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RCD testing question

Just reading GN 3 page 95, operation of RCDs.

I've always thought, (and taught) that you press the test button at the end of the sequence of RCD tests simply because if you you use the test button first you can "unstick" a potentially faulty device and allow it to pass the tests when it might not have?

At a recent CEF / NICEIC Techtalk event they said exactly the same thing, "Join CEF's (or NICEIC) Head of Technical Solutions Darren Staniforth and electrical legend Dave Austin for a TechTalk near you."

Any thoughts on what page 95 GN3 says now? That you press the test button before using the tester?

Kind regards

Marc

0 gkenyon over 2 years ago in reply to davidwalker2

davidwalker2 What would you recommend? Take a resident-owned property and electrical installation.

This may not be inspected and tested for many years? What ought BS 7671 to say?

I understand it's not an easy question ... and equally there are examples in commercial/industrial installations (regardless of the recommended periodic verification intervals) where pushing the test button regularly is not always considered feasible.
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0 mapj1 over 2 years ago

For those whose thousand pound a minute production lines must never stop, there are self testing self resetting RCDs available.

Though I must say I have yet to see one anywhere other than a catalogue, and I cannot help thinking that dual supplies and other measures would be better if it really cannot stop - then the RCD test is just another event that tests the fall-back systems.

Mike.
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RCD testing question

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