@ CYRUS2 How can you be sure that the installation will be connected to TN-S and not to TN-C?
If it will be TN-S or TN-C, what's the difference, since the 5th wire will not be needed, unless, hoping for a stroke of luck, we think about the activation of the RCD, but how can you know about it, since the author did not provide any details data, and in fact, I would not like to have a garage and a house under a common RCD, because if it is to protect it, it often causes unnecessary problems, especially with a long cable buried in the ground.
In my opinion, the lack of an entry by the author of the topic means that it should be closed until he answers the questions asked, which, by the way, does not mean that he should do it himself, because at best he will hurt himself and not others, then yes he will have a lot of problems.
By the way, clarifying the demands would also be useful.
tetrusmorderca wrote: a dozen or so fluorescent lamps and maybe some electric heater in winter.
It turns out that these several fluorescent lamps will be faster and cheaper to buy 6 halogen fittings, 500W each, and this heater is not a 2kW farelka, but a three-phase storage heater ...
So, Dear author, be more specific and answer ALL the questions that have been raised in the topic, and we will try to advise you on what to choose, which does not mean that you should connect it yourself, since as you suggested yourself:
tetrusmorderca wrote: Electricity is black magic to me.
greetings
Matthew
