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Published: 5 November 2004
Category: Q&A
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Answer:
Residual current devices (RCD) rely on detecting currents flowing in the earthing conductor by measuring the out of balance currents between phase and neutral conductors. In a TN-C installation, the neutral and earthing conductor are combined thus making the detection of residual current impossible.
Residual current devices (RCD) rely on detecting currents flowing in the earthing conductor by measuring the out of balance currents between phase and neutral conductors. In a TN-C installation, the neutral and earthing conductor are combined thus making the detection of residual current impossible.