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[OT] Dual-Gang switched 13A + USB sockets



 
 
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  #1  
Old October 5th 17, 09:17 PM posted to uk.tech.digital-tv
pinnerite
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Posts: 93
Default [OT] Dual-Gang switched 13A + USB sockets

I need to partially rewire my apartment. I am tempted to replace some old
double-switched sockets with those that incorporate USB sockets.

Some are described as Switched USB Socket 13A 2-gang + 2 USB.

Can I assume that the USB sockets on these are actually switched and carry
no current until a plug is inserted?

If you have any experience of these things I would appreciate the benefit of
your know-how.



--
Mageia 5.1 for x86_64, Kernel:4.4.82-desktop-1.mga5
KDE version 4.14.5 on an AMD Phenom II X4 Black edition.

  #2  
Old October 5th 17, 10:22 PM posted to uk.tech.digital-tv
Woody[_5_]
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Posts: 1,800
Default [OT] Dual-Gang switched 13A + USB sockets


"Pinnerite" wrote in message
news
I need to partially rewire my apartment. I am tempted to replace some
old
double-switched sockets with those that incorporate USB sockets.

Some are described as Switched USB Socket 13A 2-gang + 2 USB.

Can I assume that the USB sockets on these are actually switched and
carry
no current until a plug is inserted?

If you have any experience of these things I would appreciate the
benefit of
your know-how.


The USB sockets are permanently powered, the switches only operate on
the 13A outlets.

Also note that you will need at least a 35mm box to carry one of these
outlets as they are rather thicker. If your installation does not have
this depth of box then you may have to get spacer collars to fit
between the socket and the wall although they are a bit like rocking
horse **** to find. You will of course also need longer screws whether
you use the spacer or not.



--
Woody

harrogate3 at ntlworld dot com


  #3  
Old October 6th 17, 07:23 AM posted to uk.tech.digital-tv
Andy Burns[_12_]
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Posts: 445
Default [OT] Dual-Gang switched 13A + USB sockets

Pinnerite wrote:

I need to partially rewire my apartment. I am tempted to replace some old
double-switched sockets with those that incorporate USB sockets.

How often do mains sockets typically need replacing 40-50 years maybe?

How often do USB power supply specs change (500mA, 1A, 2A, 3A, etc etc)
every 2 years maybe?
  #4  
Old October 6th 17, 07:58 AM posted to uk.tech.digital-tv
Brian Gaff
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Posts: 6,956
Default [OT] Dual-Gang switched 13A + USB sockets

Yes and I hate this idea, looks to me like an accident waiting to happen.
Tiny switch mode psus kicking out crud all the time and one large mains
spike and goodness knows what is going to be coming out of that usb.

Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Woody" wrote in message
news

"Pinnerite" wrote in message
news
I need to partially rewire my apartment. I am tempted to replace some old
double-switched sockets with those that incorporate USB sockets.

Some are described as Switched USB Socket 13A 2-gang + 2 USB.

Can I assume that the USB sockets on these are actually switched and
carry
no current until a plug is inserted?

If you have any experience of these things I would appreciate the benefit
of
your know-how.


The USB sockets are permanently powered, the switches only operate on the
13A outlets.

Also note that you will need at least a 35mm box to carry one of these
outlets as they are rather thicker. If your installation does not have
this depth of box then you may have to get spacer collars to fit between
the socket and the wall although they are a bit like rocking horse **** to
find. You will of course also need longer screws whether you use the
spacer or not.



--
Woody

harrogate3 at ntlworld dot com



  #5  
Old October 6th 17, 08:00 AM posted to uk.tech.digital-tv
Brian Gaff
external usenet poster
 
Posts: 6,956
Default [OT] Dual-Gang switched 13A + USB sockets

Yes and of course everyone is going toward these smaller usbs now. Nothing
stays the same.
I'd not give one the time of day, personally. The wall wart can be
exchanged. I'd like to perhaps see a wall wart with a usb and perhaps a home
hub type control. I'd not like this sort of stuff to be in my wall and
needing work on the house wiring to replace.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Andy Burns" wrote in message
...
Pinnerite wrote:

I need to partially rewire my apartment. I am tempted to replace some old
double-switched sockets with those that incorporate USB sockets.

How often do mains sockets typically need replacing 40-50 years maybe?

How often do USB power supply specs change (500mA, 1A, 2A, 3A, etc etc)
every 2 years maybe?



  #6  
Old October 6th 17, 08:20 AM posted to uk.tech.digital-tv
Jeff Layman[_2_]
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Posts: 677
Default [OT] Dual-Gang switched 13A + USB sockets

On 05/10/17 21:17, Pinnerite wrote:
I need to partially rewire my apartment. I am tempted to replace some old
double-switched sockets with those that incorporate USB sockets.

Some are described as Switched USB Socket 13A 2-gang + 2 USB.

Can I assume that the USB sockets on these are actually switched and carry
no current until a plug is inserted?

If you have any experience of these things I would appreciate the benefit of
your know-how.


Somewhat OT to your question, but what is the RFI like from these
unswitchable USB power supplies? There's an interesting video here
showing the interference from a cheap and nasty power supply compared to
a branded one. OK, it's not USB but the principle is the same. What I
found interesting was that there was a fair amount of RFI even when the
rubbish SMPS was unloaded. That's somewhat similar to the situation with
these built-in mains-socket USB power supplies. I just hope they're well
filtered. At least you can unplug a noisy wallwart!

--

Jeff
  #7  
Old October 6th 17, 01:04 PM posted to uk.tech.digital-tv
Dave W
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Posts: 265
Default [OT] Dual-Gang switched 13A + USB sockets


"Jeff Layman" wrote in message
news
On 06/10/17 08:20, Jeff Layman wrote:
On 05/10/17 21:17, Pinnerite wrote:
I need to partially rewire my apartment. I am tempted to replace some
old
double-switched sockets with those that incorporate USB sockets.

Some are described as Switched USB Socket 13A 2-gang + 2 USB.

Can I assume that the USB sockets on these are actually switched and
carry
no current until a plug is inserted?

If you have any experience of these things I would appreciate the
benefit of
your know-how.


Somewhat OT to your question, but what is the RFI like from these
unswitchable USB power supplies? There's an interesting video here
showing the interference from a cheap and nasty power supply compared to
a branded one. OK, it's not USB but the principle is the same. What I
found interesting was that there was a fair amount of RFI even when the
rubbish SMPS was unloaded. That's somewhat similar to the situation with
these built-in mains-socket USB power supplies. I just hope they're well
filtered. At least you can unplug a noisy wallwart!


Forgot the link! It was supposed to be:
https://www.ukqrm.org.uk/smp


The link should be https://www.ukqrm.org.uk/smps.php
Well worth watching both videos on there.
--
Dave W


  #8  
Old October 6th 17, 01:45 PM posted to uk.tech.digital-tv
Jeff Layman[_2_]
external usenet poster
 
Posts: 677
Default [OT] Dual-Gang switched 13A + USB sockets

On 06/10/17 13:04, Dave W wrote:

The link should be https://www.ukqrm.org.uk/smps.php
Well worth watching both videos on there.


Thanks. Sure is a Fat Finger Friday today!

--

Jeff
  #9  
Old October 6th 17, 01:47 PM posted to uk.tech.digital-tv
R. Mark Clayton[_2_]
external usenet poster
 
Posts: 546
Default [OT] Dual-Gang switched 13A + USB sockets

On Thursday, 5 October 2017 22:21:44 UTC+1, Woody wrote:
"Pinnerite" wrote in message
news
I need to partially rewire my apartment. I am tempted to replace some
old
double-switched sockets with those that incorporate USB sockets.

Some are described as Switched USB Socket 13A 2-gang + 2 USB.

Can I assume that the USB sockets on these are actually switched and
carry
no current until a plug is inserted?

If you have any experience of these things I would appreciate the
benefit of
your know-how.


The USB sockets are permanently powered, the switches only operate on
the 13A outlets.


Are they?

I rather hoped the better ones only powered the socket when the shield was lifted.


Also note that you will need at least a 35mm box to carry one of these
outlets as they are rather thicker. If your installation does not have
this depth of box then you may have to get spacer collars to fit
between the socket and the wall although they are a bit like rocking
horse **** to find. You will of course also need longer screws whether
you use the spacer or not.



--
Woody

harrogate3 at ntlworld dot com


  #10  
Old October 6th 17, 06:03 PM posted to uk.tech.digital-tv
Indy Jess John
external usenet poster
 
Posts: 1,241
Default [OT] Dual-Gang switched 13A + USB sockets

On 06/10/2017 08:20, Jeff Layman wrote:

Somewhat OT to your question, but what is the RFI like from these
unswitchable USB power supplies? There's an interesting video here
showing the interference from a cheap and nasty power supply compared to
a branded one. OK, it's not USB but the principle is the same. What I
found interesting was that there was a fair amount of RFI even when the
rubbish SMPS was unloaded. That's somewhat similar to the situation with
these built-in mains-socket USB power supplies.


A number of years ago, my PC was using a CRT display, which worked OK
but took a lot of room. Idly flicking through the local paper one day I
noticed a PC for sale, working and complete with keyboard, mouse and TFT
monitor The asking price was less than half the price of the cheapest
TFT monitor on the market at the time, so I answered the ad and bought
it having had it demonstrated as working. The seller thought it was
taking up too much room and had invested in a laptop, so he was getting
rid of the desktop tower and accessories.

Back home, I swapped my CRT monitor on my PC for the TFT monitor from
the newly acquired machine and it worked perfectly. I then tried the
CRT monitor on the newly acquired machine, and with a tweak of the
refresh rate that gave me a second usable computer, except that there
was nowhere to put it permanently within cable reach of the router and
it had no wireless capability. So I invested in a Through The Mains
ethernet connection pair and put it in an upstairs room, and then set up
a file sharing capability and arranged an automatic back-up of my normal
PC onto the spare PC's disc. So far so good.

Nearly a year later I had my arm twisted to give a presentation to a
social group, and realised very quickly that it would not be practical
to use a desktop but I had to have something capable of connecting to
the social club projector, so I bought a refurbished cheap Toshiba Tecra
from a company that specialised in recycling old computers. It came
with a power supply "for Toshiba" rather than the native Toshiba unit,
and the first time I plugged it into the mains and switched it on the
Through The Mains ethernet connection lost carrier. The fake Toshiba
power supply powered the Toshiba laptop OK, but threw so much
interference into the mains that the house mains wiring became incapable
of passing data. I eventually bought an extra long ethernet cable which
I ran up the stairs to replace the Through The Mains units.

As for the original question, I looked up the specification details for
the unit available from Screwfix.
http://www.free-instruction-manuals....pa_1496545.pdf
It says:
3.1A total output, shared across 2 outlets
USB charger stand-by power made when not in use
2 x Type A, 5V USB sockets
With smart USB connectivity
Standby mode when device is fully charged
Auto detects USB device & adjusts charging pattern to suit

So it looks like it goes into quiescent mode, but the USB facility is
completely independent of the on/off switches for the mains sockets.

Jim
 




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