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MCB and RCD mix and match of makes 536.4.203

Stewart Mason
Just wondering what peoples thoughts are to mixing makes of MCB's and RCD's in consumer units. I went to a callout the other night and the culprit was a faulty 61008 RCD. To get the power back on I replaced the faulty Item with a different make of 61008 RCD. The next day I raised a job to have the right make of RCD fitted. It turns out the QS at work isn't concerned about the incorrect make of RCD and is more concerned about IP ratings being met. Am I right in wanting to fit the correct make of RCD?


What would you code this as on a EICR?
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    One of the biggest problems with using different makes of device, in say a consumer unit, is that of old the screw terminals did not always exactly line up for the busbar. This could put strain on devices when the terminals were tightened. Of course late at night during an emergency situation it has been known for electricians to "graunch" in a different make of device in place to get the customer out of trouble. I have heard that M.C.B.s of a different make to the consumer unit have been placed at the end of the row of existing M.C.B.s and the bus bar cut short, and a suitable short cable link used to connect the new M.C.B. (So, I've heard like). Most R.C.D.s these days seem to be compatible and interchangeable in most cases.  I have myself successfully undertaken some on site modification engineering with no problems.


    Z.
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  • 0
    One of the biggest problems with using different makes of device, in say a consumer unit, is that of old the screw terminals did not always exactly line up for the busbar. This could put strain on devices when the terminals were tightened. Of course late at night during an emergency situation it has been known for electricians to "graunch" in a different make of device in place to get the customer out of trouble. I have heard that M.C.B.s of a different make to the consumer unit have been placed at the end of the row of existing M.C.B.s and the bus bar cut short, and a suitable short cable link used to connect the new M.C.B. (So, I've heard like). Most R.C.D.s these days seem to be compatible and interchangeable in most cases.  I have myself successfully undertaken some on site modification engineering with no problems.


    Z.
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