For which voltage should a disconnecting means be provided according to code?

The requirement for a disconnecting means is typically associated with safety guidelines established in the electrical code. In the context of the choices provided and the recognized standards, a disconnecting means is required for circuits operating at 60 volts and above for efficient operation and safety. This provision ensures that personnel can safely isolate electrical equipment from the power source during maintenance or in emergencies.

The choice of 60 volts aligns with the National Electrical Code (NEC), which states that a disconnecting means must be available for all circuits that pose a risk of arc flash or potential shock. Circuits under 60 volts can often be serviced safely without a disconnecting means, as they generally present less danger to individuals.

By focusing on the necessary voltage levels highlighted in the electrical standards, it becomes clear that a disconnecting means is essential at 60 volts to ensure compliance with safety protocols and properly manage electrical risks during maintenance operations.