In Switzerland, there are many things that normally run on 3-phase power in a private household: oven, steamer, induction cooker, heat pump, washing machine, dryer, wall box, and of course, the ventilation system for the inevitable nuclear shelter :-)
Alex schrieb am Samstag, 22. März 2025 um 16:31:01 UTC+1: > Many properties (larger homes and any business premises and abive in the > UK) are supplied with three phase electricity, which is 230v phase to > neutral and 415v phase to phase. 120 Degree phase offset between the > phases. Very potent (and useful!) > > Our normal supply for residential is 230v phase to neutral, mostly as > already mentioned with N&PE joined at the cable entry to the property but > some (e.g. pole fed) only have L and N provided and earth is via an earth > rod (TT installation). RCD protection is mandatory in these circumstances > (and essentially mandatory anyway now as increasingly regulations require > more circuits to be protected). 30mA RCD protection for most circuits and > 100mA and / or time delay if upstream for discrimination. > > The rest of Europe is 220v, so a little lower than the UK, but we > harmonised by being +6% and -10% tolerance while the rest of the EU is +/- > 10%. > > The US way with 220v centre tapped is quite noval, but 3 phase is great > for workshops as it gives great torque in motors, though modern VFD > controllers bridge the gap mostly. > > > > On Friday, 21 March 2025 at 23:51:21 UTC David Pye wrote: > > Not just the UK - the whole EU is like that! > > David > > On Fri, 21 Mar 2025, 23:40 gregebert wrote: > > Wow! I had no idea the full 220V was present in the UK; that's a very > dangerous voltage to touch. In the US, neutral is connected to GND at the > point-of-entry to the building and there is also a grounding rod though the > electrical code only requires a maximum of 25 ohms to Earth (it varies due > to soil condition), and definitely wont suffice as a redundant neutral. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/5db0733a-c044-43ac-9dfc-45288defe988n%40googlegroups.com.
