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    Tabulated Current - Trainee - Am I applying derating factors twice?

    Hi, Thanks for your patience with me - I am a trainee. So I have got a 2.5 ring in a 20mm PVC conduit. 2 multicore cables enclosed means that according to table 4C1 on page 443 I have to apply Cg of 0.8 to the tabulated current. So I know that must be > or at least = to In/Cg - (Appendix 4...

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