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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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    Bob C:

    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.




    And back to the original post, no, the tap-offs are not socket-outlets, but are an essential part of a busbar trunking system or its associated components (see the definition of busbar trunking system on page 25 of BS 7671:2018) - they are not designed to accept a standard plug (page 34), the difference being that the plug is intended for both electrical connection and mechanical retention of a flexible cable, whereas a tap-off unit need not directly supply a flexible cable.

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    Bob C:

    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.




    And back to the original post, no, the tap-offs are not socket-outlets, but are an essential part of a busbar trunking system or its associated components (see the definition of busbar trunking system on page 25 of BS 7671:2018) - they are not designed to accept a standard plug (page 34), the difference being that the plug is intended for both electrical connection and mechanical retention of a flexible cable, whereas a tap-off unit need not directly supply a flexible cable.

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