What does the term "rCD" stand for in electrical installations?

The term "rCD" stands for Residual Current Device. This device is crucial in electrical installations as it is designed to protect against electric shock and to prevent electrical fires caused by earth faults. A Residual Current Device continuously monitors the electric current flowing through the live and neutral wires of an electrical circuit.

If it detects an imbalance between the outgoing and incoming current—indicating that some current is leaking through an unintended path, often through the ground—it will disconnect the supply very quickly. This rapid action significantly reduces the risk of electrical shock to individuals and helps to prevent potential fire hazards from electrical faults.

Understanding the role of a Residual Current Device is fundamental for safety in electrical installations. It plays a vital part in compliance with safety regulations and standards, ensuring that both residential and commercial environments are safe for electrical use.