I am currently working on the wiring in a friend's house. When it was originally installed, the homeowners insisted that every wire be placed in its own conduit. This means that every power socket has two conduits running to it, and every light switch has three:
As you might imagine, this means that to run a new conduit to somewhere, you would need to spend twice the effort. This is really annoying, but this is a rule imposed by some older folks who don't believe in the fire-safety of double-insulated wires; they had a house fire multiple times, so one can forgive them a certain degree of paranoia.
I was wondering — is this actually legal? Are you allowed to split a single double-insulated wire into two single-insulated wires and run them like this? If not, is there a clear reason why? If it is, are there any good reasons for why you might do this?
This is in Russia, so I would ideally want answers regarding the Russian electrical code, but I don't suppose there are many people familiar with that here so European standard-based answers are also acceptable.
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