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Cables Underground.

richard64

There is a correction factor Cc of 0.9 for cables buried, or in ducts underground.

However, in the current carrying capacity tables, there is a column for Ref Method D; direct in ground or in ductings.

Would you still apply the Cc to these figures, and if so, why aren't they adjusted in the tables?

Parents
  • 0

    Are you thinking of 433.1.203, which downrates the OCPD (and thus, of course, the circuit) by a factor of 0.9?

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  • 0

    Are you thinking of 433.1.203, which downrates the OCPD (and thus, of course, the circuit) by a factor of 0.9?

Children
  • 0 in reply to Chris Pearson

    Hi Chris. I was looking at Appendix 4, 5.1.1, which is the same in principle as 433.1.203. 

    But in the tables, there is also a rating for cables underground. 

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