When calculating the rating for a fused disconnect, what must be included?

The correct approach when calculating the rating for a fused disconnect involves including the total load current and the service factor. This is essential because the total load current helps determine the amount of current that the disconnect will need to interrupt safely without causing damage or failure. The service factor accounts for any variations in load that may occur during normal operation, such as short-term overloads or unexpected surges, ensuring that the rated disconnect can handle these conditions.

By considering both the total load current and the service factor, you ensure that the disconnect is adequately rated for its intended use and can provide the necessary overcurrent protection while maintaining safety and reliability. This comprehensive calculation is crucial in electrical design and installation practices to prevent potential hazards associated with overcurrent situations.