I'm no expert, but here in Norway we predominantly have IT systems[1], though ne...

		magicalhippo on June 13, 2022 \| parent \| context \| favorite \| on: Toyota unveils 8.7 kWh battery for residential app... I'm no expert, but here in Norway we predominantly have IT systems[1], though new installations are mainly TN. In the IT systems, the protective earth is not bonded to the neutral. Thus in case of a fault, the protective earth should be low impedance to ground so that the circuit breakers trip. At least that's my understanding. [1]: https://aktif.net/en/types-of-earthing-systems/#IT_System

Thanks for the link. I don't know all the symbology there so it will take some reading up.