What is required for disconnecting ac PV modules from circuits?

The requirement for disconnecting AC PV modules from circuits is centered on the concept of being able to effectively disconnect the power source from the electrical system. This function is crucial for the safety and maintenance of photovoltaic systems.

Being able to disconnect means that there must be a reliable mechanism in place that allows operators to safely interrupt the electrical connection between the PV modules and the rest of the system. This is particularly important in emergency situations, during maintenance, or when servicing the modules. The disconnecting means must be easily accessible and recognizable to ensure that it can be operated by qualified personnel without uncertainty or delay.

While the ability to isolate or ground components, or to fuse for overcurrent protection, are important aspects of electrical safety and adherence to the National Electrical Code, they do not directly fulfill the specific requirement for disconnecting AC PV modules. The main focus here is on the functionality that allows an operator to cut off the power supply, which is why the requirement emphasizes the capability to disconnect.