Thunderbird Posted October 23, 2013 Report Share Posted October 23, 2013 I've got an issue with an electric double oven going pop and tripping the fuse in the consumer unit, even when none of the heating elements are switched on, just the red switch on the wall. Is it knackered? Quote Link to comment Share on other sites More sharing options...
goodo123 Posted October 23, 2013 Report Share Posted October 23, 2013 Could be the switch, or any part of the cbt feeding the switch Quote Link to comment Share on other sites More sharing options...
Griff36 Posted October 23, 2013 Report Share Posted October 23, 2013 My guess would be either the cable between the DP switch and oven is damaged or you had a loose connection on the terminal block (inside the oven) which has overheated/melted and caused a short circuit. Quote Link to comment Share on other sites More sharing options...
waterford103 Posted October 23, 2013 Report Share Posted October 23, 2013 If it's a circuit breaker that's kicking off then it may be as simple as a neutral to earth fault , possibly an element leaking to earth .Get it checked by an electrician with a megger to find the fault -- cheaper than a new oven ! Quote Link to comment Share on other sites More sharing options...
Thunderbird Posted October 23, 2013 Author Report Share Posted October 23, 2013 Thanks guys, that's a useful start. I'll get on it and see what's what. What's a megger?? Quote Link to comment Share on other sites More sharing options...
Sha Bu Le Posted October 23, 2013 Report Share Posted October 23, 2013 Thanks guys, that's a useful start. I'll get on it and see what's what. What's a megger?? Test kit for checking for short circuits, better than a DMM as they are able to detect very high resistance shorts. Quote Link to comment Share on other sites More sharing options...
Thunderbird Posted October 23, 2013 Author Report Share Posted October 23, 2013 Thank you once again gentlemen. Quote Link to comment Share on other sites More sharing options...
hchris Posted October 23, 2013 Report Share Posted October 23, 2013 Thermostat has probable failed which has left one of the elements on which has caused that fail. So as soon as power the oven up it knocks the trip out Quote Link to comment Share on other sites More sharing options...
goodo123 Posted October 23, 2013 Report Share Posted October 23, 2013 A "megger" doesn't really exist, megger is a trade name. It's actual name is insulation resistance tester. Quote Link to comment Share on other sites More sharing options...
Euget123 Posted October 23, 2013 Report Share Posted October 23, 2013 Hello It is more than likey a thermostat within the oven. It may be worth removing the switch and checking for any signs of burning/arching or loose conection. Only do this with the circuit turnrd of ofcourse. A new switch will be easier and cheaper replaced than any part of the oven Quote Link to comment Share on other sites More sharing options...
Twistedsanity Posted October 23, 2013 Report Share Posted October 23, 2013 They are nicknamed meggers as they are megaohmmeters ( mega for big, ohm for resistance and meter is self explanatory)if the thermostat has failed it would either make or break the power to the element which would either create the fault where the element was on all the time or wouldn't get hot, that wouldn't cause a trip, we also haven't distinguished if its the fuse that is popping or the elcb yet , a direct short between live and earth would pop the circuit breaker (fuse) , an earth to neutral would pop the elcb ( earth leakage circuit breaker) Quote Link to comment Share on other sites More sharing options...
Sha Bu Le Posted October 23, 2013 Report Share Posted October 23, 2013 A "megger" doesn't really exist, megger is a trade name. It's actual name is insulation resistance tester. This is true but ask anyone connected with electrical / electronic work and he / she will know exactly what it is. Quote Link to comment Share on other sites More sharing options...
Euget123 Posted October 23, 2013 Report Share Posted October 23, 2013 Sometimes stats can short to earth being fixed by replacing the stat!mate id advice getting someone out to look at it we cud al guess the problem for hours without seeing it or fiqure it out in 5 mins if it was infront of us! Quote Link to comment Share on other sites More sharing options...
goodo123 Posted October 23, 2013 Report Share Posted October 23, 2013 They are nicknamed meggers as they are megaohmmeters ( mega for big, ohm for resistance and meter is self explanatory)if the thermostat has failed it would either make or break the power to the element which would either create the fault where the element was on all the time or wouldn't get hot, that wouldn't cause a trip, we also haven't distinguished if its the fuse that is popping or the elcb yet , a direct short between live and earth would pop the circuit breaker (fuse) , an earth to neutral would pop the elcb ( earth leakage circuit breaker) megohmeter is an abbreviation although I agree they are sometimes referred to as this. Also in reference to the elcb I wouldn't expect one to be installed as nowadays rcbo or rccds are fitted and operate using a much better fault detection system. If their is a elcb fitted I would recommend changing it. With a elcb you can have unknown earth connections on the cct, particularly when pipework is bonded and it will affect it's operation. Quote Link to comment Share on other sites More sharing options...
djgeoff Posted October 23, 2013 Report Share Posted October 23, 2013 (edited) might be your timer faulty, that's powered all the time, plus if you use insulation res tester be careful they can put out 500volts to test insulation this will damage any electronic components eg timers, fan controls etc Edited October 23, 2013 by djgeoff Quote Link to comment Share on other sites More sharing options...
Thunderbird Posted October 23, 2013 Author Report Share Posted October 23, 2013 Some great replies thank you very much guys. Very interesting thread and I will investigate as per the advice. Quote Link to comment Share on other sites More sharing options...
bullet1747 Posted October 23, 2013 Report Share Posted October 23, 2013 If it's a circuit breaker that's kicking off then it may be as simple as a neutral to earth fault , possibly an element leaking to earth .Get it checked by an electrician with a megger to find the fault -- cheaper than a new oven ! If it's the breaker tripping it won't be neutral earth fault, if it's the RCD then it will Quote Link to comment Share on other sites More sharing options...
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