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An RCD (Residual Current Device) is a safety device that disconnects a circuit when it detects an imbalance of the electric current. If the RCD detects an imbalance in the electrical current, indicating a leakage to earth, it immediately cuts the electricity supply to prevent electrocution. RCDs are extremely sensitive, disconnecting within 10 to 50 milliseconds of detecting a leakage current. RCDs are required to be fitted at the meter box (main switchboard) or distribution board for the residence. For more information on RCD’s please click here. If you would like our qualified electrician to install an RCD on your premises or check an existing RCD please contact us on 0415 854 373.