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Can you replace just the RCD, instead of whole consumer unit?

Former Community Member
Former Community Member
My apartment failed it's EICR due to the electrician not being able to trip the RCD in the required time.  I am told that the RCD cannot be replaced and a new metal consumer unit must be installed at a quote of £1180.  The apartment was built in 2003 and seems overly wasteful to ditch the whole unit, however I am not an electrician so would welcome some guidance please before I commit to this remedial action.


This is the RCD currently fitted:
5760S | MK 63 A RCD Switch, Trip Sensitivity 30mA | RS Components (rs-online.com)


It appears it worked within spec for above 30mA, but failed for below, if that helps with whether the whole consumer unit must be replaced.  See report.
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    Bear in mind that busbar arrangements are not standardised, and vary between manufacturers - and more importantly, the same manufacturer may change over time. In particular, the depth of the busbar varies (i.e. looking into the CU, how near or far away it is) and the shape of the busbar prongs - may be fingers or twin fingers, or solid - just slight notches cut in the busbar. So a current device may not mechanically fit in an older CU.


    Is this RCD acting as the main switch?
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  • 0
    Bear in mind that busbar arrangements are not standardised, and vary between manufacturers - and more importantly, the same manufacturer may change over time. In particular, the depth of the busbar varies (i.e. looking into the CU, how near or far away it is) and the shape of the busbar prongs - may be fingers or twin fingers, or solid - just slight notches cut in the busbar. So a current device may not mechanically fit in an older CU.


    Is this RCD acting as the main switch?
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