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BS EN 60204-1:2018+A1:2025 – Electrical Control Panel Compliance Checklist Page | 5 19322/20 Advisory Note – Touch Current and Earth Leakage These advisory outlines the distinction between Touch Current and Earth Leakage Current with respect to their relevance under BS EN 60204-1:2018+A1:2025 and associated UK compliance frameworks for electrical equipment and control panels. Compliance Summary BS EN 60204-1:2018+A1:2025 does not mandate routine measurement of touch current or earth leakage current for Class I electrical panels. Compliance is typically demonstrated through earth continuity, insulation resistance, verification of protection against residual voltage, and where applicable, fault loop impedance (Zs) at socket outlets. Advisory Position For most industrial installations, formal testing of touch current is not expected unless explicitly required by a product standard. Earth leakage current may be measured where functional safety, RCD discrimination, or operational characteristics demand closer evaluation. Practical Considerations for Earth Leakage Measurement In many industrial settings, control panels are bonded to structural steelwork and multiple parallel earth paths exist. Under these conditions, measurement of earth leakage current may not reflect the total leakage due to current division through structural components, armoured cable sheaths, or extraneous bonding conductors. Standard clamp measurements on a single protective conductor may therefore provide only a partial result. These factors should be taken into account when interpreting earth leakage readings, particularly in installations with extensive steel bonding. Where leakage measurement is recorded, it should be acknowledged that structural and parallel return paths may influence the reading.
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