Earth wire under sink

I think the poster is saying that bonding a sink can introduce more risk than not bonding.

In this particular case, it would have been less likely to receive as severe a shock with the second hand in contact with isolated metal than earthed metal.

But the sink bonding is to mitigate against potential differences in installation fault conditions, or faults outside it (failed neutral at minipillar etc). Bonding the sink can increase the risk compared to an electrically isolated one. That risk was seen in this case also.

We have nothing to confirm that this sink without bonding connection has a high enough resistance to prevent a fatal current. It may or may not.

If sink, incidentally has a high enough resistance, then there is nothing to say that the floor to human contact will not be the route for the fault current in the next instance.

Fundamentals are, a faulty machine and if it is a +30mA fault not tripping RCD, it starts to point towards something not conforming with wiring or associated protection.

Further, the bonding that existed before the wire removal, should have been the least resistance fault route to allow equipotential state of live machine body to sink, so, something (seems) not equipotential there if a shock level current travelled through poster.

If hand to hand is approx 2.3kohm, and the equipotential bond of sink to machine 1ohm, then for a 30mA (assuming RCD would have activated otherwise) fault current using the bonding route, the human coming in parallel would have endured 0.00001A current.....I think🤔

I just feel that removing equipotential bond to sink is a bad patch.

But you see, by the posts, it is not agreed that sink earth removal was a bad mitigation in this scenario.

Further, the equipotential scenario not blurred with me.

Fundamentally, in a correctly wired scenario, the sink and machine would have been equal potential, so should not have offered a shock-level fault current path through the human.

Would that be a fair assumption?

Guy who got a shock from washing machine there may be a fault in the socket supplying the washing machine that was not fixed by replacing or fixing the washing machine. That fault may be still there today increasing the risk of getting a sock from new washing machine. Worst case the new machine has no earth and case could go live due to fault or old lose socket and a family member could get a serious shock some time in the future. Some shocks can kill. Trips are not guaranteed to trip as you already found out.