What is one reason for installing protective grounds?

Installing protective grounds is essential for ensuring safety in electrical work, particularly concerning the effects of electromagnetic induction. When electrical equipment operates, it can create varying levels of electromagnetic fields that can induce voltages in nearby conductive materials. This induction can pose a risk of electric shock or equipment malfunction.

By installing protective grounds, the intention is to create a low-resistance path to the earth for any fault currents. This grounding helps divert stray currents safely away from workers and equipment, thereby providing an essential layer of protection against electric shock and equipment damage caused by induction.

The other concepts presented, such as increasing power, improving machine efficiency, or reducing noise, do not directly relate to the primary function of protective grounding. Instead, protective grounding focuses on safety and mitigating electrical hazards, reflecting its critical importance in electrical systems.