Best Practices for Educating Installers About NEC 690.12?

Understanding NEC 690.12

NEC 690.12 requires that all PV systems have a rapid shutdown capability to reduce electrical shock hazards during maintenance and repair. Installers should be aware that this means disconnecting the electrical power to the PV array when a worker is within 10 feet of the array. To facilitate this, many manufacturers offer modules with built-in rapid shutdown capabilities, but installers must ensure that they are properly installed and tested.

Hands-on Training and Testing

To ensure installers are proficient in installing and testing rapid shutdown systems, provide hands-on training sessions with actual equipment. This training should include practicing the shutdown process, understanding how to identify which devices require shutdown, and testing the system to ensure it meets NEC requirements. Installers should also practice testing the shutdown system to ensure it can be initiated quickly and safely. This hands-on training will help installers become more confident and competent in their ability to install and test rapid shutdown systems.

Ensuring Compliance with Disconnect Devices and Ground-Fault Protection

Installers must also ensure that the rapid shutdown systems they install meet the NEC requirements for disconnect devices and ground-fault protection. This includes selecting and installing disconnect devices that meet the 30-millisecond shutdown requirement, as well as ensuring that the system has ground-fault protection that meets the NEC requirements. Installers should also ensure that they are aware of any local or regional requirements that may be more stringent than the NEC requirements. By emphasizing the importance of rapid shutdown and providing installers with hands-on training and testing, you can ensure that they are well-equipped to meet the requirements of NEC 690.12 and provide safe and effective PV systems for your customers.