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Do the internal power cables within a panel need to be LS0H

JEH

Upon clients request we have some service panel specially manufactured. It is like a normal power panel but has some special socket outlets (industrial and general purpose type) installed on its front face/plate. 

Within this service panel, there is a main panel for incoming supply which is further distributed to the socket outlets through their own branch breakers. In order to have flexibility, the panel manufacturer employed fire resistant cables (instead of flexible busbars) between the branch breakers and the socket outlets. 

The consultant on the project is rejecting the material saying that those internal cables should be low smoke zero halogen because the specs for the project calls for all internal cabling and wiring of the building to be LS0H. 

I will appreciate your thoughts on this, is the consultant right to reject the material? For my own opinion those cables are just like busbars and they do not need to be LS0H necessarily.

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  • 0

    3. Switch gear cables

    Cables used for internal wiring of switch and control gear shall consist of a plain annealed copper conductor, LS0H insulatd in accordance with the requirements of BS 6231

    That looks to cover this case to me - a box containing circuit breakers to feed sockets sounds like 'switchgear' to me.

       - Andy.

Reply
  • 0

    3. Switch gear cables

    Cables used for internal wiring of switch and control gear shall consist of a plain annealed copper conductor, LS0H insulatd in accordance with the requirements of BS 6231

    That looks to cover this case to me - a box containing circuit breakers to feed sockets sounds like 'switchgear' to me.

       - Andy.

Children
  • 0 in reply to AJJewsbury

    Hi Andy, 

    I principally agree with you that it is definitely the closest one but to me switchgear is the equipment that controls or is used to switch the power supply. I would rather refer the case under discussion as a distribution panel and not a switch/control gear.

  • 0 in reply to JEH
    JEH said:
    but to me switchgear is the equipment that controls or is used to switch the power supply

    That may be the case, but a 'switchgear and controlgear assembly' is something else again.

    So, if the specification just asks for LS0H in switchgear (in those words), then that's not the same as switchboards/distribution boards (the switchgear is what's inside the assembly) ... so yes, the QS ought to have a look at this and help work things out.

    This is a case where standards for the products and assemblies may help to define what is what.

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