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Underfloor Bus Bar Systems

Bob Cowie
The Definition in the Regulations for a Socket states " A Device, provided with Female Contacts, which is intended to be installed with the fixed wiring, and intended to receive a plug. A Luminaire track system is not regarded as a socket-outlet system"

From the above it would be my understanding that the Tap-Offs on an underfloor Bus Bar system are considered to be sockets. The exclusion of Luminaire track systems also appears to support this viewpoint as it infers that power Underfloor Bus Bar should be classed as sockets.
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    Nice try Graham!


    I certainly agree with the sentiments.


    I'm still not entirely convinced that BS 7671's working is clear though - especially when the likes of MK describe the tap off points in their system as "sockets" and the tap offs typically supply flex (if contained within flexible conduit). http://www.mkelectric.com/en-gb/Products/mkpowerdistributionsystem/Documents/Interact%20UnderFloor%20Power.pdf

    Seemingly some of the "tap offs" can contain 13A fuses - so could in theory be used to supply (portable) appliances directly - making the fundamental differences between them an say a 13A plug seem even less clear (maybe the arrangement should be considered more like a FCU serving an appliance rather than a plug & socket).


     - Andy.
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    Nice try Graham!


    I certainly agree with the sentiments.


    I'm still not entirely convinced that BS 7671's working is clear though - especially when the likes of MK describe the tap off points in their system as "sockets" and the tap offs typically supply flex (if contained within flexible conduit). http://www.mkelectric.com/en-gb/Products/mkpowerdistributionsystem/Documents/Interact%20UnderFloor%20Power.pdf

    Seemingly some of the "tap offs" can contain 13A fuses - so could in theory be used to supply (portable) appliances directly - making the fundamental differences between them an say a 13A plug seem even less clear (maybe the arrangement should be considered more like a FCU serving an appliance rather than a plug & socket).


     - Andy.
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