For grounded systems, electrical equipment must be installed to create what kind of circuit?

The installation of electrical equipment in grounded systems aims to create a low-impedance circuit. A low-impedance circuit is critical because it allows for a safe fault current path back to the ground, reducing the risk of electrical shock and equipment damage.

In the event of a fault, such as a short circuit, a low-impedance connection ensures that sufficient current flows to activate protective devices like circuit breakers or fuses quickly. This rapid disconnection of the faulty circuit helps prevent overheating, potential fires, or other hazards associated with electrical faults.

Additionally, grounding helps to stabilize voltage levels, which is crucial for the reliable operation of sensitive electronics. By ensuring low resistance in the ground path, the system effectively minimizes the risk of step and touch potentials, which are significant safety concerns in electrical installations.

This principle is foundational in electrical safety codes and standards, emphasizing the importance of low impedance in grounded power systems.