The State of Oklahoma has officially adopted the 2020 NEC as of September 14, 2022. It is the statewide minimum code for enforcement.
North Carolina has adopted the NEC 2020 as part of their North Carolina State Electrical Code effective November 1, 2021.
The NEC is revised every three years and the code adoption process begins anew. Here is a comprehensive overview of electrical code adoption in the US in 2020.
The Georgia State Codes Advisory Committee (SCAC) has unanimously voted to recommend the adoption of the 2020 NEC effective date of January 1, 2021.
The Massachusetts Board of Fire Prevention Regulations (BFPR) met on December 5, 2019 and voted to begin adoption and enforcement of the NEC-2020 as of January 1, 2020.