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    Why could my mains RCD be tripping on higher rated MCBs

    Hello Looking for advise please.  Our mains RCD switch 60A 30mA MK LN 5760 is tripping when either one of my larger mcbs is turned on.  - 32A shower - 30A sockets  - 30A cooker I turned every breaker off and individually turned them on. All three mentioned above individually trip the mains...
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