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RCD tripping over 40ms on 5x
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<blockquote data-quote="Sidewinder" data-source="post: 487316" data-attributes="member: 9512"><p>The issue is that the testing required by BS 7671 is not to test the function of the RCD in circuit, it is intended to test the function of the RCD in isolation.</p><p></p><p>If the manufacturers have their way the only test we will be doing is the test button.</p><p></p><p>The testing in BS 7671 is copied from the product standard.</p><p></p><p>There are several issues with testing them in circuit which could result in false readings. These are all down to circuit characteristics that can be identified by circuit investigations.</p><p></p><p>Do I test them in circuit, yes, but, if I see an issue or get a borderline reading, I will disconnect, test the RCD in isolation, then again in circuit.</p><p></p><p>This will give me the indication of the reasons for the original issue.</p></blockquote><p></p>
[QUOTE="Sidewinder, post: 487316, member: 9512"] The issue is that the testing required by BS 7671 is not to test the function of the RCD in circuit, it is intended to test the function of the RCD in isolation. If the manufacturers have their way the only test we will be doing is the test button. The testing in BS 7671 is copied from the product standard. There are several issues with testing them in circuit which could result in false readings. These are all down to circuit characteristics that can be identified by circuit investigations. Do I test them in circuit, yes, but, if I see an issue or get a borderline reading, I will disconnect, test the RCD in isolation, then again in circuit. This will give me the indication of the reasons for the original issue. [/QUOTE]
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RCD tripping over 40ms on 5x
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