Quick Answer
While the National Electrical Code (NEC) 690.12 requirements for solar rapid shutdown are widely adopted, not all states enforce them. However, many states have their own building codes that align with the NEC, ensuring compliance. The level of enforcement varies from state to state.
State Building Code Adoption
The NEC is adopted by most states, either in its entirety or with modifications, but the level of adoption for NEC 690.12 varies. According to the International Code Council (ICC), 46 states and the District of Columbia have adopted the 2020 NEC, which includes the revised requirements for solar rapid shutdown in Article 690. However, 4 states (Alaska, Louisiana, South Carolina, and Wyoming) do not have a statewide building code, and 2 states (Arizona and New Hampshire) have a modified version of the NEC.
Local Enforcement and Jurisdiction
Local jurisdictions, such as counties and cities, often have their own building codes or ordinances that may supersede state building codes. Even if a state does not enforce NEC 690.12, a local jurisdiction may still require compliance with the NEC standard for solar installations. Installers should verify local building codes and regulations before commencing a project.
Industry Best Practices and Compliance
To ensure compliance with NEC 690.12 and local regulations, solar installers should follow industry best practices for rapid shutdown. This includes using certified rapid shutdown devices, following manufacturer instructions, and performing regular testing and inspections. Installers should also maintain records of compliance and be prepared to provide documentation to authorities having jurisdiction (AHJ) upon request.
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