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Cable grouping factor - Space on ladder for no groupping

Apostolos
Good morning everyone.

If I may ask the more experienced members here...

I have a ladder with various submains departing from a Main Switchboard.

Is there any distance I could leave between a specific submain cable and the rest of the cables on the ladder (left and right) that allows me to get away from any grouping factor for this specific cable?

For example something like twice the external diameter of the cable left and right of the cable?

(Just an example)

Thanks
Parents
  • 0
    The problem was in a few words the following:

    DNO ACB in one corner of plant room

    Main switchboard in the other corner of plant room

    Ladder in between for parallel singles 150mm2 XLPE/LSF

    The problem is that people on site decided to use this ladder for the outgoing submains of the switch panel which means that my calculations for the incomer would be ruinned by a grouping factor that I initially had not predicted.

    Now I am trying to push the incoming tails on one side of the ladder and the outgoing circuits on the other side of the ladder spacing them so that one does not affect the other.

    If this does not succeed I will ask them to install a second ladder 30cm above this one for the outgoing circuits keeping this ladder only for the incoming tails

    Cheers

Reply
  • 0
    The problem was in a few words the following:

    DNO ACB in one corner of plant room

    Main switchboard in the other corner of plant room

    Ladder in between for parallel singles 150mm2 XLPE/LSF

    The problem is that people on site decided to use this ladder for the outgoing submains of the switch panel which means that my calculations for the incomer would be ruinned by a grouping factor that I initially had not predicted.

    Now I am trying to push the incoming tails on one side of the ladder and the outgoing circuits on the other side of the ladder spacing them so that one does not affect the other.

    If this does not succeed I will ask them to install a second ladder 30cm above this one for the outgoing circuits keeping this ladder only for the incoming tails

    Cheers

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