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Discuss Two new Wylex RCDs both failed tests in the Electrical Testing & PAT Testing Forum area at ElectriciansForums.net

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Folks,

A bit baffled (not difficult) ... added a light switch in a rental this week (empty property so no social distancing issues) and checked the RCD before I signed off. It was a Wylex 80a 30mA and it failed all tests (inc. ramp) so I like-for-like replaced it. The new one also failed all tests (1/2, 1, 5 and ramp). Figuring I'd got a faulty one I replaced it again with the same results.

So ... surely not 2 new dodgy Wylex RCDs? Must be a problem within the installation? Tried testing the RCD on its own with no loads, same result. RCD stays on and the manual test trip works.

Megger MFT1552, 30mA range, Ze 0.29ohms, PFC 0.78kA.

Do I need to go to dead tests?
 
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Lucien Nunes

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