Which system is meant to prevent unintended energization of sources that are not intended to be powered?

The system designed to prevent unintended energization of sources that are not meant to be powered is represented by backfeeding prevention provisions. These provisions are critical in ensuring that power sources, especially in configurations where multiple power sources can be connected, do not inadvertently send electrical current back through systems that could lead to dangerous situations or equipment damage.

Backfeeding can occur when there are multiple energy sources, such as generators and shore power, connected simultaneously without appropriate management. This can result in one source unintentionally energizing circuits rather than the intended supply, creating risks for both personnel and equipment. By implementing backfeeding prevention provisions, systems are equipped with measures such as interlocks, transfer switches, or devices that physically disconnect or isolate sources during switchovers, thereby ensuring safe operation and preventing backfeed conditions.

In contrast, power surge protectors are designed to manage voltage spikes, load sharing systems manage the distribution of load across multiple sources to optimize performance, and short circuit alarms monitor for circuit faults, but none of these directly address the issue of preventing unintentional power energization in a way that safeguards against backfeeding.