2017 NEC Code Adoption

Currently, 5 states are operating under the 2017 NEC editions. Explore the complete map of states using this version and their respective effective dates.

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Quick Info

  • ▶NFPA updates the NEC every 3 years.
  • ▶Effective dates vary by state commission.
  • ▶Check local amendments for specifics.

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Frequently Asked Questions

?Which states have adopted the 2017 NEC Code Adoption?

Currently, the following **5 states** have adopted the 2017 edition: Nevada, New York, Pennsylvania, Tennessee, Wisconsin.

?Is the 2017 NEC the latest edition?

No, the 2017 edition has since been superseded by newer editions like the 2023 NEC.

?Why are some states still using older versions like 2017?

The adoption process involves legislative review, public comment, and often training for inspectors and contractors. This process can take several years, leading some states to lag behind the NFPA publication cycle.

How NEC Adoption Works

The National Electrical Code (NEC), also known as NFPA 70, is a regional standard for the safe installation of electrical wiring and equipment in the United States. While the National Fire Protection Association (NFPA) updates the code every three years (e.g., 2017, 2020, 2023), adoption is handled at the state or local level.

Statewide Adoption

Most states have a central Building Code Commission that mandates a specific version of the NEC for all jurisdictions within the state.

Local Control

States like Arizona, Illinois, and Missouri allow local counties or cities to decide which NEC version to adopt and enforce.

Amendment Variations

States often adopt the NEC with specific "amendments" or exceptions to suit local environmental or industrial needs.

Cycle Skipping

Due to legislative delays or administrative slow-down, some states may skip an entire 3-year cycle before updating.

Disclaimer: This data is for informational purposes only. Always verify code requirements with your local AHJ (Authority Having Jurisdiction).