Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
electric fuseboard RCBO?
Test button won't work but got electricity . could changing a socket recently be the cause . mcb is working so got electricity , nothing obviously wrong . thanks !
!) i'm going to check the socket in the morning
2) yes it's the test button that is not working
3) can't remember if i tried the test before i changed the socket
sorry doreen . the trip ( mcb) is working but there is a rcbo on the fuseboard to cover sockets and a test button , it's the test button that is not working .
start again , on fuseboard there is a " test " button , that is not working other switches operate . not going to stick my hands in there doreen , not that type of person but interested what is or maybe happening , will get an electrician
7 Answers
- KevLECLv 68 years agoFavorite Answer
They have a tendency to get stuck which is why its recommended to test quarterly.
Tr turning on/off manually a couple of times before you try test button.
Source(s): Lecky - Girlie ElectricsLv 78 years ago
The "test" button on RCBOs and RCCBs merely checks that the spring inside is working correctly.
You should test it every 3-6 months, to stop the spring sticking..
Try pressing the test button with a slim pointy stick, as fat fingers don't always work.
IF It still sticks, and the man/woman is there to fix it..
Sometimes removing the RCBO and giving it a damn good shake frees it off.
New RCBOs can be eye-wateringly expensive depending on brand.
- Anonymous8 years ago
The test buttons on rcd's and rccbos only tests the device by breaking the field ballance internally,it will not varify that the device coils will operate under fault conditions however if the earth loop impedence (total resistance of earth loop) exceeds the rated value for your rcd/rcbo characteristics it will not operate at all, my advice is to contact you local qualified and registered electrician to investigate as if the device is faulty they will be able to replace it and test and varify safety of your entire installation to ensure suitable earth loop impedance values throughout. I reccommend an eca,niceic or napit registered electrician. We undergo scruitinous assessments to ensure our work is done correctly,any electrician outside this loop nowadays is considered sub-standard,dont put yourself and neighbours at risk, hope this helps. Craig
Source(s): Chief executive,c.hermitage electrical services,since 2003 - How do you think about the answers? You can sign in to vote the answer.
- Steven JLv 78 years ago
Test buttons are only on arc protection and ground fault breakers. Normally I only see them on the outlets.
Fuses do not have this option.
Manufacturers recommend that you exercise the test/reset on a regular basis. If you do not the breaker can be locked either on or off. Normally they fail locked off in the safe position. But I have seen them locked on, and had to replaced.
Source(s): Union Electrician. Experience working in some of the harshest enviroments to Nuclear Power plants. - 8 years ago
I'll be over there in the corner listening to my wireless.
