Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Why so hard to get Edison screw lamp holders?

2,320 views
Skip to first unread message

Clive Page

unread,
Apr 16, 2014, 9:10:39 AM4/16/14
to
I've noticed in recent years that all sorts of appliances, desk and
table lamps, outside light fittings, etc. all come with Edison Screw
(E27) lamp holders in them. So I've started to run down my stock of
bayonet cap bulbs and assumed that I'd gradually go over to having E27
bases everywhere, even if that meant replacing old lamp holders that
hang down from the ceiling roses with E27 holders (many of them need
replacing anyway as the bakelite cracks from the heat after some years).

Today I got a couple of CFLs at a good price when reduced to clear, but
they were only available cheap in E27 bases. So I immediately tried to
buy some E27 lamp holders, preferably with a cord grip. But as far as
I can see, they hardly exist. I could not find any in B&Q, or
Wilkinsons, or Tescos, or or the online listings of Homebase, or Wickes,
or Screwfix or Toolstation, or Maplin.

There must be something going on that I don't understand - is there
something wrong with using an Edison screw lamp holder for a lamp that
hangs from the ceiling rose? If not, that means keeping a stock of
spare lamps in both base types. Does everyone do that nowadays?

I haven't even found it easy to buy E27 lamp holders on line: the prices
seem to be at least three times that for bayonet cap holders. Since
much of the rest of the world seems to have standardised on E27 decades
ago, and at least half the bulbs in the shops now have E27 bases, I
don't understand why the corresponding lamp holders are so hard to find.

--
Clive Page

Chris J Dixon

unread,
Apr 16, 2014, 9:47:44 AM4/16/14
to
Clive Page wrote:

>I haven't even found it easy to buy E27 lamp holders on line: the prices
>seem to be at least three times that for bayonet cap holders. Since
>much of the rest of the world seems to have standardised on E27 decades
>ago, and at least half the bulbs in the shops now have E27 bases, I
>don't understand why the corresponding lamp holders are so hard to find.

Are you near IKEA?

http://www.ikea.com/gb/en/catalog/products/00067854/

HEMMA Cord set, white £3

On line:

<http://www.miniinthebox.com/e27-led-light-bulb-socket-base-holder-with-wire_p422151.html?currency=GBP&litb_from=paid_adwords_shopping&pla_adwid=9286587055_138820503_10904615703_65189101863&gclid=COehl5WS5b0CFZShtAodtFwATA>

<http://www.amazon.co.uk/VITA-Textile-cord-set-Electrical/dp/B00B04427W/ref=sr_1_2?s=lighting&ie=UTF8&qid=1397655891&sr=1-2&keywords=e27+cord+set>

Chris
--
Chris J Dixon Nottingham UK
ch...@cdixon.me.uk

Plant amazing Acers.

Mike Barnes

unread,
Apr 16, 2014, 10:03:26 AM4/16/14
to
My strategy is different. I'm assuming that BC will remain predominant
for the foreseeable future so I buy all BC bulbs. For the few ES sockets
I have, I use adapters, which are available cheaply on eBay. Yes the
bulb is lengthened but that's not actually a problem with any of the
fittings I have.

--
Mike Barnes
Cheshire, England

phil...@gmail.com

unread,
Apr 16, 2014, 9:43:22 AM4/16/14
to
What's the problem?

I just put E27 bulb holder into froogle and turned up loads. They all look like the nasty flimsy things they are though.

Philip

Clive Page

unread,
Apr 16, 2014, 12:53:56 PM4/16/14
to
Chris,

Thanks - those look possible. It hadn't occurred to me to look for a
cord set, and just throw away the bits I don't need. And, by the way,
the IKEA one *looks* like it might be E27, but they certainly don't want
to give you any information about it, do they?


--
Clive Page

Chris J Dixon

unread,
Apr 16, 2014, 1:27:23 PM4/16/14
to
Clive Page wrote:

>On 16/04/2014 14:47, Chris J Dixon wrote:
>> Are you near IKEA?
>>
>> http://www.ikea.com/gb/en/catalog/products/00067854/
>>
>> HEMMA Cord set, white £3

>Thanks - those look possible. It hadn't occurred to me to look for a
>cord set, and just throw away the bits I don't need. And, by the way,
>the IKEA one *looks* like it might be E27, but they certainly don't want
>to give you any information about it, do they?

Well, they do say

"Light source is sold separately. IKEA recommends LEDARE LED bulb
E27 400 lumen."

Brian Gaff

unread,
Apr 16, 2014, 1:55:19 PM4/16/14
to
Pardon my ignorance, but this switchover has happened since I lost my sight.
Are E27 the ones where the screw is isolated and there is a ring and a blob
on the bottom of the bulbs? I've seen these bulbs, well felt them and
wondered why, but I guess its to isolate the screw part as old es bulbs
used to be letal if a bit of the holder pr broke off.
If not then, I'll not lose sleep, but most of the ones in my house are two
pin BC except one stupid applience with three pin BC type that are now
almost unobtainable.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"Mike Barnes" <mikeba...@gmail.com> wrote in message
news:br7gtv...@mid.individual.net...

rbel

unread,
Apr 16, 2014, 4:00:17 PM4/16/14
to
On Wed, 16 Apr 2014 14:10:39 +0100, Clive Page <use...@page2.eu>
wrote:
This may help get away from the baked bakelite problem
http://www.tlc-direct.co.uk/Products/TLBPHslashES.html

--
rbel

Scott M

unread,
Apr 16, 2014, 5:58:16 PM4/16/14
to
Brian Gaff wrote:
> Pardon my ignorance, but this switchover has happened since I lost my sight.

It's not really a switchover. BC still rules in Britain but we've taken
to importing table top lamps and outdoor light fittings from abroad and
taking them as they come rather than getting a UK version made.

I haven't come across any Edison bulbs that you described. The outer
screw is live (well, hopefully neutral) all the way down the thread.

--
Scott

Where are we going and why am I in this handbasket?

Mike Tomlinson

unread,
Apr 17, 2014, 12:16:32 AM4/17/14
to
En el artículo <37otk9d0bf9bk4kbh...@4ax.com>, rbel
<rb...@rbel1.plus.com> escribió:

>This may help get away from the baked bakelite problem
>http://www.tlc-direct.co.uk/Products/TLBPHslashES.html

I wonder if that has an earth connection?

--
(\_/)
(='.'=)
(")_(")

PeterC

unread,
Apr 17, 2014, 3:06:49 AM4/17/14
to
Ikea also has a 3-cord and socket one for £7, so a bit cheaper if you need
3.
--
Peter.
The gods will stay away
whilst religions hold sway

rbel

unread,
Apr 17, 2014, 8:19:17 AM4/17/14
to
On Thu, 17 Apr 2014 05:16:32 +0100, Mike Tomlinson
<mi...@jasper.org.uk> wrote:

>En el artículo <37otk9d0bf9bk4kbh...@4ax.com>, rbel
><rb...@rbel1.plus.com> escribió:
>
>>This may help get away from the baked bakelite problem
>>http://www.tlc-direct.co.uk/Products/TLBPHslashES.html
>
>I wonder if that has an earth connection?

According to TLC they do.
--
rbel

Andrew Gabriel

unread,
Apr 18, 2014, 7:54:12 AM4/18/14
to
In article <limg6j$79v$1...@dont-email.me>,
"Brian Gaff" <brian...@gmail.com> writes:
> Pardon my ignorance, but this switchover has happened since I lost my sight.
> Are E27 the ones where the screw is isolated and there is a ring and a blob
> on the bottom of the bulbs? I've seen these bulbs, well felt them and
> wondered why, but I guess its to isolate the screw part as old es bulbs
> used to be letal if a bit of the holder pr broke off.

They are US double filament lamps. The screw thread is the common
and the tip and ring are the connections to each filamane. They
also have CFL's which work that way.

Never seen them in the UK.

> If not then, I'll not lose sleep, but most of the ones in my house are two
> pin BC except one stupid applience with three pin BC type that are now
> almost unobtainable.

Get the lampholder changed.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Clive Page

unread,
Apr 18, 2014, 11:28:32 AM4/18/14
to
On 16/04/2014 18:55, Brian Gaff wrote:
> Pardon my ignorance, but this switchover has happened since I lost my sight.
> Are E27 the ones where the screw is isolated and there is a ring and a blob
> on the bottom of the bulbs?

I called them E27 in my original message because I thought it was the
correct modern term, but actually I think it is just a fancy name for
what we used to call simply Edison Screw (ES). According to Wikipedia,
the E stands for Edison, and the 27 is the diameter in millimetres (of
which I doubt Mr Edison would approve). There is apparently also an E26
size in the USA which is said to be "mostly compatible" with E27.


--
Clive Page

kbrow...@gmail.com

unread,
Dec 22, 2018, 5:18:18 PM12/22/18
to

Rod Speed

unread,
Dec 22, 2018, 5:23:00 PM12/22/18
to


<kbrow...@gmail.com> wrote in message
news:441f3a9a-6bea-40c4...@googlegroups.com...
Plenty on aliexpress

Brian Gaff

unread,
Dec 23, 2018, 4:54:52 AM12/23/18
to
Nobody has actually designed a lamp holder which is safe with no bulb in it
of the ES or bayonet type to my mind, maybe the industry just wants fewer
people to fry their fingers?
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
bri...@blueyonder.co.uk
Blind user, so no pictures please
Note this Signature is meaningless.!
<kbrow...@gmail.com> wrote in message
news:441f3a9a-6bea-40c4...@googlegroups.com...

Scott

unread,
Dec 23, 2018, 4:57:22 AM12/23/18
to
On Sat, 22 Dec 2018 14:18:15 -0800 (PST), kbrow...@gmail.com wrote:

>https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F262181276950
>Found these on eBay Edison screw light fittings

Because they are a poor design that allows bulbs to work loose and
potentially exposes live metal?

Andy Burns

unread,
Dec 23, 2018, 5:23:03 AM12/23/18
to
Brian Gaff wrote:

> Nobody has actually designed a lamp holder which is safe with no bulb in it

MK make the shockguard BC holder that shutters the pins when the bulb is
removed, it's a little bulkier than a normal BC22 lampholder.

Scott

unread,
Dec 23, 2018, 5:51:22 AM12/23/18
to
On Sun, 23 Dec 2018 10:22:59 +0000, Andy Burns <use...@andyburns.uk>
wrote:
Is it made in England or Malaysia?

Andy Burns

unread,
Dec 23, 2018, 6:08:09 AM12/23/18
to
Scott wrote:

> Andy Burns wrote:
>
>> Brian Gaff wrote:
>>
>>> Nobody has actually designed a lamp holder which is safe with no bulb in it
>>
>> MK make the shockguard BC holder
>
> Is it made in England or Malaysia?

I'm not fussed.

Scott

unread,
Dec 23, 2018, 6:51:43 AM12/23/18
to
On Sun, 23 Dec 2018 11:29:01 -0000 (UTC), Jethro_uk
<jeth...@hotmailbin.com> wrote:
>I would have though the lack of locking mechanical security could lead to
>loose connections, arcing and a fire risk.

That was implied in 'allows bulbs to work loose'.

Scott

unread,
Dec 23, 2018, 6:52:57 AM12/23/18
to
On Sun, 23 Dec 2018 11:08:06 +0000, Andy Burns <use...@andyburns.uk>
wrote:
Still a question that is not entirely outside the permitted bandwidth
for a newsgroup thread, I would suggest.

Bob Eager

unread,
Dec 23, 2018, 7:02:39 AM12/23/18
to
On Sun, 23 Dec 2018 09:54:49 +0000, Brian Gaff wrote:

> Nobody has actually designed a lamp holder which is safe with no bulb in
> it of the ES or bayonet type to my mind, maybe the industry just wants
> fewer people to fry their fingers?

I have bayonet lamp holders which are safe. There is an internal shutter
which is only closed when the bulb is rotated into place.

I usually use the MK 1150WHI.

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

Robin

unread,
Dec 23, 2018, 7:06:34 AM12/23/18
to
On 23/12/2018 11:29, Jethro_uk wrote:
> On Sun, 23 Dec 2018 09:57:15 +0000, Scott wrote:
>
> I would have though the lack of locking mechanical security could lead to
> loose connections, arcing and a fire risk.
>

Well all your undergarments 'could' leap simultaneously one foot to the
left; but it's not very likely. So if such risks with E27 etc were
significant I would have thought there'd be clear and unequivocal
evidence by now given the length of time they've been in use and the
installed base across the world.

--
Robin
reply-to address is (intended to be) valid

charles

unread,
Dec 23, 2018, 7:28:39 AM12/23/18
to
In article <44qu1ehvsq2itr9u3...@4ax.com>,
I've just fitted an MK pull light switch which had "Made in China" moulded
into it.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

Scott

unread,
Dec 23, 2018, 7:30:16 AM12/23/18
to
On Sun, 23 Dec 2018 11:57:57 +0000 (GMT), charles
<cha...@candehope.me.uk> wrote:

>In article <44qu1ehvsq2itr9u3...@4ax.com>,
> Scott <newsg...@gefion.myzen.co.uk> wrote:
>> On Sun, 23 Dec 2018 10:22:59 +0000, Andy Burns <use...@andyburns.uk>
>> wrote:
>
>> >Brian Gaff wrote:
>> >
>> >> Nobody has actually designed a lamp holder which is safe with no bulb
>> >> in it
>> >
>> >MK make the shockguard BC holder that shutters the pins when the bulb is
>> >removed, it's a little bulkier than a normal BC22 lampholder.
>
>> Is it made in England or Malaysia?
>
>I've just fitted an MK pull light switch which had "Made in China" moulded
>into it.

Curiouser and curiouser, said Alice.

Tricky Dicky

unread,
Dec 23, 2018, 8:51:28 AM12/23/18
to
I understand that wheras with BC polarity did not apply, but with ES you had to observe polarity by connecting Live to the central terminal and neutral to the thread.

Richard

Robin

unread,
Dec 23, 2018, 9:12:24 AM12/23/18
to
On 23/12/2018 12:10, Tim Streater wrote:
> In article <1304a6ff-93ae-04fb...@outlook.com>, Robin
> No, they just put up with the increased fire risk. In the US and others
> of course, it's much worse again due to their use of cheeseparing 120V.
>

And the evidence of increased fire risk from Edison screw compared with
bayonet cap is....?

Robin

unread,
Dec 23, 2018, 9:16:06 AM12/23/18
to
On 23/12/2018 12:18, Jethro_uk wrote:
> On Sun, 23 Dec 2018 12:06:30 +0000, Robin wrote:
>
>> So if such risks with E27 etc were
>> significant I would have thought there'd be clear and unequivocal
>> evidence by now given the length of time they've been in use and the
>> installed base across the world.
>
> You assume the people that mandate change are working for the public
> good. I don't.

I wa not assuming that (or anything). I was looking for data.
>
> One narrative could be the ES design arose because it was the cheapest
> possible to deliver (probably using existing tooling). As it was
> introduced, any evidence of the risk would have been mixed in with other
> factors (given the novelty and rarity of electric lighting).
>
> By the time the risk from lose-arcing bulbs is emerging, there's an
> entire industry resting on their production. Any change is going to
> involve a lot of (shareholders) money.
>
> And that's how things remained.
>
> Of course now we have low energy bulbs, the risk is reduced - maybe
> eliminated. Giving the ES fitting - and the factories that produce for it
> - a competitive edge. Which is why we now see them when they were rare as
> hens teeth in the UK in the 70s and before.
>
> I'll drop my theory in the face of supporting evidence.
>

Oh it's a very nice theory. (But then so were phlogiston and
luminiferous aether). I'd just like some evidence to support it.

Tim Watts

unread,
Dec 23, 2018, 9:18:49 AM12/23/18
to
Hager-Ashley have had safe BC holders for years. Even the ES type can be
made safer (side contact at the base, plastic threads).

--
Email does not work

Scott

unread,
Dec 23, 2018, 9:39:56 AM12/23/18
to
On Sun, 23 Dec 2018 05:51:26 -0800 (PST), Tricky Dicky
<tricky...@sky.com> wrote:

>I understand that wheras with BC polarity did not apply, but with ES you had to observe polarity by connecting Live to the central terminal and neutral to the thread.
>
And how do you do that if a lamp is fitted with a two-pin plug, such
as a europlug?

Terry Casey

unread,
Dec 23, 2018, 10:34:18 AM12/23/18
to
In article <g89jq6...@mid.individual.net>, t...@example.com
says...
>
> Even the ES type can be made safer (side contact at the
> base, plastic threads).

They look like unglazed porcelain to me.

Don't they also tend to have switching arangement in the base
these days so that the centre contact is only energised when
the bulb is screwed fully home?

--

Terry

---
This email has been checked for viruses by AVG.
https://www.avg.com

Scott

unread,
Dec 23, 2018, 10:37:32 AM12/23/18
to
On Sun, 23 Dec 2018 15:34:15 -0000, Terry Casey
<k.t...@example.invalid> wrote:

>In article <g89jq6...@mid.individual.net>, t...@example.com
>says...
>>
>> Even the ES type can be made safer (side contact at the
>> base, plastic threads).
>
>They look like unglazed porcelain to me.
>
>Don't they also tend to have switching arangement in the base
>these days so that the centre contact is only energised when
>the bulb is screwed fully home?

Yes, but how do you know that the centre contact carries the live?

Richard

unread,
Dec 23, 2018, 10:45:01 AM12/23/18
to
Stick your finger in?

Scott

unread,
Dec 23, 2018, 10:56:34 AM12/23/18
to
I suspect it was done that way at one time. I think that's more okay
with 110 volts than it is with European voltage.

Rod Speed

unread,
Dec 23, 2018, 11:37:36 AM12/23/18
to


"Jethro_uk" <jeth...@hotmailbin.com> wrote in message
news:pvnrht$sh8$1...@dont-email.me...
> On Sun, 23 Dec 2018 09:57:15 +0000, Scott wrote:
>
> I would have though the lack of locking mechanical security could lead to
> loose connections, arcing and a fire risk.

In practice I've never had anything like that with mine
but have had some BCs where the metal the bulb prongs
go into isnt good enough so the bulb does that. Never
had that with ES because its harder to stuff that up.

Tim J

unread,
Dec 23, 2018, 12:22:22 PM12/23/18
to


"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
news:hsav1e9u3frrl190t...@4ax.com...
You don't need to with the side contact at the base.

%

unread,
Dec 23, 2018, 12:33:05 PM12/23/18
to
hi scott

Scott

unread,
Dec 23, 2018, 12:34:53 PM12/23/18
to
I thought the argument was that it might be possible to touch the
'screw' part of the bulb?

%

unread,
Dec 23, 2018, 12:44:32 PM12/23/18
to
you can

Tim J

unread,
Dec 23, 2018, 12:55:01 PM12/23/18
to


"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
news:5ohv1elfg47hns6bc...@4ax.com...
Doesn't matter when the screw part is plastic
or ceramic with a side contact at the bottom.

Scott

unread,
Dec 23, 2018, 1:12:06 PM12/23/18
to
On Mon, 24 Dec 2018 04:54:50 +1100, "Tim J" <tgj...@mail.com> wrote:

>
>
>"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
>news:5ohv1elfg47hns6bc...@4ax.com...
>> On Mon, 24 Dec 2018 04:15:48 +1100, "Tim J" <tgj...@mail.com> wrote:
>>
>>>
>>>
>>>"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
>>>news:hsav1e9u3frrl190t...@4ax.com...
>>>> On Sun, 23 Dec 2018 15:34:15 -0000, Terry Casey
>>>> <k.t...@example.invalid> wrote:
>>>>
>>>>>In article <g89jq6...@mid.individual.net>, t...@example.com
>>>>>says...
>>>>>>
>>>>>> Even the ES type can be made safer (side contact at the
>>>>>> base, plastic threads).
>>>>>
>>>>>They look like unglazed porcelain to me.
>>>>>
>>>>>Don't they also tend to have switching arangement in the base
>>>>>these days so that the centre contact is only energised when
>>>>>the bulb is screwed fully home?
>>>>
>>>> Yes, but how do you know that the centre contact carries the live?
>>>
>>>You don't need to with the side contact at the base.
>>
>> I thought the argument was that it might be possible to touch the
>> 'screw' part of the bulb?
>
>Doesn't matter when the screw part is plastic
>or ceramic with a side contact at the bottom.

True obviously in that particular set of circumstances but I have seen
plenty of ES bulbs where the construction is metal. I think we are
discussing the safety of the system in general rather than the
specifics of certain bulb types.

Tim J

unread,
Dec 23, 2018, 1:36:57 PM12/23/18
to


"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
news:mrjv1e1ul9pj46lin...@4ax.com...
We are actually talking about the safety of particular bulb
socket types and if you care about the risk with ES sockets,
its easy to use ES sockets which have no risk.

%

unread,
Dec 23, 2018, 1:47:24 PM12/23/18
to
hi scott

Scott

unread,
Dec 23, 2018, 2:28:46 PM12/23/18
to
Maybe I have missed something, but how do you ensure there is no risk
of touching the metal part of the bulb if the polarity is reversed? I
appreciate the risk is low for pendant lights on the ceiling but for a
lamp fitted with a non-polarised plug (such as a europlug) polarity
must be 50/50.

And how do you use 'ES sockets which have no risk' if a table lamp is
fully manufactured on delivery? Can they be retrofitted?

Peeler

unread,
Dec 23, 2018, 2:35:45 PM12/23/18
to
On Mon, 24 Dec 2018 03:37:25 +1100, cantankerous trolling geezer Rot Speed,
the auto-contradicting senile sociopath, blabbered, again:


>> I would have though the lack of locking mechanical security could lead to
>> loose connections, arcing and a fire risk.
>
> In practice I've never had anything like that with mine

Looks like hardly anyone gives a shit anymore about what you have to say,
what you had or didn't have, senile Rot. Slowly things on Usenet are
turning out for you like things have turned out for you in real life
already long time ago, you obnoxious senile pest!

--
Marland addressing bullshitting senile Rot:
"Stay in your wet paper bag you thick twit."
MID: <fv9f8u...@mid.individual.net>

Bob Eager

unread,
Dec 23, 2018, 4:25:35 PM12/23/18
to
On Sun, 23 Dec 2018 19:28:39 +0000, Scott wrote:

> Maybe I have missed something, but how do you ensure there is no risk of
> touching the metal part of the bulb if the polarity is reversed? I
> appreciate the risk is low for pendant lights on the ceiling but for a
> lamp fitted with a non-polarised plug (such as a europlug) polarity must
> be 50/50.

With a contact only at the base (inner end) of the screw thread in the
HOLDER, the metal thread on the BULB doesn't become (potentially) live
until the bulb is nearly all the way in (and presumabley the metal part
is now shrouded).

Tim J

unread,
Dec 23, 2018, 4:38:48 PM12/23/18
to


"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
news:86ov1eh0qmi1fthcg...@4ax.com...
By ensuring that it isnt in contact with the side contact until it has
been screwed right into the socket and having the non conducting
screw socket cover the metal part of the bulb completely.

I
> appreciate the risk is low for pendant lights on the ceiling but for a
> lamp fitted with a non-polarised plug (such as a europlug) polarity
> must be 50/50.
>
> And how do you use 'ES sockets which have no risk' if a table lamp is
> fully manufactured on delivery? Can they be retrofitted?

You can obviously only buy table lamps which have non
conducting screw sockets and side contact that only contact
the bulb when the bulb is fully screwed into the socket.

Scott

unread,
Dec 24, 2018, 4:37:06 AM12/24/18
to
Really? Is there a recognised international marking to make consumers
who do not have electrical skills aware of this?

Tim J

unread,
Dec 24, 2018, 4:47:31 AM12/24/18
to


"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
news:14a12elne367mcjur...@4ax.com...
Yep.

Is there a recognised international marking to make consumers
> who do not have electrical skills aware of this?

Don't need one.

Scott

unread,
Dec 24, 2018, 5:43:23 AM12/24/18
to
Okay, I'll ask around tomorrow how to see how many of my friends would
feel competent in carrying out this task: 'Would you be able to
identiify a table lamp with non conducting screw sockets and side
contact?' .

Tricky Dicky

unread,
Dec 24, 2018, 6:01:54 AM12/24/18
to
>
>And how do you do that if a lamp is fitted with a two-pin plug, such
>as a europlug

Yes it is peculiar that ES is widely adopted in Europe, in the USA system for which it was developed they at least have polarised plugs.

Richard

charles

unread,
Dec 24, 2018, 6:44:58 AM12/24/18
to
In article <2110b4ff-f7e9-418d...@googlegroups.com>, Tricky
Not always - the 2 pin (either way up) is quite common.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle

Scott

unread,
Dec 24, 2018, 12:09:37 PM12/24/18
to
Is USA +55V / -55V (you know what I mean)?

ARW

unread,
Dec 24, 2018, 12:18:55 PM12/24/18
to
On 23/12/2018 21:25, Bob Eager wrote:
> On Sun, 23 Dec 2018 19:28:39 +0000, Scott wrote:
>
>> Maybe I have missed something, but how do you ensure there is no risk of
>> touching the metal part of the bulb if the polarity is reversed? I
>> appreciate the risk is low for pendant lights on the ceiling but for a
>> lamp fitted with a non-polarised plug (such as a europlug) polarity must
>> be 50/50.
>
> With a contact only at the base (inner end) of the screw thread in the
> HOLDER, the metal thread on the BULB doesn't become (potentially) live
> until the bulb is nearly all the way in (and presumabley the metal part
> is now shrouded).
>
>
>
What when you unscrew it?

Called at the electrical wholesalers today and someone in the shop asked
for a E27 pendant holder. They can get them but they were not in stock.

My first question was "Have you got any E40 pendant holders?"

Oddly enough the hydroponics shop next door did have them.

--
Adam

tabb...@gmail.com

unread,
Dec 24, 2018, 12:25:08 PM12/24/18
to
no. 110v or 110-0-110 split phase.


NT

tabb...@gmail.com

unread,
Dec 24, 2018, 12:27:10 PM12/24/18
to
E40 has long been standard for a lot of high power lamps including discharge grow lamps. It's been around over a century.


NT

Rod Speed

unread,
Dec 24, 2018, 1:25:27 PM12/24/18
to
Tricky Dicky <tricky...@sky.com> wrote
But don’t mandate which of the pins is active and which is neutral.

Tim J

unread,
Dec 24, 2018, 2:31:07 PM12/24/18
to


"Scott" <newsg...@gefion.myzen.co.uk> wrote in message
news:0l422etbaakp70aa5...@4ax.com...
Nope, its actually +115V / -115V but not on those 2 pin plugs.

Tim Watts

unread,
Dec 24, 2018, 5:00:15 PM12/24/18
to
No it's 110-0-110 with 220V sockets/appliances being powered phase-antiphase

(Though I have seen some references to 2 of the 3 120degree phases
rarely being used for the higher voltage giving some 190V)

--
Email does not work

PeterC

unread,
Dec 25, 2018, 2:23:29 AM12/25/18
to
Assuming still stocked, Ikea has singles or threes already wired, v. cheap.
https://www.ikea.com/gb/en/search/?k=e27&N=0&No=120&Nr=AND%28content.type%3Ap%2Csku.browsable%3A1%29&summary=true
--
Peter.
The gods will stay away
whilst religions hold sway

Scott

unread,
Dec 25, 2018, 4:59:55 AM12/25/18
to
Thanks. I think I knew that at one time. Maybe I was thinking of
building sites.

Merry Christmas to all in uk.d-i-y.
0 new messages