Dishwasher Tripping RCD. USB’s to Blame?

Cerco

Integrated dishwasher about 9 years old started tripping RCD. Wash cycle takes 1hr. 10 mins normally. The trip happens around 50 mins into the wash. Resetting the RCD , the cycle continues and finishes as normal. This fault showed up consistently three times. Given the age if the machine, I was resigned to replacing it. However, I was looking to rule out anything other issues before forking out.

There was a twin power socket with two integrated USB charging ports, on the same circuit. We had not used the usb’s much but the power sockets were in daily use. I checked the USB’s and both were faulty. I replaced it with a standard twin socket.

Just for the hell of it, I tried the dishwasher and now it works fine. Seems very strange to me. Anybody come across any earth leakage problems with these type of USB’s on power sockets?

I bought them in either Aldi or Lidl about four or five years ago. They have the CE marking on them.

.

kirk.

Dunno but I wouldn't bother with usb sockets just keep them separate to the 13 amp sockets

When you say they were faulty do you mean they weren't working ?

davebuck

Time will tell if you don't have any more trips you've sorted the problem, had you many trips without the dishwasher on?

Cerco

https://www.boards.ie/discussion/comment/120425228#Comment_120425228

Still running fine. No trips while dishwasher off.

When the problem was there it tripped every time we used it. Strange thing was when I reset RCD programme continued on finishing without any problem.

Antenna

When you removed the old socket, was there any build up of dust/grime around the terminals at the back of the socket ?

If so that may have been causing some leakage from L to E, but not, in itself, enough to trip RCD. However the dishwasher may itself have a very small leakage from L to E (but within limits). Either issue on its own not a problem, but when both combined, could cause RCD trip?

Cerco

https://www.boards.ie/discussion/comment/120447587#Comment_120447587

No, nothing I could see anyway.

Dishwasher still,running fine.

Cerco

Update: well the RCD tripped again last week.It seems the issue was the dishwasher all along. Strange thing isn’t it worked fine until now. It seems steam/water is leaking in under the door seal. It tripped after running it twice, a wash and then a cleaning run very shortly afterwards.

Water leaking out from the seal., the controls are mounted in the door.

Going to replace it as it is about 13 years old.

cerco