Which components must comply with the requirements for controlled conductors part of a rapid shutdown in a PV system?

The answer indicating that both the PV system DC circuits and inverter output circuits must comply with the requirements for controlled conductors in a rapid shutdown scenario is based on critical safety measures mandated by the National Electrical Code (NEC), specifically Article 690.

Rapid shutdown requirements are designed to minimize risk in the event of an emergency, enabling first responders to safely approach a building with a photovoltaic (PV) system installed. The rationale for including both the PV system DC circuits and inverter output circuits is that these components can pose a significant hazard by remaining energized even after the shutdown has been initiated. By ensuring compliance for both sections of the system, the NEC aims to provide a comprehensive approach to safety, addressing potential risks throughout the PV system.

The inclusion of DC circuits ensures that the portion of the system directly connected to the solar panels—where electrical energy generation occurs—becomes non-energized during shutdown. The inverter output circuits are equally important because they transmit electricity from the inverter to the service equipment or the grid; if these circuits remain energized, they can create dangerous conditions during a shutdown need.

It is important to ensure all critical sections of the circuit are addressed to mitigate risks associated with voltage and the potential for electrocution, which is why this answer correctly reflects