NFPA LiNK publication listing
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2026 NEC publication context
Service upgrades and load calculations
Article 220 supplies the load-calculation framework used when evaluating loads on a service. A service upgrade decision also depends on the existing equipment, service rules, utility coordination, and requirements of the authority having jurisdiction.
What a calculation can and cannot establish before an electrician evaluates a possible electrical service upgrade.
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
- What load calculation supports the proposed service size?
- What existing service, meter, grounding, and panel equipment will change?
- Which utility and permit-authority approvals are required before work starts?
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.