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Do-It-Yourself (DIY) Question & Answer Forum
RCD Tripping for no apparent reason
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<blockquote data-quote="ELECTRICMEN" data-source="post: 554157" data-attributes="member: 32704"><p>As you state the RCD is 100mA, It may be prudent and compliant to remove and change with one with a 100A\30mA rating, Then if the New RCD\RCCB Keeps tripping then try to leave off one circuit at a time, but remember you could have a combined earth leakage on say 2 or 3 or 4 combined circuits greater than 100mA</p><p></p><p>But on a more technical note, imagine an RCD\RCCB Like a bucket that holds water, 30mA before it is full and tips over, you could have items on the circuits that are leaking say 5mA, 15mA, or 20mA, These leakages all safe leakages, but combined these items total more than the max rating of 30mA and hence you might just need a tech to establish your total earth leakage per circuit.</p><p></p><p>Hope that helps a bit.</p><p></p><p>All the best.</p><p>Mr Spence Eng (retired)</p></blockquote><p></p>
[QUOTE="ELECTRICMEN, post: 554157, member: 32704"] As you state the RCD is 100mA, It may be prudent and compliant to remove and change with one with a 100A\30mA rating, Then if the New RCD\RCCB Keeps tripping then try to leave off one circuit at a time, but remember you could have a combined earth leakage on say 2 or 3 or 4 combined circuits greater than 100mA But on a more technical note, imagine an RCD\RCCB Like a bucket that holds water, 30mA before it is full and tips over, you could have items on the circuits that are leaking say 5mA, 15mA, or 20mA, These leakages all safe leakages, but combined these items total more than the max rating of 30mA and hence you might just need a tech to establish your total earth leakage per circuit. Hope that helps a bit. All the best. Mr Spence Eng (retired) [/QUOTE]
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RCD Tripping for no apparent reason
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