What is the primary purpose of grounding brushes on a generator?

The primary purpose of grounding brushes on a generator is to provide a safe path for stray currents. Grounding brushes serve a critical function in ensuring safety and stability in electrical systems. When stray currents or electrical faults occur, grounding brushes direct these currents safely to the ground, preventing potential hazards such as electrical shock, damage to equipment, or even fire. By ensuring that stray currents do not interfere with the normal operation of the generator, grounding brushes help maintain safe operating conditions and protect both personnel and equipment.

In contrast, enhancing power efficiency, increasing voltage output, and monitoring temperature are not the main roles of grounding brushes. While these aspects are important in the overall operation of generators, grounding brushes specifically focus on safety by managing stray electrical currents.