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From: "Edward Rawde" <invalid@invalid.invalid>
Newsgroups: sci.electronics.design
Subject: Re: British (european?) kitchen counter electric outlets
Date: Sun, 16 Jun 2024 14:37:26 -0400
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"Martin Brown" <'''newspam'''@nonad.co.uk> wrote in message news:v4m1bn$3ub3e$1@dont-email.me...
> On 16/06/2024 03:23, Edward Rawde wrote:
>> "bud--" <null@void.com> wrote in message news:lBrbO.17569$iz_6.16993@fx14.iad...
>>> On 6/11/2024 9:26 PM, Grant Taylor wrote:
>>>> On 6/10/24 23:45, bud-- wrote:
>>>>> As I expect you figured out, Christmas lights have tiny wire and need protection.
>>>>
>>>> Christmas lights are just the only example that came to mind in the U.S.A.
>>>>
>>>> I would personally prefer to have a 13A fuse on an extension cord plugged into a 15A outlet so that the fuse would blow close 
>>>> to
>>>> where I'm using the cord instead of having to traipse through a building to the breaker panel.
>>>>
>>>>> Probably somewhere in this thread, the UK you have 30-32A ring circuits and current about half here with correspondingly small
>>>>> cord wire so you need fuses in plugs. One fuse?
>>>>
>>>> I would think that you'd want to open the (both) hot(s). Much like how you want a double poll breaker to open both hots on a 
>>>> 240
>>>> V domestic load in the U.S.A.
>>>>
>>>> Blowing / opening one hot would still leave live power via the other hot in a dual hot cord.
>>>>
>>>
>>> I think UK is 230V hot-neutral?
>>
>> When I was growing up it was 240V live-neutral.
>> And changing to 230V would have been unthinkable due to the number of "why has my TV picture width shrunk" complaints which would
>> have occurred.
>> I may have heard the word "hot" in other contexts but not for AC power.
>> Also, some wiring installations still existed with live (hot) in red, neutral in black and earth (ground) in green.
>
> They still exist in older buildings. New wiring with that old code is not allowed.
>>
>> It may be the case that 240V has now been reduced to 230V in line with the rest of Europe.
>> And these days most, perhaps all, electronics won't care about the difference.
>
> No we have a nominal 230vac which in practice varies between 220vac and 255vac depending on where you are and local loading.

Ok. Most of the all country power adapters I have are labeled 100-240V 50-60 Hz so I hope they were designed for up to 255V.

> Our mains was sometimes high enough to blow filament light bulbs. In cities such wide variations are much less common but single 
> line rural feeds are higher near the transformer so that the folk at the far end get the volts.
>
>> In the UK I remember being asked to wire a plug for a 230V piece of equipment which had arrived from the US.
>> Fortunately by then I knew that black wasn't neutral in the US.
>
> -- 
> Martin Brown
>