STRANDED CONDUCTORBare or TinnedSoft (Annealed), Medium Hard, Hard Drawn250 Kcmil–750 Kcmil

Part

Number

Size

^(Kcmil)

Strand

^(no.)

Stranding

Class

Nominal

Diameter

^(in.)

Approx.

Net Weight

^(lb./1000')

HARD

DRAWN

_{Min. Breaking Strength}

^(lbs.)

HARD

DRAWN

_{DC Resistance}

^{(OHMS/1000')
@20°C}

MED HARD

DRAWN

_{Min. Breaking Strength}

^(lbs.)

MED HARD

DRAWN

_{DC Resistance}

^{(OHMS/1000')
@20°C}

SOFT

^(BARE)

_{DC Resistance}

^{(OHMS/1000')
@20°C}

SOFT

^(TINNED)

_{DC Resistance}

^{(OHMS/1000')
@20°C}

Ampacity*

BST19S250

250

19

A

0.574

   771.90

11,360

0.0440

  8,836

0.0438

0.0423

0.0435

  494

BST37S250

250

37

B

0.572

   771.90

11,600

0.0440

  8,952

0.0438

0.0423

0.0440

  494

BST19S300

300

19

A

0.629

   926.30

13,510

0.0366

10,530

0.0365

0.0352

0.0363

  556

BST37S300

300

37

B

0.629

   926.30

13,855

0.0366

10,732

0.0365

0.0353

0.0367

  556

BST19S350

350

19

A

0.678

1,081.00

15,590

0.0314

12,200

0.0313

0.0302

0.0311

-

BST37S350

350

37

B

0.676

1,081.00

16,070

0.0314

12,462

0.0313

0.0302

0.0314

-

BST19S400

400

19

A,AA

0.726

1,235.00

17,810

0.0275

13,950

0.0273

0.0264

0.0272

-

BST37S400

400

37

B

0.721

1,235.00

18,331

0.0275

14,144

0.0273

0.0264

0.0272

-

BST19S500

500

19

AA

0.811

1,544.00

21,942

0.0220

17,313

0.0219

0.0212

0.0218

  773

BST37S500

500

37

A,B

0.796

1,544.00

22,495

0.0220

17,517

0.0219

0.0212

0.0218

  773

BST61S600

600

61

B

0.887

1,853.00

27,530

0.0183

21,350

0.0182

0.0176

0.0181

-

BST37S750

750

37

AA

0.997

2,316.00

33,411

0.0146

26,162

0.0146

0.0141

0.0145

1,000

BST61S750

750

61

A,B

0.985

2,316.00

34,090

0.0146

26,510

0.0146

0.0141

0.0145

1,000

*Per NEC Table 310.15 (B)(21). Based on conductor temperature of 80°C; ambient temperature of 40°C; 2 ft./sec. wind. NOTE: The data shown is approximate and subject to standard industry tolerances.