Which of the following is NOT a requirement for a PV system disconnecting means?

The correct choice indicates that being waterproof is not a requirement for a photovoltaic (PV) system's disconnecting means under the National Electrical Code (NEC) Article 690. The primary focus for disconnecting means is on functionality and safety rather than being specifically waterproof.

Disconnecting means must be designed to allow for safe operation and maintenance of the PV system, ensuring that they can effectively isolate electrical components. However, the NEC does not explicitly state that these disconnects must be waterproof. Instead, the Code emphasizes features such as the ability to indicate voltage and the open/closed status of the disconnect, which are crucial for safety and operational clarity.

Moreover, the requirement for disconnects to be readily accessible is essential so that operators can easily turn off the system when maintenance or emergencies arise. Together, these requirements focus on ensuring that the disconnection process is safe and clear, but do not mandate that the disconnecting means be waterproof.