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Hello sparks
I was at a Job earlier today,the customers upstairs lights would not turn on due to the 6A mcb operating so it's a short circuit so I disconnected the supply to the first light the supply disconnected from consumer unit ,then did a insulation resistance which came out clear tried the mcb without any connection it stayed on.so connected the supply at consumer unit and left the other end not connected to anything it stayed on so connected the loop out and switch live it all come back on for 2 poxy minutes then it would come back on .I had to leave disconnected and will be returning back tommorow . Any suggestions would be extremely grateful
Thanks
 
It would be interesting to know what has been fitted.

The trouble nowadays is RCBO’s being peddled as the instant cure all for all ills. A lot more effort should be made so that people understand the shortcoming of SP RCBO’s.
 
It would be interesting to know what has been fitted.

The trouble nowadays is RCBO’s being peddled as the instant cure all for all ills. A lot more effort should be made so that people understand the shortcoming of SP RCBO’s.
Explain then, I fitted proteus sp rcbo 30mA, I always thought that rcbos are the best protection to have in domestic due to it being less disruptive to other circuits if a fault occured. I'm sure your gonna have a lot to say about this
 
Last edited:
Single pole rcbo will operate in the event of an N-E fault but will not clear it, I'm sure you can how this can be a problem. Split board with 2x 30ma RCDs will cover all circuits and disconnect both L+N on the affected circuit in the event of a fault.
 
That was last week Son and the gadgee came knocking at the door to read it but I wasn't in! ;)


Oh didn't I tell you? I let a nice little man in with Jack boots and a swastika on his back........ he asked if I could show him the meters, but I wasn't sure what he meant, so I just showed him those things which whizz round, and have "GAS" and "ELECTRICITY" on them. He thinks you may need new ones as they are going backwards and he will try and catch you next time. :dita:
 

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