Strange single pin socket

Discussion in 'Electrics UK' started by pmx_super, 22 May 2021.

  1. pmx_super

    pmx_super

    Joined:
    27 Oct 2003
    Messages:
    229
    Thanks Received:
    0
    Country:
    United Kingdom
    I've just moved into a new house and it has these in the bedrooms. Can anyone identity it?

    I'm guessing it's for a light, in which case I'm wondering if it may be switched from the light switch. Obviously I don't have a suitable plug connector to test it out.

    Pretty sure they'll come out once I get a professional in to modernise the installation, but in the meantime can anyone satisfy my curiosity!? 16217064481938325533564667713894.jpg
     
  2. Sponsored Links
  3. Colin Brenton

    Colin Brenton

    Joined:
    1 Mar 2008
    Messages:
    169
    Thanks Received:
    33
    Country:
    United Kingdom
    It's an old electric clock connector. Undoing the screw in the middle allows the plug to be pulled out, and the flex to be connected to the back of it and fed through the hole - so you do in fact have a plug already :D
     
    • Thanks Thanks x 1
  4. Harry Bloomfield

    Harry Bloomfield

    Joined:
    30 Dec 2018
    Messages:
    9,538
    Thanks Received:
    1,289
    Country:
    United Kingdom
    It will have a built-in fuse, of 1amp probably. The fuse is likely obsolete.
     
  5. ericmark

    ericmark

    Joined:
    27 Jan 2008
    Messages:
    18,899
    Thanks Received:
    1,776
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    Still for sale but rather expensive.
     
    • Thanks Thanks x 1
  6. 333rocky333

    333rocky333

    Joined:
    12 Jan 2008
    Messages:
    8,458
    Thanks Received:
    912
    Location:
    Essex
    Country:
    United Kingdom
    An old verision of a MK995, Likely used for a Table lamp, possibly switched on the lighting circuit
     
  7. 333rocky333

    333rocky333

    Joined:
    12 Jan 2008
    Messages:
    8,458
    Thanks Received:
    912
    Location:
    Essex
    Country:
    United Kingdom
    BS.646:1958 fuses
    MK part K601 for a 1 amp Green
    Mk part K602 for a 2 amp Yellow
     
  8. sparkwright

    sparkwright

    Joined:
    20 Aug 2009
    Messages:
    8,949
    Thanks Received:
    1,128
    Location:
    Dorset
    Country:
    United Kingdom
    Do you have any switches in the bedrooms that may control these clock connectors (in case they were intended for table lamps)?
     
    Last edited: 22 May 2021
  9. winston1

    winston1

    Joined:
    11 Jan 2010
    Messages:
    7,315
    Thanks Received:
    567
    Location:
    London
    Country:
    United Kingdom
    Standard 20 x 5 mm fuses will also fit.
     
  10. Sponsored Links
  11. pmx_super

    pmx_super

    Joined:
    27 Oct 2003
    Messages:
    229
    Thanks Received:
    0
    Country:
    United Kingdom
    Thanks! If it was safe for a homeowner in the 70s (?) then I'm willing to give it a try. Dumb question... Is a clock connector a connector for a clock!?
     
  12. pmx_super

    pmx_super

    Joined:
    27 Oct 2003
    Messages:
    229
    Thanks Received:
    0
    Country:
    United Kingdom
    No switches. I'm going to wire a lamp in there and see if the main ight switch does anything. I suppose you would never have cause to turn off a clock
     
  13. sparkwright

    sparkwright

    Joined:
    20 Aug 2009
    Messages:
    8,949
    Thanks Received:
    1,128
    Location:
    Dorset
    Country:
    United Kingdom
    For convenience, and since at least one of these clock connectors is cracked, you could replace with a 5 amp socket and plug (although it appears the back boxes in the wall won't be as standard).
     
  14. conny

    conny

    Joined:
    30 Jun 2008
    Messages:
    14,269
    Thanks Received:
    831
    Location:
    Suffolk
    Country:
    United Kingdom
    If you use a lamp you will need one with an in-line switch as it is unlikely to be controlled by your standard light switch.
    It you had a clock wired in and turned your light off the clock would also go off.
     
  15. 333rocky333

    333rocky333

    Joined:
    12 Jan 2008
    Messages:
    8,458
    Thanks Received:
    912
    Location:
    Essex
    Country:
    United Kingdom
    They were intended for a clock, as they are quite flush and will sit behind a mains powered wall clock, when they were used as intended at about 2 metre high.
    Though there use is not limited and could have been used at low level for a Tabletop Alarm clock or for a lamp.
    It may be permanently live rather than switched as Table lamps tended to have there own switch either on the lampholder or in the cable, if intended for a clock then obviously likely not switched
     
  16. JohnD

    JohnD

    Joined:
    15 Nov 2005
    Messages:
    75,047
    Thanks Received:
    4,354
    Location:
    Crossgates, Europe
    Country:
    Cook Islands
    were also quite popular for ventilation fans.

    in large offices it meant they could easily be individually unplugged for cleaning, repair or replacement with no need to isolate the circuit.

    In the old days, some offices had multiple electric wall clocks, set to local time for London, Paris, New York, Dallas, Frankfurt etc where they might be dealing with overseas traders or correspondent companies

    One place I worked in, after reassignment of offices, the clocks got relabelled by some jokers to show local time in London, Basingstoke, Reading, Thatcham, Crewe etc.
     
  17. SUNRAY

    SUNRAY

    Joined:
    28 Jul 2009
    Messages:
    5,854
    Thanks Received:
    451
    Location:
    Kent
    Country:
    United Kingdom
    My experience differs, I know they are only 1mm longer but I found the plug did not have that much space. Also 20mm fuses are a little smaller diameter and likely to be a poor fit. Using the wrong fuse is a botch.
     
Loading...

Share This Page