Can a rcd work without oproper earthing?

A Residual Current Device (RCD) can function without proper earthing, but its effectiveness and safety are compromised. RCDs rely on detecting imbalances in the electrical current, and without a proper earth connection, there’s a risk of failure to trip in the event of a fault. This could lead to hazardous situations, such as electric shocks or fires. Therefore, proper earthing is essential for RCDs to operate safely and reliably.