What is one of the most common grounding systems used for protection against accidental tal electrical shock? two-wire system three-wire system four-wire system

The correct answer is: three-wire system.The three-wire system is one of the most common grounding systems used for protection against accidental electrical shock. It consists of three wires: the live wire, the neutral wire, and the ground wire. The live wire carries the current to the device, the neutral wire carries the current back to the source, and the ground wire provides a path for the current to flow in the event of a fault. This system helps to prevent accidental electrical shock by ensuring that any excess current is safely grounded.