliable delivery of electrical power, from the power plants and distributed energy resources, through the transmission and distribution networks, across the substations and equipment that allow switching and balancing of electricity, and.
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