Is it permitted for the ratings of all overcurrent devices connected to power production sources to exceed the rating of the service?

When it comes to the ratings of overcurrent devices connected to power production sources, they must not exceed the service rating. Service ratings are established to ensure safety and reliability of the electrical system. Overcurrent devices, such as circuit breakers and fuses, are designed to protect the electrical system from excessive current that can cause overheating, fire, or damage to equipment. If the ratings of these devices exceed the service rating, there is a risk that they may not trip adequately during an overcurrent condition, potentially leading to hazardous situations.

By adhering to the service rating, the electrical system maintains a level of protection and compliance with electrical codes and standards. This ensures that the installed components can handle the operational demands without compromising safety. This principle applies universally, irrespective of whether the power production sources are conventional or renewable. Thus, having overcurrent device ratings that exceed the service rating is not permitted, ensuring functional safety and system integrity.