this post was submitted on 20 May 2025
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Most of Norway (my house included) is still stuck on IT, so 230V phase/phase.
The only place it really sucks is for modern induction hobs where 25A @ 230V is a bit low (5,75 kW, max on mine is 7,2 kW) and the EV charge box (3,6 kW or 7,2 kW max instead of 11 or 22 kW).
They are however changing to TN for new areas.
Upside is that the earth current will be very small when you have a fault, so the system can function with it. I believe this is why critical institutions like hospitals run IT and not TN/TT.