My first post :) . How to determine cable derating factor? We can determine it from cable datasheet. Usually, we will go for the worse case scenario which is K= 0.7. For 0.7, we assume in a cable tray, we will have more than 10 cables in it.
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| Cable in cable tray, the black cable is the newly installed cable and the white one are the existing cables which already coated |
