A working safety switch or RCD can offer protection from malfunctioning electrical appliances that might otherwise cause short circuits or a devastating electrical shock. Here’s what you need to know about RCDs and how they are tested and tagged.
An RCD (Residual Current Device) is a safety device used in electrical systems to protect against electric shock. In layman’s terms, you can call it a safety switch. It works by monitoring the flow of electrical current in a circuit and detecting any imbalance, which could indicate a fault in the system. If an imbalance is detected, the RCD immediately cuts off the electrical supply, preventing electrical shock or fire hazards.
RCDs are commonly used in residential and commercial electrical systems, and are required by law in many countries. They provide an additional layer of safety for electrical systems and can protect against electrical hazards caused by faults in electrical appliances, damaged wiring, and other electrical issues. They can be installed in the consumer unit, also known as the electrical distribution board, or integrated into electrical outlets and switches. They are available in different types and ratings, and it is important to select the right type of RCD for the specific electrical system.