1. Residual current devices (RCDs) are installed at the branch circuit outlet, while residual current devices (RCDs) are installed at each appliance terminal, making them end-user installations. This makes installation and maintenance more convenient.
2. Difference in Leakage Conditions: When a residual current device (RCD) leaks current, because it's installed at the branch circuit outlet, the entire branch circuit will lose power, leaving the house without electricity. However, when an appliance or wire on a RCD leaks current, only that branch circuit will be de-energized, and the appliance will not function.
3. Difference in Wiring Protection: RCDs only protect the live wire, while RCDs protect both the live and neutral wires.
Installing RCDs in low-voltage power distribution systems is an effective measure to prevent electric shock accidents and to prevent electrical fires and equipment damage caused by leakage. However, installing an RCD does not guarantee absolute safety. Prevention should still be the primary focus during operation, and other technical measures to prevent electric shock and equipment damage should be implemented simultaneously.
