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

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.

Parents
  • I think you're missing the point here. It's the whole building that has to contain only LS0H cables within it. If you're choking to death on toxic fumes, it doesn't make any difference whether they came from distribution cables or control panel wiring.

    regards, burn

  • Agree with that - the 'big picture' approach  is often lacking. Such silliness is  often seen in the form of LS0H wires/ cables, but inside a  PVC conduit or even PVC duct / dado rail.

    The volume of the plastic in  the enclosure is many times that of the insulation on the wire and  just waiting there to emit more volume of choking fumes than the cable would ever have done.

    Mike.

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  • Agree with that - the 'big picture' approach  is often lacking. Such silliness is  often seen in the form of LS0H wires/ cables, but inside a  PVC conduit or even PVC duct / dado rail.

    The volume of the plastic in  the enclosure is many times that of the insulation on the wire and  just waiting there to emit more volume of choking fumes than the cable would ever have done.

    Mike.

Children
  • Hi Mike, 

    Yes PVC ducts and dado trunkings are being used within the same building and also there is plenty of material that will result in toxic fumes. That had been my discussion with the consultant that it is not a fire engineered installation overall and the specifications are a little unclear for the wiring within panels.