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CABLES AND WIRES - Novkabel

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Table: Correction factor depending on the ambient temperatureLayingAmbient temperature ( O C)-5 0 5 10 15 20 25 30 35 40 45 50 55 60In air 1,24 1,21 1,18 1,15 1,12 1,08 1,04 1,00 0,96 0,91 0,87 0,82 0,76 0,71In ground 1,11 1,09 1,08 1,07 1,04 1,00 0,96 0,93 0,89 0,85 0,80 0,76 - -Table: Correction factor depending on the depth of layingSingle-core cablesDepth of laying (cm)Nominal cross-section of conductor (mm 2 )≤ 185 > 185Three-core cables50 1,04 1,06 1,0460 1,02 1,04 1,0380 1,00 1,00 1,00100 0,98 0,97 0,98125 0,96 0,95 0,96150 0,95 0,93 0,95175 0,94 0,91 0,94200 0,93 0,90 0,93250 0,91 0,88 0,91300 0,90 0,86 0,90Table: Correction factor depending on the specific thermal resistance of theground- for single-core cables228Nominalcrosssectionofconductor(mm 2 )Specific thermal ground resistance (Km/W)0,7 0,8 0,9 1 1,5 2 2,5 316 1,29 1,24 1,19 1,15 1,00 0,89 0,82 0,7525 1,30 1,25 1,20 1,16 1,00 0,89 0,81 0,7535 1,30 1,25 1,21 1,16 1,00 0,89 0,81 0,7550 1,32 1,26 1,21 1,16 1,00 0,89 0,81 0,7470 1,33 1,27 1,22 1,17 1,00 0,89 0,81 0,7495 1,34 1,28 1,22 1,18 1,00 0,89 0,80 0,74120 1,34 1,28 1,22 1,18 1,00 0,88 0,80 0,74150 1,35 1,28 1,23 1,18 1,00 0,88 0,80 0,74185 1,35 1,29 1,23 1,18 1,00 0,88 0,80 0,74240 1,36 1,29 1,23 1,18 1,00 0,88 0,80 0,73300 1,36 1,30 1,24 1,19 1,00 0,88 0,80 0,73400 1,37 1,30 1,24 1,19 1,00 0,88 0,79 0,73

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