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  1. M

    impedence across RCDs

    While investigating higher than expected Zs readings on a final ring, I find I get about one ohm difference across the RCDs in the CU when doing a live test. Ze is 0.1 but Zs on the downstream side of the RCD is 1.1. This is enough to push Zs on the ring out of spec. The actual resistance across...
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