Volex CU and RCBO

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Todays little just job? "Just assist me with changing an RCBO".
Being a rental he goes 2 handed.

Split load Volex VCU 16 slot CU consisted of; Main switch, SPD & MCB, 32A MCB for garage -not on RCD 2x 63A RCD, 2x ring final, cooker, shower, immersion & 2x lights. So completely full.
EICR listed as C1 garage power; 3x DSSO on damaged 2.5mm² T&E so required repair & smaller OCPD+RCD and Landlord insisted he didn't want it on existing RCD's so RCBO seemed obvious way to go.

The board is VCU range with VB range of breakers, We turned up with VRCBO20 type A.

Has anyone else fitted a RCBO in a Volex VCU?

Basically the RCBO fills the space right to the neutral bar, we had to remove busbar, unscrew the DIN rail and prewire RCBO before clipping in place but that was after moving the tails and other wiring out of the way, of which most had to enter in that corner of course, then replacing DIN and busbar.

Apart from not having the space I reckon it would have been quicker & easier to replace the CU. It would have definitely been quicker and easier to add an external RCD.
 
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