Quick Answer
Grid-tied solar systems require inspections at various stages of installation, including pre-permit, pre-interconnection, and final inspections to ensure compliance with national electric code (NEC) standards and local regulations.
Pre-Permit Inspection
A pre-permit inspection is typically conducted before the installation begins. The inspector will verify that the site is suitable for the solar system, checking for any obstructions or conflicts with existing infrastructure. They will also review the system design and ensure it meets the necessary safety and performance standards.
Interconnection and Final Inspections
The pre-interconnection inspection is a critical step, where the inspector verifies that the solar system is properly installed and meets the interconnection requirements. This includes checking the electrical connections, wiring, and panel installation. A final inspection is then conducted to ensure the system is complete, safe, and operating as intended. Typically, the final inspection includes a review of the system’s performance, safety features, and compliance with local regulations.
NEC and Local Code Compliance
Grid-tied solar systems must comply with national electric code (NEC) standards, as well as local regulations and building codes. Inspectors will verify that the system meets the necessary requirements, including grounding and bonding, electrical panel installation, and surge protection. A typical NEC-compliant grid-tied solar system will also include a main disconnect, a ground fault circuit interrupter (GFCI), and a lightning arrestor.
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