I switched the MCB off to change the cooker socket to a new one after decorating. I checked power was off with fluke tester shown in pic. During the process the RCCB tripped. I cannot fathom why if the power was off. I was pondering it while working, and thinking about the odds of it happening coincidentally since it has never tripped before.
I completed the task and everything seemed to work ok. Afterwards I was changing the FCU next to it. Again I switched MCB and checked power was off, and changed the FCU. Again during the process the RCCB tripped.
So, is this normal? Acceptable? Anything I need to get checked or I can check? (have multimeter!). The circuits shown were part of a kitchen extension a few years ago.
thanks
*edit* don't worry just read it's the neutral touching the earth
cheers!
https://lh3.googleusercontent.com/-...AAAAAAG4Y/hmUP9DpYNVg/s1000-Ic42/DSC_5691.jpg
https://lh3.googleusercontent.com/-...AAAAAAG4c/py5eOZjx06M/s1200-Ic42/DSC_5693.jpg
I completed the task and everything seemed to work ok. Afterwards I was changing the FCU next to it. Again I switched MCB and checked power was off, and changed the FCU. Again during the process the RCCB tripped.
So, is this normal? Acceptable? Anything I need to get checked or I can check? (have multimeter!). The circuits shown were part of a kitchen extension a few years ago.
thanks
*edit* don't worry just read it's the neutral touching the earth
cheers!
https://lh3.googleusercontent.com/-...AAAAAAG4Y/hmUP9DpYNVg/s1000-Ic42/DSC_5691.jpg
https://lh3.googleusercontent.com/-...AAAAAAG4c/py5eOZjx06M/s1200-Ic42/DSC_5693.jpg