LSpark
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[quote author=Matt link=1087741145/0#0 date=1087741145]Hi there, I have a Crabtree Starbreaker Consumer unit in a house I have recently moved into. The house is about 9 years old. Every so often (twice in the last 3 weeks) the RCD trips. There is nothing special happening. This latest time I was just watching TV, before I was in the garden. After the RCD trips it will not reset unless I turn off all the MCBs and then turn on the RCD and then all the MBDs. Everything then comes back on and all seems well again. If/when it happens again I will try going through turning one MCB off at a time trying the RCD to see if that helps point towards the problem. Has anyone got any other ideas that might help me please?
It is a split load RCD protecting the sockets around the house, the kitchen sockets, the immersion heater (which is not on) and the cooker (which wasnt on at either time). It says on the RCD "RCCB 63A 30mA" I dont understand the difference in the two current readings on it but understand that the 30mA is the trip current, should I get a higher rated RCD? (Although only a 3 bed semi, I do put a reasonable drain on the electricity). We have just installed a new Fridge and a new Freezer however the first time it happened was with our old Fridge/freezer and the second time was with the new appliances.
Many thanks in advance for any help. [/quote]
what you have there is a split load consumer unit, one side is protected by an RCD\RCCB unit, and one side is unprotected.
Your Residual Current Circuit Breaker (RCCB) is rated at 63A this is the maximum loading you should put on the RCCB, the 30mA is the rating it will trip on earth leakage, this is the normal range of RCCB to give protection to yourself and others, this cannot be any higher as this will not give adequate protection to yourself.
I would suggest firstly you switch all MCB's off and switch the RCCB on, switch each MCB on and then off, this will find any circuit with blatent fault on it, failing this also try with MCCB on and switch the MCB's on one by one until all on, if still no problem you most likely have a problem with some plug in equipment you or someone else is using
This is most i can suggest to you right now
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