NEC Adoption by State 2024

Interactive National Electrical Code Map for All 50 States

Find which version of the National Electrical Code (NEC) your state has adopted. Essential reference for electricians, electrical contractors, and engineers working across state lines.

✓ NEC 2023 Adoption Status✓ All 50 States + DC
NEC Version Legend
NEC 2008
NEC 2017
NEC 2020
NEC 2023
NEC unknown

NEC Adoption by State

Browse all 50 states + DC. Click a state to jump to its anchor.

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National Electrical Code Adoption Guide

Understanding NEC Adoption by State

The National Electrical Code (NEC) is updated every three years by the National Fire Protection Association (NFPA). However, each state adopts these updates on their own timeline, creating a complex landscape of electrical code requirements across the United States.

Our interactive map shows which version of the NEC each state has officially adopted, helping electrical professionals ensure compliance when working across state lines.

Why NEC Version Matters

  • •Safety Requirements: Each NEC version introduces new safety standards and requirements
  • •Code Compliance: Using the wrong NEC version can result in failed inspections
  • •Legal Protection: Following adopted codes protects against liability issues
  • •Professional Standards: Stay current with industry best practices

NEC Version Breakdown

NEC 2023

Latest version with cutting-edge safety standards

NEC 2020

Most widely adopted current standard

NEC 2017

Transitional version still in use

NEC 2008

Legacy version requiring updates

Frequently Asked Questions

How often is the National Electrical Code updated?

The NEC is updated every three years. The most recent versions are 2023, 2020, 2017, and 2014.

Do all states adopt the latest NEC version immediately?

No, each state adopts NEC updates on their own timeline. Some states adopt new versions quickly, while others may take several years.