Discuss MCBs tripping randomly? in the UK Electrical Forum area at ElectriciansForums.net
Hello mate sorry for being MIA again, I’ve just had my second kid so been very busy with her!Lewis Curle: have you been able to investigate this problem further to your last message?
This is the key phrase. If the power went off, and came back on again with nothing being done, then short of there being a local momentary power cut affecting the whole area, it can ONLY be a 'loose connection' of some kind, from, and including, the main switch, back to the branch off of the local supply network.Another time my partner turned on the oven in the kitchen and for a split second everything in the house lost power and came back good again.
Thank you to both of you for replying! I am going to get the electrical supply people down this week to check the connections that I can’t check. In the meter box that is. I am very confident that there is no loose connection inside my DB.This is the key phrase. If the power went off, and came back on again with nothing being done, then short of there being a local momentary power cut affecting the whole area, it can ONLY be a 'loose connection' of some kind, from, and including, the main switch, back to the branch off of the local supply network.
I live in the outskirts of a city, so not really but yes at the same time I’m pretty sure it’s a TNCS, the earths and neutrals are connected somehow in the DB.This is a conundrum, I have only quickly browsed through the comments. Do you live in a rural area? And do you have a PME supply?
Yeah so long story short. The sun house MCB trips out when I’m on my pc which is now in the sun house. It only trips when things in the house are being used, I can game for hours when my partner isn’t cooking or watching tv (basically using anything in the house). She’s definitely not doing it purpose I want to make that clear as it’s been mentionedJust want to confirm some details. The issue occurs with the mcb tripping that feeds a sunhouse with your pc being the main significant load. You also have others circuits trip spontaneously in the dwelling but they are seemingly intermittent and do not occur instantly when any load is present. You have a split rcd consumer unit and the fault can occur on both sides of the DB but do not trip the RCDs
So other MCBs have tripped but it’s mainly the sun house one. The RCDs have never tripped. MCBs on either RCDs have tripped yes and I’ve tried swapping the sun house one so it’s been on both RCDs. The sun house MCB has tripped when nothing in the sun house has been on. But mainly happens under loadJust want to confirm some details. The issue occurs with the mcb tripping that feeds a sunhouse with your pc being the main significant load. You also have others circuits trip spontaneously in the dwelling but they are seemingly intermittent and do not occur instantly when any load is present. You have a split rcd consumer unit and the fault can occur on both sides of the DB but do not trip the RCDs
So I’ve had chance to get busy on investigating this more.Forgive me for not saying so earlier - congratulations on your new baby daughter! What good news.
How certain are you that this happened?Another time my partner turned on the oven in the kitchen and for a split second everything in the house lost power and came back good again. Nothing tripped in the distribution board but my pc turned off and back on again very quickly.
It 100% happened! I was in the kitchen when it happenedHow certain are you that this happened?
Trunk main?In that case, there was either a coincidental short power cut, affecting your local area, or there is a poor connection in your electricity supply between where it connects to the trunk main and the meter in your house.
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