Sorry, I described the set up badly.
The supply into to the house is 3 phase & neutral. It comes from the meter to a 3 phase circuit breaker, inside the garage but still owned by the supply company. From there the phases are distributed in the main circuit breaker panel via mccb and 2 pole mcb’s for single phase distribution throughout the house. It also goes to a 3 phase panel which feeds the hydraulic motor for a lift.
Im trying to communicate with the sparky from a distance (I’m away from home) so that it can be incorporated with other work on the house, scheduled for completion before I return. It would greatly ease the communication if I could share a drawing with him but I haven’t managed to find one online and I’m not sure enough myself to sketch it out.
I will ask that the distribution is rebalanced and that the sockets in the listening area are put on the “quietest” phase. I guess that means one without the fridge but with LEDs all over the place I’m not sure what’s worse. Obviously the dedicated radial will have to come off that phase.
I will also ask if a dedicated earth can be safely/legally installed rather than connecting to the neutral. I don’t see an earth as such, just the neutral but the sparky will have to advise on that.
At the end of the day, it might not be possible if there’s not enough room in the existing conduit so the best I could do is connect to a quiet phase. I do want to try though and want to be as clear as possible with the sparky- we are not communicating in my native language and there are limits to my technical vocabulary. A picture paints a thousand words s they say…