NFPA LiNK publication listing
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2026 NEC publication context
NEC service and feeder load calculations
Article 220 covers branch-circuit, feeder, and service load calculations. A contractor or designer uses the applicable calculation method with the loads and conditions at the property.
Why a service or feeder decision needs an Article 220 load calculation rather than a calculator result alone.
Planning reference only. Power Totals is not an electrical contractor, engineering firm, inspection service, permit authority, or code-book substitute. Code adoption and amendments vary. Confirm the adopted edition and project requirements with the authority having jurisdiction.
What to confirm for the job
- Which Article 220 calculation method applies to this property?
- Which existing and proposed loads were included?
- Does the permit authority require a load-calculation worksheet with the application?
Official sources
NFPA 70 2026 revision-cycle public report for Article 220
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Local permit contacts
The current dataset does not contain sourced state-by-state NEC adoption records. These links go only to states where Power Totals has at least one checked local permit-authority link.