Electrical · E-PCG62

Typical Grounding and Bonding Detail

Materials

Concrete Reinforced Concrete Steel Metal (misc.)

Elements

Foundations / Footings Entrances Connections / Plates Reinforcing

About this detail

Electrical service grounding and bonding diagram showing connections between service entrance equipment, transformers, panels, and grounding electrodes. The system utilizes a main ground bus, neutral bus, and phase bus configured with continuous ground conductors without splices. Ground bushings are required on all conduits connected to panelboards and transformers, with conduit bushings bonded directly to the ground bus. Bonding jumpers connect the switchboard enclosure and building steel per NEC 250 requirements. Additional electrodes include a concrete-encased electrode connected via a bare copper conductor to foundation rebar, a copper-clad grounding rod, and a connection to the main interior cold water service using a sized copper conductor.

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