Installation of 30ma RCDs
RCDs with a minimum residual current of 30 mA are the most common type, and as per ASNZ 3000 it is now a requirement to install RCDs to all final subcircuits rated 32 A or less, for all socket-outlets, lighting, direct connected handheld equipment, and direct connected equipment that presents an increased risk of electric shock. Our expert electricians can advise on your situation.
Installation of 10ma RCDs
10mA units have an increased response rate and recommended for installation in high-risk areas such as childcare centres, hospitals, aged care facilities, and medical precincts providing additional protection to human life.
In cases where units are nuisance tripping, our electricians will analyse the load to calculate the total leakage of all connected equipment to ensure it is under the 15mA limit. Using specialised metering equipment Micron Group conduct earth loop impedance testing and earth leakage current testing to determine if the individual circuit or devices have any leakage to earth.
RCD Regulations Regarding Upgrade of Circuits and New Installations
New builds, including fitouts are required to have protection installed on all final subcircuits including lighting circuits (AS/NZS 3000: clause 188.8.131.52). Additionally, any modification to existing circuits (such as relocating or adding a power point or light) is considered ‘new’ and must therefore ensure protection is in place (AS/NZS 3000: Clause 184.108.40.206). Review the Safework NSW managing electrical risk requirements here Safework Managing Electrical Risks Requirements