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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Dishwasher RCD trip
Yesterday I woke up in the morning to find the ring mains all dead. A
process of elimination showed the fault to be the dishwasher, even when its programmer dial and front-panel switch were at the off position - which they'd been in since the machine was last used around a day earlier. There was no fault with the 13A socket itself (it worked fine with something else plugged into it). Google suggested the fault might be in the dishwasher's mains RF suppression capacitor, so I got the dishwasher out from under the worktop, and explored it until I found the relevant wiring. By then the machine was tipped up, for easy access, and because there's not much working space in the kitchen at that point I had the dishwasher plugged in (when needed) to a 13A extension cord running to a more convenient 13A socket. I couldn't then replicate the RCD trip. I also checked the wiring loom from machine's body to door, and the water heater though I didn't think either were likely to be the cause on a machine with switched off controller and power switch (unless they were faulty too). I tried a bucket of water tipped into the machine over the element as well. Still no RCD trip. Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. So, I feel like a fool for not checking the plug much earlier, but I also feel some sense of victory for avoiding a call-out fee to a local repair person whom I'm not convinced would have found the problem either. -- Jeremy C B Nicoll - my opinions are my own. Email sent to my from-address will be deleted. Instead, please reply to replacing "aaa" by "284". |
#2
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Dishwasher RCD trip
In article id, Jeremy
Nicoll - news posts scribeth thus Yesterday I woke up in the morning to find the ring mains all dead. A process of elimination showed the fault to be the dishwasher, even when its programmer dial and front-panel switch were at the off position - which they'd been in since the machine was last used around a day earlier. There was no fault with the 13A socket itself (it worked fine with something else plugged into it). Google suggested the fault might be in the dishwasher's mains RF suppression capacitor, so I got the dishwasher out from under the worktop, and explored it until I found the relevant wiring. By then the machine was tipped up, for easy access, and because there's not much working space in the kitchen at that point I had the dishwasher plugged in (when needed) to a 13A extension cord running to a more convenient 13A socket. I couldn't then replicate the RCD trip. I also checked the wiring loom from machine's body to door, and the water heater though I didn't think either were likely to be the cause on a machine with switched off controller and power switch (unless they were faulty too). I tried a bucket of water tipped into the machine over the element as well. Still no RCD trip. Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. So, I feel like a fool for not checking the plug much earlier, but I also feel some sense of victory for avoiding a call-out fee to a local repair person whom I'm not convinced would have found the problem either. Look on the bright side your OK .. the Caterpillar bought it;(... And as an additional bonus .. no repair call out fee... -- Tony Sayer |
#3
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Dishwasher RCD trip
Jeremy Nicoll - news posts wrote:
Yesterday I woke up in the morning to find the ring mains all dead. A process of elimination showed the fault to be the dishwasher, even when its programmer dial and front-panel switch were at the off position - which they'd been in since the machine was last used around a day earlier. There was no fault with the 13A socket itself (it worked fine with something else plugged into it). Google suggested the fault might be in the dishwasher's mains RF suppression capacitor, so I got the dishwasher out from under the worktop, and explored it until I found the relevant wiring. By then the machine was tipped up, for easy access, and because there's not much working space in the kitchen at that point I had the dishwasher plugged in (when needed) to a 13A extension cord running to a more convenient 13A socket. I couldn't then replicate the RCD trip. I also checked the wiring loom from machine's body to door, and the water heater though I didn't think either were likely to be the cause on a machine with switched off controller and power switch (unless they were faulty too). I tried a bucket of water tipped into the machine over the element as well. Still no RCD trip. Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. Its the Underground Resistance! Bloody sabouteurs! So, I feel like a fool for not checking the plug much earlier, but I also feel some sense of victory for avoiding a call-out fee to a local repair person whom I'm not convinced would have found the problem either. -- Ineptocracy (in-ep-toc-ra-cy) €“ a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers. |
#4
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Dishwasher RCD trip
On Sat, 13 Oct 2012 21:29:58 +0100, Jeremy Nicoll - news posts
wrote: Yesterday I woke up in the morning to find the ring mains all dead. A process of elimination showed the fault to be the dishwasher, even when its programmer dial and front-panel switch were at the off position - which they'd been in since the machine was last used around a day earlier. There was no fault with the 13A socket itself (it worked fine with something else plugged into it). Google suggested the fault might be in the dishwasher's mains RF suppression capacitor, so I got the dishwasher out from under the worktop, and explored it until I found the relevant wiring. By then the machine was tipped up, for easy access, and because there's not much working space in the kitchen at that point I had the dishwasher plugged in (when needed) to a 13A extension cord running to a more convenient 13A socket. I couldn't then replicate the RCD trip. I also checked the wiring loom from machine's body to door, and the water heater though I didn't think either were likely to be the cause on a machine with switched off controller and power switch (unless they were faulty too). I tried a bucket of water tipped into the machine over the element as well. Still no RCD trip. Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. So, I feel like a fool for not checking the plug much earlier, but I also feel some sense of victory for avoiding a call-out fee to a local repair person whom I'm not convinced would have found the problem either. I had something similar in the junction box that serves as a wiring centre for my central heating. In my case it was a chain of ants bridging live and earth. -- Graham. %Profound_observation% |
#5
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Dishwasher RCD trip
Graham. wrote:
I had something similar in the junction box that serves as a wiring centre for my central heating. In my case it was a chain of ants bridging live and earth. I had it with a slug that had climbed up the flexi from below the floor into the back of a 13A socket. Bill |
#6
Posted to uk.d-i-y
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Dishwasher RCD trip
Jeremy Nicoll - news posts wrote:
Yesterday I woke up in the morning to find the ring mains all dead. A process of elimination showed the fault to be the dishwasher, even when its programmer dial and front-panel switch were at the off position - which they'd been in since the machine was last used around a day earlier. There was no fault with the 13A socket itself (it worked fine with something else plugged into it). Google suggested the fault might be in the dishwasher's mains RF suppression capacitor, so I got the dishwasher out from under the worktop, and explored it until I found the relevant wiring. By then the machine was tipped up, for easy access, and because there's not much working space in the kitchen at that point I had the dishwasher plugged in (when needed) to a 13A extension cord running to a more convenient 13A socket. I couldn't then replicate the RCD trip. I also checked the wiring loom from machine's body to door, and the water heater though I didn't think either were likely to be the cause on a machine with switched off controller and power switch (unless they were faulty too). I tried a bucket of water tipped into the machine over the element as well. Still no RCD trip. Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. So, I feel like a fool for not checking the plug much earlier, but I also feel some sense of victory for avoiding a call-out fee to a local repair person whom I'm not convinced would have found the problem either. MM's black worms,must get around a bit. |
#8
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Dishwasher RCD trip
En el artículo id,
Jeremy Nicoll - news posts escribió: Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. Wonder what the resistance of a charred caterpillar is? :-) -- (\_/) (='.'=) (")_(") |
#9
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Dishwasher RCD trip
On Sun, 14 Oct 2012 11:52:19 +0100, Mike Tomlinson
wrote: En el artículo id, Jeremy Nicoll - news posts escribió: Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. Wonder what the resistance of a charred caterpillar is? :-) My ants bridged the terminals in an arc, and I fancy if the current wasn't limited to 30mA they would have glowed like an old carbon filament lamp. -- Graham. %Profound_observation% |
#10
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Dishwasher RCD trip
F Murtz wrote:
MM's black worms,must get around a bit. I thought of them, as soon as I found the victim. -- Jeremy C B Nicoll - my opinions are my own. Email sent to my from-address will be deleted. Instead, please reply to replacing "aaa" by "284". |
#11
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Dishwasher RCD trip
On 14/10/2012 14:26, Graham. wrote:
On Sun, 14 Oct 2012 11:52:19 +0100, Mike Tomlinson wrote: En el artículo id, Jeremy Nicoll - news posts escribió: Hmmm. Surely it couldn't be a problem in the plug? But it was. There was a cremated caterpillar, about 1/4" long between the earth pin and the nearest edge of the fuse holder. Wonder what the resistance of a charred caterpillar is? :-) My ants bridged the terminals in an arc, and I fancy if the current wasn't limited to 30mA they would have glowed like an old carbon filament lamp. The current isn't limited to 30mA ;-) (an RCD has no ability to limit current, only the duration of connection when the current imbalance exceeds its threshold) -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#12
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Dishwasher RCD trip
In article id,
Jeremy Nicoll - news posts writes: Yesterday I woke up in the morning to find the ring mains all dead. A process of elimination showed the fault to be the dishwasher, even when its programmer dial and front-panel switch were at the off position - which they'd been in since the machine was last used around a day earlier. Very often caused by the interference suppressor connected straight across the mains inlet. When you open up the back of a dishwasher for some other reason, it's not uncommon to find the suppressor has blown up at some time in the past (often without taking out any fuses or anyone noticing). Given the large number of machines in use which no longer have them working, I would just remove it (safely). -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
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