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NEC Article 250 covers all aspects of grounding and bonding for electrical systems, establishing requirements for system grounding, equipment grounding, grounding electrode systems, and bonding to ensure electrical safety and proper fault current paths.
Article 250 is the foundation of electrical safety, establishing the grounding and bonding requirements that protect people and property. System grounding connects one conductor of the electrical system to earth, providing a reference point and limiting voltages during normal operation and fault conditions. Equipment grounding provides a low-impedance path for fault currents to return to the source, enabling overcurrent devices to operate and clear faults quickly. The grounding electrode system connects the electrical system to earth through various electrodes like ground rods, water pipes, and concrete-encased electrodes.
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