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  • Service Wire Copper Stranded Conductor Bare or Tinned, Soft Annealed, Medium Hard, Hard Drawn Wire

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    Application: Suitable for use in electrical grounding systems (including counterpoise grounding) and on insulators for overhead transmission and distribution applications. Stranded conductors offer greater flexibility than solid. 

    Standards: 
    • ASTM Standards: 
    • B-1 (hard drawn) 
    • B-2 (medium hard drawn) 
    • B-3 (soft or annealed) 
    • B-8 (concentric lay stranded) 
    • B-33 (tinned) 
    • B-787 (combination strand) 
    • REA/RUS Approved 
    • Federal Standard QQ-W-343 
    • RoHS Compliant

    size
    awg
    strand
    (no.)
    stranding
    class
    nominal
    diameter
    overall
    (inch)
    approx.
    netweight
    (lb/1000')
    hard drawn medium hard drawn soft drawn ampacity* service wire
    part number
    min.
    breaking
    strength
    (lbs.)
    dc resistance
    (ohms/1000')
    @ 20°c
    min.
    breaking
    strength
    (lbs.)
    dc resistance
    (ohms/1000')
    @ 20°c
    dc resistance
    (ohms/1000')
    @ 20°c
    bare tinned
    16 26 k 0.058 7.97 124.7 4.2590 100.4 4.2370 4.0960 4.1100 - BST26S16
    14 7 b 0.073 12.70 197.1 2.6790 157.7 2.6650 2.5800 2.6800 - BST7S14
    12 7 b 0.092 20.20 311.1 1.6850 247.7 1.6760 1.6200 1.6900 - BST7S12
    10 7 b 0.115 32.00 491.7 1.0600 388.9 1.0540 1.0200 1.0600 - BST7S10
    8 7 b 0.143 50.90 777.0 0.6663 610.0 0.6629 0.6408 0.6654 98 BST7S8
    6 7 b 0.181 81.00 1,228.0 0.4191 959.0 0.4169 0.4030 0.4196 124 BST7S6
    4 7 a,b 0.230 128.90 1,938.0 0.2636 1,505.0 0.2622 0.2540 0.2637 155 BST7S4
    3 7 a,b 0.254 162.50 2,433.0 0.2090 1,885.0 0.2079 0.2010 0.2086 - BST7S3
    2 7 aa 0.320 202.90 2,912.0 0.1641 2,298.0 0.1633 0.1578 - 209 BST3S2
    2 7 a,b 0.284 204.90 3,050.0 0.1660 2,360.0 0.1650 0.1594 0.1657 209 BST7S2
    1 7 a,aa 0.328 258.40 3,801.0 0.1316 2,955.0 0.1309 0.1265 0.1302 - BST7S1
    1 19 b** 0.316 258.40 3,902.0 0.1316 3,039.0 0.1309 0.1265 0.1313 - BST19S1
    1/0 7 a,aa 0.368 325.80 4,752.0 0.1042 3,705.0 0.1037 0.1002 0.1031 282 BST7S1/0
    1/0 19 b** 0.357 325.80 4,897.0 0.1042 3,802.0 0.1037 0.1003 0.1043 282 BST19S1/0
    2/0 7 a,aa 0.414 410.90 5,927.0 0.0826 4,640.0 0.0822 0.0795 0.0818 329 BST7S2/0
    2/0 19 b** 0.402 410.90 6,153.0 0.0826 4,765.0 0.0822 0.0795 0.0826 329 BST19S2/0
    3/0 7 a,aa 0.464 518.10 7,36.0 0.0655 5,812.0 0.0652 0.0631 0.0649 382 BST7S3/0
    3/0 19 b** 0.450 518.10 7,702.0 0.0655 5,973.0 0.0652 0.0631 0.0655 382 BST19S3/0
    4/0 7 a,aa 0.522 653.30 9,154.0 0.0519 7,278.0 0.0517 0.0499 - 444 BST7S4/0
    4/0 19 b** 0.509 653.30 9,617.0 0.0519 7,479.0 0.0517 0.0500 0.0515 444 BST19S4/0
    4/0 61 d 0.530 653.30 9,903.0 0.0519 7,728.0 0.0517 0.0500 0.0520 444 BST61S4/0
    250 19 a 0.574 771.9 11,360 0.0440 8,836 0.0438 0.0423 0.0435 494 BST19S250
    250 37 b 0.572 771.9 11,600 0.0440 8,952 0.0438 0.0423 0.0440 494 BST37S250
    300 19 a 0.629 926.3 13,510 0.0366 10,530 0.0365 0.0352 0.0363 556 BST19S300
    300 37 b 0.629 926.3 13,855 0.0366 10,732 0.0365 0.0353 0.0367 556 BST37S300
    350 19 a 0.678 1,081.0 15,590 0.0314 12,200 0.0313 0.0302 0.0311 - BST19S350
    350 37 b 0.676 1,081.0 16,070 0.0314 12,462 0.0313 0.0302 0.0314 - BST37S350
    400 19 a,aa 0.726 1,235.0 17,810 0.0275 13,950 0.0273 0.0264 0.0272 - BST19S400
    400 37 b 0.721 1,235.0 18,331 0.0275 14,144 0.0273 0.0264 0.0272 - BST37S400
    500 19 aa 0.811 1,544.0 21,942 0.0220 17,313 0.0219 0.0212 0.0218 773 BST19S500
    500 37 a,b 0.796 1,544.0 22,495 0.0220 17,517 0.0219 0.0212 0.0218 773 BST37S500
    600 61 b 0.887 1,853.0 27,530 0.0183 21,350 0.0182 0.0176 0.0181 - BST61S600
    750 37 aa 0.997 2,316.0 33,411 0.0146 26,162 0.0146 0.0141 0.0145 1,000 BST37S750
    750 61 a,b 0.985 2,316.0 34,090 0.0146 26,510 0.0146 0.0141 0.0145 1,000 BST61S750
    1000 37 aa 1.152 3,088.0 43,826 0.0110 34,396 0.0109 0.0106 0.0109 1,193 BST37S1000
    1000 61 a,b 1.152 3,088.0 45,030 0.0110 35,100 0.0109 0.0106 0.0109 1,193 BST61S1000

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