When is ground-fault protection not required for a feeder disconnect?

Ground-fault protection is a critical safety feature designed to mitigate the risk of electrical shock or fire caused by ground faults. It is generally required for feeder disconnects in various installations, especially where the potential for ground faults exists. However, ground-fault protection may not be required under certain conditions, which is why the correct answer identifies that there are no exceptions specified for feeder disconnects regardless of the listed conditions.

In electrical safety regulations, ground-fault protection is mandated primarily for its role in safeguarding both personnel and equipment. The absence of exceptions ensures a consistent standard of safety across various environments. It underlines the principle that safety measures, like ground-fault protection, are necessary to prevent hazardous situations that may arise in any electrical installation.

Each of the other options suggests conditions that could lead to the assumption that ground-fault protection might not be necessary. However, regulations are structured to prioritize safety over assumptions based on conditions such as environmental factors, feeder capacity, or the number of circuits served. Thus, the unequivocal requirement for ground-fault protection reinforces the need for vigilance in electrical installations.