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Created on November 6, 2024
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At the origin of an electrical installation to ensure the fault path is adequate for safe operation. This test confirms that fault currents can return to the source quickly, allowing protective devices to disconnect and minimize electric shock risk.
Unit 304
prevents direct contact with live electrical parts by using insulation, barriers, or enclosures to reduce the risk of electric shock.
Provides extra safety by using devices like Residual Current Devices (RCDs) to quickly disconnect the circuit if someone comes into accidental contact with live parts
measured from the point of fault back to the power source, ensuring the circuit’s protective devices can disconnect power within safe time limits if a fault occurs.
Zs
Additional protection
Ze
Basic protection
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