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Wrong polarity on kitchen edison batten holders:Coding.

hertzal123
Doing a condition report where the diy tenant has gone mad with surface plastic conduit downstairs to

add extra light points to varius rooms.In the kitchen are 6 edison holders on ceiling besa boxes.Noticed polarity

was wrong on the 1st one checked.My 1st thought for a coding was C2,but the lamp would need removing to

expose the live terminals,the same as a bc lampholder,which has the same danger of touching live parts .So would C3 be more appropriate?The live terminal

contacts when the lamp is fully inserted.

                                                    Regards,

                                                           Hz
  • 0
    That's an interesting one. We have just been discussing lamp-holders.


    I suggest C1 or C3.


    The idea with ES is that the line is the central pin so that a finger, for example, comes into contact with N before L and any shock is just across the finger tip.


    Quite right that in normal use, no conductor is exposed. But consider a broken lamp. When you reach up with a pair of pliers, you grasp L instead of N.


    In practical terms, with the lamp-holders mounted on BESA boxes, it should be easy enough to fix - just charge an extra tenner or two.
  • 0
    559.5.1.206.


    Can the outer threaded metal ring of a lamp be touched?


    Is the lamp holder compliant with BS EN 60238?


    Z.
  • 0
    C2
  • 0
    hertzal123:

    Doing a condition report where the diy tenant has gone mad with surface plastic conduit downstairs to

    add extra light points to varius rooms.In the kitchen are 6 edison holders on ceiling besa boxes.Noticed polarity

    was wrong on the 1st one checked.My 1st thought for a coding was C2,but the lamp would need removing to

    expose the live terminals,the same as a bc lampholder,which has the same danger of touching live parts .So would C3 be more appropriate?The live terminal

    contacts when the lamp is fully inserted.

                                                        Regards,

                                                               Hz


    Zoom has it right ... the polarity issue doesn't apply to some ES lampholders. If the lampholder complies with BS EN 60238, AND is either E14 or E27, then there is no problem. Regulation 559.5.1.206 and 643.6 (ii)..


  • 0
    gkenyon:
    hertzal123:

    Doing a condition report where the diy tenant has gone mad with surface plastic conduit downstairs to

    add extra light points to varius rooms.In the kitchen are 6 edison holders on ceiling besa boxes.Noticed polarity

    was wrong on the 1st one checked.My 1st thought for a coding was C2,but the lamp would need removing to

    expose the live terminals,the same as a bc lampholder,which has the same danger of touching live parts .So would C3 be more appropriate?The live terminal

    contacts when the lamp is fully inserted.

                                                        Regards,

                                                               Hz


    Zoom has it right ... the polarity issue doesn't apply to some ES lampholders. If the lampholder complies with BS EN 60238, AND is either E14 or E27, then there is no problem. Regulation 559.5.1.206 and 643.6 (ii)..




    Agreed - any vaguely modern E27/E14 lampholder won't have a metal threaded ring contact, but two contacts at the base of the holder and a plastic thread for holding the lamp base - so both the L and N are similarly recessed.


       - Andy.


  • 0
    Many thanks for all the replies,its a long time since I,ve seen an E27 holder with a metal thread,come to think of it.

                                                                                                                            Regards,

                                                                                                                                   Hz
  • 0
    hertzal123:

    Many thanks for all the replies,its a long time since I,ve seen an E27 holder with a metal thread,come to think of it.

                                                                                                                            Regards,

                                                                                                                                   Hz




    Have a look on Fleabay

    f7a44a7011c2cbb6b2ccbbd50ea143e8-original-c18e8708-9c61-4404-a58e-86039b3fa315.png


  • 0
    How about a handy GU10 to E27 adapter?

    6fcb9a5c729d1c685129a8f240dc1aa6-original-c6638d2a-2c9d-4007-9f1a-23bbd0a896e3.jpg
  • 0
    OK ok - perhaps I should have said "any vaguely modern standards compliant E27/E14 lampholder"...

       - Andy.
  • 0
    So there I was last week up a step-ladder using all three hands outstretched to poke my probes into an ES lamp-holder for an eternity whilst 3 Lo did its thing measuring Zs ...


    The outermost screw thread was metal, but it wasn't connected to N. I had to probe deeper for the one that was.


    It wasn't made any easier by the fact that once the (outdoors) lamp-holder was fitted to the wall, the paint made getting a good earth nigh on impossible.

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