Use of a three-core cable in wiring without grounding
There was a need for an apartment to measure the old aluminum wiring, put a counter and a shield. The house now has no protective grounding, all wiring is 2-wire. After 6 years, the house will be overhauled by electricians, we will make protective grounding on the house.
Is it possible to make protective grounding in the apartment in new outlets and the shield now, connect everything, and connect it to the ground after 6 years. Or to separate a 3-wire cable and not to connect the third wire in sockets?
That's just what you NEED to do. Due to the fact that according to PUE 7, the TN-C or TN-CS grounding system must be used in all buildings under construction or under reconstruction, but you cannot technically do it now, therefore, electrical work must be carried out with the possibility of a subsequent transition to the TN-S system or TN-CS.
The main thing in the shield is insulate the ends of the "third" wires, which after 6 years, connect to ground. This is necessary so that for some reason tension does not appear on them. In this case, you can connect to outlets and equipment at least now, in principle!
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