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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

    You cannot arbitrarily set aside a specification from a consultant. If the internal wiring of the panel is not LS0H, then the panel can be legitimately rejected. 
    The specification may be have been embedded in an over all, fire-engineered solution for the building.

  • 0 in reply to lyledunn
    lyledunn said:
    You cannot arbitrarily set aside a specification from a consultant. If the internal wiring of the panel is not LS0H, then the panel can be legitimately rejected. 

    Agreed.

    JEH said:
    the specs for the project calls for all internal cabling and wiring of the building to be LS0H. 

    Did the project specifications go down to wiring within assemblies? Or assemblies specifically produced for the project (i.e. not commercial-off-the-shelf?

    Perhaps worth a good look at the specifications again - possibly with a quantity surveyor or external consultant - to check?

  • 0 in reply to gkenyon

    There are total three separate headings/instances where specifications mention about LS0H cables:

    1. Power Supply cables:

    Power supply cables shall generally consist of copper conductor, XLPE insulation and LS0H extruded bedding and oversheath....

    2. LS0H insulated with/without Sheath

    General wiring cables for use in wiring systems and in conduit or trunking enclosures shall be in accordnace with BS6724 electrical cables.

    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

    Thank you, I guess i will sit down with the QS team on this to provide their input.

  • 0 in reply to lyledunn

    Thank you for the response and yes I totally agree with what you said. Trust me, the intention is not to set aside anything. Its just that specs are not written explicitly for this situation. At the end, if the consultants does agree with any of the counter logic, we will be replacing all the cabling.

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  • 0 in reply to lyledunn

    Thank you for the response and yes I totally agree with what you said. Trust me, the intention is not to set aside anything. Its just that specs are not written explicitly for this situation. At the end, if the consultants does agree with any of the counter logic, we will be replacing all the cabling.

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