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2 answers

To create a return path (to earth) for the live conductor via the load/appliance.

2006-09-03 23:25:54 · answer #1 · answered by jayktee96 7 · 0 0

en.wikipedia.org/wiki/Residual-current_device

2006-09-07 08:03:33 · answer #2 · answered by flymetothemoon279 5 · 0 0

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