I meant to point out earlier, that as stated below 230V L to N does
'NOT' equate to 415V L to L. Whereas 240V L to N does indeed equate to
415V L to L. Thanks for the reminder.
Irv.
On 3/23/2025 11:00 AM, Yohan Park wrote:
UK is 240V while Europe mainland is 230V
On Saturday, March 22, 2025 at 4:31:01 PM UTC+1 Alex wrote:
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.
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