"Mike Humphrey" wrote
| "Owain" wrote
| | the cooker 32A MCB and the split load RCD had tripped.
| Have you connected the neutral to the wrong neutral bar i.e.
| if the cooker is on the RCD side you must connect its neutral
| to the RCD'd neutral bar.
| If that was the case, why would the MCB trip? The only way to trip
| both at once should be for much more than 32A to flow in the live,

Oh yes, I didn't notice the bit about the MCB tripping too :-)

| and *not* all return through the neutral.

Yes.

| I can't see how that can happen other than a live-earth short -
| damaged insulation, loose wires or a wrong connection are all
| possible causes.

Either way, it reinforces the need for proper inspection and testing before
energising circuits.

Owain