What is the required rating for a service disconnect?

The required rating for a service disconnect must be at least equal to the calculated load that the electrical system is intended to handle. This ensures that the disconnect can effectively manage the maximum expected load without risk of overheating or failure. It is crucial for safety and functionality, as a disconnect that is rated lower than the calculated load might not adequately protect the system or prevent overload situations.

In practice, adhering to this requirement contributes to the overall integrity of the electrical installation and complies with relevant electrical codes and standards which mandate that service equipment must be rated to safely handle the load for which it is intended. This approach aligns with the goal of ensuring that all components in an electrical system work harmoniously and safely, preventing potential failures or hazards.