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Electrical Inspection & Testing Forum
"Nuisance" trip domestic oven / hob circuit
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 557155" data-attributes="member: 250"><p>I would agree it is most likely Oven related...</p><p></p><p>However I have seen some cheap-tat switches/sockets/fused spurs etc..</p><p>Over the years..</p><p>Assuming the switch(es) you have used are a decent brand, then I cannot see any issues..</p><p></p><p>But also have you have opened the switch to double check no melted / cracked / perished cable insulation that could be causing issues when the cables warm...</p><p></p><p>And have you have the oven/hob out to visually check cable terminations from connection plates to appliances?</p><p></p><p>I had an oven a few years back that had a loose termination on the back that gradually melted insulation back sufficient to trip the MCB while on..</p><p>But then MCB could be reset until it got warm again when more than one hot plate was turned on.</p><p></p><p>Are there any other 32A RCBO circuits on the board that you could swap over...</p><p>More as an exercise to show the customer that the RCBO is working correctly..</p><p>as I doubt there is anything wrong with it from what you say from your tests?</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 557155, member: 250"] I would agree it is most likely Oven related... However I have seen some cheap-tat switches/sockets/fused spurs etc.. Over the years.. Assuming the switch(es) you have used are a decent brand, then I cannot see any issues.. But also have you have opened the switch to double check no melted / cracked / perished cable insulation that could be causing issues when the cables warm... And have you have the oven/hob out to visually check cable terminations from connection plates to appliances? I had an oven a few years back that had a loose termination on the back that gradually melted insulation back sufficient to trip the MCB while on.. But then MCB could be reset until it got warm again when more than one hot plate was turned on. Are there any other 32A RCBO circuits on the board that you could swap over... More as an exercise to show the customer that the RCBO is working correctly.. as I doubt there is anything wrong with it from what you say from your tests? [/QUOTE]
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