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Discuss 13A switched Sockets with USB, Do the USB sockets work when switches are off? in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. w0z
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    w0z Regular EF Member

    Location:
    uk
    Hi
    Are the USB sockets permanently powered irrespective of whether the switch is on?
    Anyone done any power measurements on one when nothing is plugged into the usb?
    Can they withstand insulation resistance tests? (if so up to what voltage?)
     
  2. SparkyChick
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    SparkyChick Making a banana smoothy for my fave gorilla Electrician's Arms

    Location:
    South Wales
    Business Name:
    SparkyChick
    As far as I'm aware, the USB sockets are powered on all the time.

    Power measurements, no.

    Insulation resistance... depends on the make and model I believe. I installed some BG units on Tuesday, they can withstand 500v IR testing and will apparently give a result of 10Mohm (on the L-N test only I believe). Others I've installed have to be removed from circuit (on the instruction of the manufacturer).

    Hope that helps a little :)
     
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  3. w0z
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    w0z Regular EF Member

    Location:
    uk
    Thanks SC, I suspected they might be on all the time, I haven't looked at one yet, I assume there is no way to disconnect the USB part without disconnecting the socket? Bit of a pain really as the test wouldn't throw up insulation breakdown within the socket (unlikely now but who knows in 5 years when it's had a hammering)
     
  4. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    cheshire/staffordshire
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    Telectrix
    you worry too much. have a beer.
     
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  5. w0z
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    w0z Regular EF Member

    Location:
    uk
    That's very generous of you! Mine's a pint.
     
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  6. rsgaz
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    rsgaz Regular EF Member

    Location:
    UK
  7. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    Just don’t fit sockets with built in usb .....
     
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  8. w0z
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    w0z Regular EF Member

    Location:
    uk
    I agree, the same philosophy should have been applied to recently replacing ceiling downlighters (not that I'm suggesting ceiling downlighters should ever have a usb port) but sadly the only way to cover the original huge holes made by an "enthusiastic" electrician who cut them an inch larger than they needed to be (without a major repair job) was to fit some led 'downlights' (beam was very diffuse so I hesitate to call them downlights, more down and sideways lights). However no changing the lamp when they fail (as one now has), the entire fitting has to be changed. I hate that.
    I'd rather have kept the electronics within a replaceable lamp.
    May as well ask while I'm here, although it's a bit late now, does anyone know of a fitting which takes led gu10's or E27's but has a cutout of between 100 and 115mm?
     
  9. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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  10. w0z
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    w0z Regular EF Member

    Location:
    uk
    Thanks, looked at similar but was voted down.
     
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