RCD Testing or Safety Switch Testing
What is an RCD?
A residual current device (RCD) is a electrical device which is designed to cut off power in the event of a fault on a electrical circuit. Installation of RCDs or safety switches is mandatory on all hostile environment circuits.
Further, In Accordance to Worksafe Occupational Safety and Health Regulations 2022 Regulation 3.60, all portable equipment must be protected against earth leakage current, in the form a portable RCDs.
What is RCD Testing?
RCD (Residual Current Device) testing involves inspecting and verifying the functionality of RCDs to ensure they provide adequate protection against electric shock and fire caused by electrical faults. RCDs work by quickly disconnecting the power supply when they detect a leakage current, such as when electricity flows through a person to the ground. Testing ensures that RCDs trip within the required time and at the specified current thresholds.
RCD testing typically includes two types:
Push Functionality Test: Verifies the RCD mechanism by simulating a fault. Users are encouraged to perform this test regularly (e.g., monthly) and depending on the environment require to be tested by a competent person either every 3 or 6 months. During all RCD testing, multiple other factor are assessed such as condition of the board, access to the board, number of RCD per breaker to ensure compliance is met to WHS regulations 2022.
Operating Time Test: A less common requirement, this measures the time it takes for the RCD to trip under fault conditions, performed using PAT testing equipment. Operating time testing in most business settings are not required.
Recent changes have recently occurred with the Department of Department of Energy, Mines, Industry Regulation and Safety (DEMIRS). As per regulations, injection testing & operating time testing at switchboards is no longer legal. It is illegal for a licensed electrician or any other worker to remove escutcheon to complete injection testing.
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