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Bare Conductor

GSW-Galvanized Steel Wire/Strand

GSW-Galvanized Steel Wire/Strand

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Bare concentric-lay-stranded conductors are made from bare, hard-drawn, round, aluminum clad steel wires for general use of electrical purposes. Tensile strength and zinc-clad of steel wire have different grades.
GSW-Galvanized Steel Wire/Strand

Descriptions

Bare concentric-lay-stranded conductors are made from bare, hard-drawn, round, aluminum clad steel wires for general use of electrical purposes. Tensile strength and zinc-clad of steel wire have different grades.

Applications

The galvanized single steel wires or stranded steel wires are suitable for cores of ACSR to improve its tensile strength. And they can also be used in the aerial transmission line as the line material of ground connection to avoid the lightning strike.

Standards

● IEC 61089 Round Wire Concentric Lay Overhead Electrical Stranded Conductors
● ASTM A 475 Zinc-Coated Steel Wire Strand
● BS 183 General Purpose Galvanized Steel Wire Strand
● AS 1222.1 Steel Conductors and Stays—Bare overhead Part 1: Galvanized (SC/GZ)

● GB/T 1179 Round Wire Concentric Lay Overhead Electrical Stranded Conductors

Technical Parameters of ASTM A 475-GSW

Nominal diameter of strand Number of Wires in Strand Nominal Diameter of Coated Wire in Strand Approx.
weight of strand 		Minimun Breaking Strength of Strand
Utilities Grade Common Grade Siemens-
Martin Grade 		High-
Strength Grade 		Extra-high Strength Grade
In. mm mm kg/km kN kN kN kN kN
1/8 3.18 7 1.04 48 - 2.402 4.048 5.916 8.140
5/32 3.97 7 1.32 76 - 3.870 6.539 9.519 13.078
3/16 4.76 7 1.57 109 - 5.115 8.452 12.677 17.748
3/16 4.76 7 1.65 119 10.676 - - - -
7/32 5.56 3 2.64 131 - 6.228 10.409 15.569 21.796
7/32 5.56 7 1.83 146 - 6.850 11.387 17.126 24.020
1/4 6.35 3 3.05 174 14.012 8.274 13.523 21.040 29.981
1/4 6.35 3 3.05 174 20.017 - - - -
1/4 6.35 7 2.03 180 - 8.452 14.012 21.129 29.581
9/32 7.14 3 3.30 204 - 9.252 15.035 23.398 33.362
9/32 7.14 7 2.36 244 20.462 11.432 18.905 28.469 39.812
5/16 7.94 3 3.68 255 28.913 11.076 18.193 28.246 40.479
5/16 7.94 7 2.64 305 - 14.234 23.798 35.586 49.820
5/16 7.94 7 2.77 335 26.689 - - - -
3/8 9.52 3 4.19 328 37.810 14.813 24.732 37.187 52.489
3/8 9.52 7 3.05 407 51.155 18.905 30.915 48.040 68.503
7/16 11.11 7 3.68 595 80.068 25.355 41.591 64.499 92.523
1/2 12.70 7 4.19 770 111.206 32.917 53.823 83.627 119.657
1/2 12.70 19 2.54 751 - 33.895 56.492 84.961 118.768
9/16 14.29 7 4.78 1000 - 42.703 69.837 108.981 155.688
9/16 14.29 19 2.87 949 - 42.881 71.616 107.202 149.905
5/8 15.88 7 5.26 1211 - 51.599 84.961 131.667 188.605
5/8 15.88 19 3.18 1186 - 48.930 80.513 124.995 178.819
3/4 19.05 19 3.81 1721 - 71.172 116.543 181.487 259.331
7/8 22.22 19 4.50 2356 - 97.416 159.691 248.211 354.523
1 25.40 19 5.08 3089 - 127.664 209.066 325.610 464.839
1 25.40 37 3.63 3065 - 125.885 205.508 319.827 456.832
1 1/8 28.58 37 4.09 4010 - 160.136 262.000 407.457 581.827
1 1/4 31.75 37 4.55 4840 - 198.391 324.720 505.318 721.502
Note: Class A and Class B and Class C are in same structure.

Technical Parameters of BS 183-GSW (1)

Construction Number of wires/wire diameter Approximate strand diameter Minimum breaking load of strand Approx.
mass
Grade 350 Grade 480 Grade 700 Grade 850 Grade           1000 Grade           1150 Grade 1300
mm kN kN kN kN kN kN kN kg/1000 m
3/1.80 3.9 2.65 3.66 — — — — — 60
3/2.65 5.7 5.80 7.95 — — — — — 130
3/3.25 7.0 8.70 11.95 — — — — — 195
3/4.00 8.6 13.20 18.10 — — — — — 295
4/1.80 4.4 3.55 4.90 — — — — — 80
4/2.65 6.4 7.70 10.60 — — — — — 172
4/3.25 7.9 11.60 15.90 — — — — — 260
4/4.00 9.7 17.60 24.10 35.20 — — — — 390
5/1.50 4.1 3.10 4.24 6.18 — — — — 69
5/1.80 4.9 4.45 6.10 8.90 — — — — 95
5/2.65 7.2 9.65 13.25 19.30 — — — — 220
5/3.25 8.8 14.50 19.90 29.00 — — — — 320
5/4.00 10.8 22.00 30.15 43.95 — — — — 490
7/0.56 1.7 0.60 0.83 1.20 — 1.70 1.98 2.24 14
7/0.71 2.1 0.97 1.33 1.94 — 2.75 3.19 3.60 28
7/0.85 2.6 1.39 1.90 2.80 — 3.95 4.57 5.15 31
7/0.90 2.7 1.55 2.14 3.10 — 4.45 5.12 5.80 35
7/1.00 3.0 1.92 2.64 3.85 — 5.50 6.32 7.15 43
7/1.25 3.8 3.01 4.10 6.00 — 8.55 9.88 11.15 67
7/1.40 4.2 3.75 5.17 7.54 9.16 10.75 12.35 14.00 84
7/RSa 4.3 3.85 5.28 7.70 9.35 11.00 12.65 14.30 86
7/1.60 4.8 4.90 6.75 9.85 11.95 14.10 16.20 18.30 110
7/1.80 5.4 6.23 8.55 12.45 — 17.80 20.50 23.20 140
7/2.00 6.0 7.70 10.55 15.40 — 22.00 25.30 28.60 170
7/2.36 7.1 10.70 14.70 21.40 — 30.60 35.20 39.80 240
7/2.65 8.0 13.50 18.50 27.00 — 38.60 44.40 50.20 300
7/3.00 9.0 17.30 23.75 34.65 — 49.50 56.90 64.30 392
7/3.15 9.5 19.10 26.20 38.20 — 54.55 62.75 70.90 430
7/3.25 9.8 20.30 27.85 40.65 — 58.05 66.80 75.50 460
7/3.65 11.0 25.60 35.15 51.25 — 73.25 84.20 95.20 570
7/4.00 12.0 30.90 42.20 61.60 — 88.00 101.0 114.0 690
7/4.25 12.8 34.75 47.65 69.50 — 99.30 114.0 129.0 780
7/4.75 14.0 43.40 59.45 86.80 — 124.0 142.7 161.3 970
19/1.00 5.0 5.22 7.16 10.45 — 14.92 17.16 19.40 120

BS 183-GSW (2)

Construction Number of wires/wire diameter Approximate strand diameter Minimum breaking load of strand Approx.
mass
Grade 350 Grade 480 Grade 700 Grade 850 Grade           1000 Grade           1150 Grade 1300
  mm kN kN kN kN kN kN kN kg/1000 m
19/1.25 6.3 8.16 11.19 16.32 — 23.32 26.81 30.31 180
19/1.40 7.0 10.24 14.04 20.47 — 29.25 33.64 38.02 230
19/1.60 8.0 13.37 18.34 26.75 — 38.20 43.93 49.66 300
19/2.00 10.0 20.90 28.65 41.78 50.74 59.69 68.64 77.60 470
19/2.50 12.5 32.65 44.80 65.29 79.28 93.27 107.3 121.3 730
19/3.00 15.0 47.00 64.50 94.00 114.1 134.3 154.5 174.6 1050
19/3.55 17.8 65.80 90.27 131.6 159.9 188.0 216.3 244.5 1470
19/4.00 20.0 83.55 114.6 167.1 203.0 238.7 274.6 310.4 1870
19/4.75 23.8 117.85 161.6 235.7 286.0 336.7 387.2 437.7 2630

The construction of this strand consists of six wires of 1.40mm diameter on a centre wire of 1.50mm diameter. 

The diameter of the centre wire shall not be less than 0.08mm nor more than 0.12mm greater than the diameter of the outer wire.

Technical Parameters of AS 1222.1-GSW (SC/GZ)

Standing and wire diameter Approx. overall diameter Cross-section area Approx. mass per km Calculated breaking load (CBL) Equivalent aluminium area Typical d.c. resistance per km at 20°C
mm mm mm² kg kN mm² Ω
3/2.00 4.31 9.426 74 11.7 1.4 20
3/2.75 5.93 17.82 140 22.2 2.6 11
7/2.00 6.00 21.99 173 26.0 3.2 8.7
7/2.75 8.25 41.58 328 49.0 6.1 4.6
7/3.25 9.75 58.07 458 68.7 8.6 3.3
7/3.75 11.3 77.28 609 91.3 11 2.5
19/2.00 10.0 59.70 473 70.5 8.8 3.2
19/2.75 13.8 112.9 894 133 17 1.7
19/3.25 16.3 157.6 1250 186 23 1.2

Technical Parameters of GB/T 1179-GSW

Code
Number 		Area
mm² 		Number of
wires 		Diameter
mm 		Linear Mass
kg/km 		Rated strength
kN 		DC resistance
Ω/km
Wire Cond. JG1A JG2A JG3A JG4A JG5A
10 10.8 7 1.40 4.20 84.8 14.44 15.62 17.46 20.15 21.12 17.9754
15 17.8 7 1.80 5.40 140.1 23.87 25.83 28.86 33.31 34.91 10.8740
20 22.0 7 2.00 6.00 173.0 29.47 31.89 35.63 41.12 43.10 8.8079
25 26.6 7 2.20 6.60 209.3 35.66 38.58 43.11 49.76 52.15 7.2793
35 37.2 7 2.60 7.80 292.4 48.69 52.40 59.09 67.64 70.99 5.2118
40 38.2 19 1.60 8.00 301.9 51.19 55.39 61.89 71.44 74.88 5.0939
50 49.5 7 3.00 9.00 389.2 64.82 69.77 78.67 90.05 94.51 3.9146
50 48.3 19 1.80 9.00 382.1 64.79 70.11 78.33 90.41 94.76 4.0248
55 56.3 7 3.20 9.60 442.9 72.62 79.38 87.26 99.65 105.3 3.4406
60 59.7 19 2.00 10.0 471.7 79.98 86.55 96.70 111.6 117.0 3.2601
65 67.3 7 3.50 10.5 529.8 86.88 94.96 104.4 119.2 125.9 2.8761
70 72.2 19 2.20 11.0 570.8 96.78 104.73 117.00 135.1 141.6 2.6943
75 74.4 37 1.60 11.2 589.4 99.7 107.9 120.5 139.1 145.8 2.6225
80 79.4 7 3.80 11.4 624.5 102.4 109.6 120.7 136.5 144.5 2.4399
80 78.9 19 2.30 11.5 623.9 103.4 111.3 125.5 143.7 150.8 2.4651
90 88.0 7 4.00 12.0 692.0 113.5 121.4 133.7 151.3 160.1 2.2020
95 94.8 19 2.52 12.6 748.9 124.14 133.62 150.68 172.5 181.0 2.0535
100 101 19 2.60 13.0 797.2 132.1 142.2 160.4 183.6 192.7 1.9291
115 116 37 2.00 14.0 921.0 155.8 168.5 188.3 217.4 227.8 1.6784
125 125 19 2.90 14.5 991.8 164.4 177.0 199.5 228.4 239.7 1.5506
150 153 19 3.20 16.0 1207.6 197.1 215.5 236.9 270.5 285.7 1.2735
155 154 37 2.30 16.1 1218.0 201.4 216.8 244.4 279.8 293.6 1.2691
185 183 19 3.50 17.5 1444.7 235.8 257.8 283.3 323.6 341.8 1.0645
200 196 37 2.60 18.2 1556.5 257.3 277.0 312.3 357.5 375.2 0.9931
240 239 19 4.00 20.0 1886.9 308.0 329.5 362.9 410.7 434.5 0.8150
245 244 37 2.90 20.3 1936.4 320.2 344.6 388.6 444.8 466.8 0.7983
300 298 37 3.20 22.4 2357.7 383.9 419.6 461.2 526.7 556.5 0.6556
355 356 37 3.50 24.5 2820.5 459.2 501.9 551.8 630.1 665.7 0.5480
465 465 37 4.00 28.0 3683.9 599.8 641.6 706.7 799.7 846.2 0.4196

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GSW-Galvanized Steel Wire/Strand

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