The only thing that will offer some protection is a medical grade isolation transformer. But the question asked here indicates to me that you do not have the knowledge or experience to be doing such work even remotely safely!!!
Agreed... Please get appropriate electrical safety training, or have someone else do this repair
The only way to be *safe* is to reduce the risk of touching live conductors to zero.
It's been said ad nauseum, but circuit breakers will not save you if you touch Mains voltages. An RCD or GFCI may save your life but 1. it will hurt like hell and 2. you may still die.
Even something simple like a plastic tub, cut up and placed over the dangerous parts of the circuit are a good way to reduce the risk to zero.
But judging from your understanding of electricity, you should not be poking around inside anything electrical.
Only a ground fault interrupter (Salvavita) can protect you. In Italy it is obligatory, but some older installations are missing it. Look in your distribution panel.
The team feel this particular thread has run its course and that the original question has been both answered and also expanded upon. The thread is now closed.
We would also urge the OP to read up on electrical safety before undertaking work on circuitry that has high voltage present. Electricity doesn't always give a second chance and so you need to be fully conversant with safe working practices.
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