Current derating factor 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0 Number of wires in bundle Bundle loading percent 20 40 60 80 100 Current derating factor 0 10 20 30 40 50 60 70 80 90 100 1.00 0.95 0.90 0.85 0.80 0.75 0.70 Altitude (x1,000 feet) Figure 9-118.  Bundle derating curve. Figure 9-119.  Altitude derating curve. 9-74