Electrical Grounding Quiz

Grounding Systems and Electrical Safety

• The Equipment Grounding Conductor (EGC) is a conductor that provides a path to ground for fault currents and ensures the safe grounding of electrical equipment.

High-Resistance Grounded Systems

• A High-Resistance Grounded system is designed to limit the ground fault current to a very low value, typically 5A or less, to reduce the risk of electrical shock and equipment damage.

Defining Grounding Systems

• A Grounding System is defined by the connection between the electrical circuit and the earth, which provides a safe path for fault currents and helps prevent electrical shock.

Per-Phase Charging Current

• The Per-phase Charging Current (Ico) is related to the capacitive coupling between the phase conductors and the earth, which can cause currents to flow to ground even when there is no fault.

Effective Grounding

• A system is considered Effectively Grounded if the ratio of the available ground fault current to the available three-phase fault current is 95% or more, ensuring that the ground fault current is sufficient to operate protective devices.