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Hard Copper Stranded Conductor

TJ hard copper stranded conductor has a sectional area range of 10-500mm2, and it is mainly used for overhead power line and power supply system of electric railway.

Technical Parameters
Nominal Cross Section (mm2) Single Wire Outer Diameter of Strand (mm) Calculated Tensile Strength (kN) Max. DC Resistance at 20℃ (Ω/km) Current Capacity (A) Calculated Weight (kg/km)
Number Diameter (mm)
10 7 1.35 4.1 4.02 1.87 90 90
16 7 1.70 5.1 6.37 1.20 125 143
25 7 2.12 6.36 9.72 0.7424 160 218
35 7 2.50 7.5 13.77 0.5238 200 310
50 7 3.00 9.0 19.84 0.3638 250 446
50 19 1.78 9.0 19.38 0.3781 250 437
70 19 2.12 10.7 26.38 0.2748 310 596
95 19 2.50 12.5 37.39 0.1939 380 845
120 19 2.85 14.2 46.90 0.1546 440 1060
127 19 2.92 14.6 51 0.1422 470 1163
150 37 2.25 15.8 58.98 0.1232 510 1337
185 37 2.52 17.7 72.81 0.09981 585 1649
240 37 2.85 19.95 79.13 0.07680 700 2140
300 61 2.52 22.68 95.92 0.06287 800 2615
400 61 2.85 25.65 123.59 0.04669 960 3536
500 61 3.23 29.1 200.38 0.03635 1110 4545

Note:
1. The weight is calculated according to average lay ratio and density of 8.9kg/dm3.
2. Recommended working condition: wind speed is 0.6m/s, ambient temperature is 35℃, frequency is 60Hz or lower, and the maximum temperature for conductor is 70℃. When it is specially laid in static air, the capacity will descend for about 30%.

Delivery Length
This stranded conductor can be delivered at any length according to the negotiation, and the length error for single wire is within ±5%. Meanwhile, short cable is also acceptable, but its length should not exceed 5% of the total length per time. Also, there are some requirements for every short cable as listed below.
1. The total length of short product should be longer than 150 meters if the nominal cross section is 70mm2 or lower.
2. For short cable whose nominal cross section is 95mm2 or higher, its total length should not be shorter than 250 meters.

Related Names
Electric Cable Copper Core Manufacturer | Transportation Power Supply | Electrical Wiring Material

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