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.
On Friday, March 21, 2025 at 5:58:40 PM UTC+7 Adrian Godwin wrote: > GFCI is mandatory on new installations in the UK, typically 20mA. However > there are a lot of older installations without them. > However note that the 230V is not served centre-tapped about earth like US > range power : We have a 230V 'live' terminal and neutral is earthed at the > substation so may be a few volts above earth at the house due to voltage > drops in distribution. So it's nominally 230V above earth too, there is no > possibility of getting 110V without a transformer. > > > On Fri, Mar 21, 2025 at 9:55 AM Rik Declercq <[email protected]> wrote: > >> GFCI is mandatory in Belgium on +all+ outlets, they're placed in the >> switchboard, right after the main manual switch, before all other fuses. >> There's even 2, actually, one that triggers @ 0.03A (for surviving bathroom >> and washing machines.... 'wet' accidents) and one @ 0.3 A for everything >> else. Those are placed in series, so often trigger both if you do something >> very stupid. >> >> >> >> On Fri, Mar 21, 2025 at 8:20 AM gregebert <[email protected]> wrote: >> >>> For those who live with 220V mains, I'm curious if anyone has used >>> 110VAC-to-GND for their projects. I'm sure it violates electrical codes, >>> and there are plenty of reasons why doing that is unsafe, but I wouldn't be >>> surprised if it's been tried by folks here. >>> >>> GFCI (ground fault circuit interruptors) are commonly used here in the >>> US for some outlets inside homes, usually in areas like kitchens or >>> bathrooms where water is running, and also outdoors. So, exploiting the GND >>> prong would cause a GFCI to trip; it's also redundant because all outlets >>> have a neutral conductor anyways, so using the GND accomplishes nothing. In >>> other words, we can't get 60VAC using GND (yeah, if we *did*, then I >>> probably would have used it). >>> >>> >>> -- >>> 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/cc46c9e3-2a36-4d2b-8a9f-be150cde0268n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/cc46c9e3-2a36-4d2b-8a9f-be150cde0268n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> 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/CAFNBpdFRa6aoPw3YfMY%2BAizecLxMqO22BN6PfVXeroLnvFuOFg%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/neonixie-l/CAFNBpdFRa6aoPw3YfMY%2BAizecLxMqO22BN6PfVXeroLnvFuOFg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- 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/fd1d4ff1-2806-46fb-b4ce-178120a0633cn%40googlegroups.com.
