This question concerns the cable sizes and loadings that can be accepted by cable basket. It has been answered by Cablofil (Theme - Distribution Equipment including Cable Management):

Question: Is there a guide available that has information on the size, type and weight of cables that can be installed on a cable basket?
Answer: Each manufacturer should make available this information. Usually it's a graph identifying the weight/metre the cable basket can safety accept for a variety of spans.
Full technical guide can be made available (pdf of paper copy). Email [email protected] to obtain a full copy.
In the meantime please have a look at this webpage: http://www.cablofil.co.uk/technical-guide/mechanical-resistance and this: http://www.cablofil.co.uk/technical-guide
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