Quick Hits

Episode 13 — Services, Busways, Motors, Generators, Batteries, and the Grounded Conductor

Covers: 240.21(D)–(H), 240.22

Hook: A quick tour through the rest of the special conductor categories — then the one rule that protects your neutral from ever getting fused.

Slide 2: Service conductors follow 230.91 for their OCPD location. Busway taps follow 368.17, motor circuit taps follow 430.28/430.53, generator terminal conductors sized per 445.13 can rely on the generator's own overload device per 445.12, and battery conductors just need overcurrent protection as close as practical to the battery terminals — even inside a classified location if needed.

Slide 3: 240.22 is simple but important: no OCPD gets connected in series with an intentionally grounded conductor — unless that device opens every conductor of the circuit simultaneously (no independent-operating poles), or it's required for motor overload protection under 430.36/430.37.

Quiz: Can a single-pole breaker be installed in a grounded (neutral) conductor?
Answer: Not unless it opens all conductors of the circuit simultaneously, or it's for specific motor overload protection.

CTA: Follow — where OCPDs physically have to be located on the premises is next.

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