Technical parameters of MICC cable

Sales Technical parameters of MICC cable

Mineral insulated copper cable(MICC) is combined annealed copper as conductor, Mgo powder as insulation, and annealed copper tube as sheath, it is widely applicated in the power industry.
  • DIA : From 1 to 19 cores
  • SHEATH MATERIALS : Copper/plastic sheath
  • TYPE : BTTQ/BTTVQ/WD-BTTYQ/BTTZ/BTTVZ/WD-BTTYZ

Product Detail  

1.Cable technical parameters

(1). Rated voltage of mineral insulated cables:light load (BTTQ,BTTVQ, WD-BTTYQ) 500V and heavy load (BTTZ,BTTVZ,WD-BTTYZ)750V;

(2). Test voltage for mineral insulated cable: light load 2000V/1min, heavy load 2500V/1min;

(3). The insulation resistance of MICC cable should be above 1000MΩ. When the cable length is below 100m, the insulation resistance should be above10000MΩ;

(4). Long-term working temperature of mineral insulated copper cable: the long-term working temperature of MICC is 70°C, and the long-term working temperature is 105°C without human interference, and in special high temperature occasions, the long-term working temperature can be 250°C and below. At 950-1000°C can continue to power supply for more than 3h, short or severely short working temperature can reach 1083°C;

(5). Bending radius: The minimum allowable bending radius of mineral insulated cables meets the requirements of the following table.


External Diameter of the cable(mm)

D<7

7D<12

12D<15

D15

Minimum Curve Radius

2D

3D

4D

6D

Mineral insulated copper cable datasheet

Model

Number of Cores
*Standard Cross Section Size

Outer diameter

Rated Current
Capacity

Cross Section Size
 of Copper Sheath

Maximum
Length

Gross Weight

BTTQ
(BTTVQ)
(WD-BTTYQ)

Copper sheath

Plastic
sheath

Copper sheath

Plastic
sheath

Copper sheath

Plastic
Sheath

mm²

mm

mm

A

A

mm²

m

Kg/Km

Kg/Km

2*1.0

5.1

6.4

17.5

19.5

6

800

104

125

2*1.5

5.7

7

22.5

25

7.1

800

130

153

2*2.5

6.6

7.9

30

33

9.4

600

179

205

2*4

7.7

9.2

40

44

12.1

450

248

287

3*1.0

5.8

7.1

15

16.5

7.6

800

135

159

3*1.5

6.4

7.7

19

21

8.9

650

168

193

3*2.5

7.3

8.8

25

28

10.7

500

224

261

4*1.0

6.3

7.6

14.5

16

8.8

700

161

187

4*1.5

7

8.3

19

21

10.2

550

202

230

4*2.5

8.1

9.6

25

28

12.8

400

278

319

7*1.0

7.6

9.1

10

11

11.6

650

233

271

7*1.5

8.4

9.9

12.5

14

13.3

530

291

333

7*2.5

9.7

11.2

17

19

17.4

400

407

455

BTTZ
(BTTVZ)
(WD-BTTYZ)

1*1.5

4.9

6.2

30

33

5.8

1000

97

117

1*2.5

5.3

6.6

39

43

6.4

1000

116

137

1*4

5.9

7.2

51

56

7.7

1000

146

170

1*6

6.4

7.7

63

69

8.9

900

180

206

1*10

7.3

8.8

81

90

10.7

700

241

278

1*16

8.3

9.8

107

119

13.2

560

329

371

1*25

9.6

11.1

139

154

17

425

455

502

1*35

10.7

12.2

168

187

20.2

340

584

637

1*50

12.1

13.6

207

230

24.7

250

773

831

1*70

13.7

15.2

251

279

30.9

220

1022

1088

1*95

15.4

17.4

300

333

36.7

220

1315

1403

1*120

16.8

18.8

344

382

42.6

190

1604

1701

1*150

18.4

20.4

388

431

49.5

155

1950

2054

1*185

20.4

22.9

434

482

58.1

125

2360

2496

1*240

23.3

25.8

483

537

70.1

99

2993

3147

1*300

26

28.6

795

883

86.7

80

3680

3852

1*400

30

32.8

948

1053

110.8

60

4805

5007

2*1.5

7.9

9.4

23.5

26

12.5

560

230

270

2*2.5

8.7

10.2

32

36

14.6

480

284

327

2*4

9.8

11.3

42

47

17.6

360

365

413

2*6

10.9

12.4

54

60

20.9

300

459

512

2*10

12.7

14.2

74

82

26.7

230

634

695

2*16

14.7

16.2

98

109

34.1

170

871

941

2*25

17.1

19.1

128

142

43.4

130

1201

1299

3*1.5

8.3

9.8

20

22

13.6

550

260

302

3*2.5

9.3

10.8

27

30

16.1

440

332

378

3*4

10.4

11.9

36

40

19.3

350

426

477

3*6

11.5

13

46

51

23.1

270

537

593

3*10

13.6

15.1

62

69

30.3

200

768

833

3*16

15.6

17.6

83

92

38.1

150

1050

1140

3*25

18.2

20.2

108

120

47.4

100

1460

1564

4*1.5

9.1

10.6

20.5

23

15.8

450

312

358

4*2.5

10.1

11.6

27

30

18.5

360

395

444

4*4

11.4

12.9

36

40

22.9

300

519

574

4*6

12.7

14.2

46

51

26.7

220

658

719

4*10

14.8

16.3

61

68

34.4

170

927

997

4*16

17.3

19.3

80

89

45.8

148

1353

1455

4*25

20.1

22.6

104

116

56

124

1822

1956

7*1.5

10.8

12.3

14

15.5

20.7

260

444

496

7*2.5

12.1

13.6

19

21

24.7

240

562

620

10*1.5

13.5

15

12.5

13.5

26

180

638

703

10*2.5

15.2

17.2

17

19

29.7

150

836

924

12*1.5

14.1

15.6

11.5

13

32.2

160

706

774

12*2.5

15.6

17.6

15.5

17

38.1

150

907

997

19*1.5

16.6

18.6

10

11

41.6

120

982

1077



Note:(1). Metal sheath temperature :70℃, ambient temperature: 30℃

Standard cross section

of conductors mm2

Current carrying capacity A

Two loading conductors,

two-core or single-core cables

Three loading conductors

Multi-core or single-core cables lined up in triangular shape

Single-core cables lined up in a flat array

500V

1.5

23

19

21

2.5

31

26

29

4

40

35

38

750V

1.5

25

21

23

2.5

34

28

31

4

45

37

41

6

57

48

52

10

77

65

70

16

102

86

92

25

133

112

120

35

163

137

147

50

202

169

181

70

247

207

221

95

296

249

264

120

340

286

303

150

388

327

346

185

400

371

392

240

514

434

457

300

782

748

879

400

940

893

1032



Note: (1). The two ends of the copper sheath of the single-core cable in the circuit are connected to each other.

    (2). For the bare sheathed cable that is allowed to contact, its ampacity value should be multiplied by 0.9 according to this table.

(3). MICC plastic outer sheaths or bare cables that allow contact are laid in the air.

(4).Metal sheath temperature 105℃, ambient temperature: 30℃

Standard cross section of conductors mm2

Current carrying capacity A

Two loading conductors,two-core or single-core cables

Three loading conductors

Multi-core or single-core cables lined up in triangular shape

 

Single-core cables lined up in a flat array

500V

1.5

28

24

24

2.5

38

33

36

4

51

44

47

750V

1.5

31

26

30

2.5

42

35

41

4

55

47

53

6

70

59

67

10

96

81

91

16

127

107

119

25

166

140

154

35

203

171

187

50

251

212

230

70

307

260

280

95

369

312

334

120

369

359

383

150

485

410

435

185

550

465

492

240

643

544

572

300

973

947

964

400

1230

1136

1146


Note: (1). The two ends of the copper sheath of the single-core cable in the circuit are connected to each other.

         (2). When laying in bundles, the ampacity value of the cable does not need to be corrected.

  (3). Mineral-insulated cables, with plastic outer sheath or bare cables that allow contact to be laid in the air.

 (4).Metal sheath temperature 70℃, ambient temperature: 30℃


Standard cross section of conductors mm2

Current carrying capacity A

Two loading conductors,two-core or single-core cables

Three loading conductors

Multi-core or single-core cables  lined up in triangular shape

Connected single-core cables

intervals are created when single-core cables are vertically installed

intervals are created when single-core cables are horizontally installed

 500V

1.5

25

21

23

26

29

2.5

33

28

31

34

39

4

44

37

41

45

51

750V

1.5

26

22

26

28

32

2.5

36

30

34

37

43

4

47

40

45

49

56

6

60

51

57

62

71

10

82

69

77

84

95

16

109

92

102

110

125

25

142

120

132

142

162

35

174

147

161

173

197

50

215

182

198

213

242

70

264

223

241

259

294

95

317

267

289

309

351

120

364

308

331

353

402

150

416

352

377

400

454

185

472

399

426

446

507

240

552

466

496

497

565

300

812

758

789

792

889

400

965

913

933

938

1058


Note: (1). The two ends of the copper sheath of the single-core cable in the circuit are connected to each other.

         (2). For the bare sheathed cable that is allowed to contact, its ampacity value should be multiplied by 0.9 according to this table.

         (3). When laying with spacing, the spacing should be at least 1 cable outer diameter.

  (4).Mineral insulated cables do not allow human contact with bare cables laid in the air.

  (5).Metal sheath temperature 105℃, ambient temperature: 30℃

Standard cross section of conductors mm2

Current carrying capacity A

Two loading conductors,two-core or single-core cables

Three loading conductors

Multi-core or single-core cables  lined up in triangular shape

Connected single-core cables

intervals are created when single-core cables are vertically installed

intervals are created when single-core cables are horizontally installed

 500V

1.5

31

26

29

33

37

2.5

41

35

39

43

49

4

54

46

51

56

64

750V

1.5

33

28

32

35

40

2.5

45

38

43

47

54

4

60

50

56

61

70

6

76

64

71

78

89

10

104

87

96

105

120

16

137

115

127

137

157

25

179

150

164

178

204

35

220

184

200

216

248

50

272

228

247

266

304

70

333

279

300

323

370

95

400

335

359

385

441

120

460

385

411

411

505

150

526

441

469

498

565

185

596

500

530

557

629

240

697

584

617

624

704

300

1012

945

973

1026

1098

400

1197

1129

1161

1209

1312



Note: (1). The two ends of the copper sheath of the single-core cable in the circuit are connected to each other.

        (2). When laying in bundles, the ampacity does not need to be corrected.

        (3). When laying with spacing, the spacing should be at least the outer diameter of one cable.

        (4). The correction factor at ambient air temperature is not equal to 30°C

Temperature of environment

Plastic sheath and touchable bare 70

Untouchable bare cables 105

10

1.26

1.14

15

1.21

1.11

20

1.14

1.07

25

1.07

1.04

35

0.93

0.96

40

0.85

0.92

45

0.77

0.88

50

0.67

0.84

55

0.57

0.8

60

0.45

0.75

65

 

0.7

70

 

0.65

75

 

0.6

80

 

0.54

85

 

0.47

90

 

0.4

95

 

0.32


Nominal cross section mm2

Voltage drop in single-phase  power supply  mV/A/m

Voltage drop in three-phase power supply  mV/A/m

2 connected single-core cables

Multi-core cable

Three single-core cables

Multi-core cables

 Triangular  connected array

Horizontal connected array

Horizontal array with intervals

1

 

42

 

 

 

36

1.5

 

28

 

 

 

24

2.5

 

17

 

 

 

14

4

 

10

 

 

 

9.1

6

 

7

 

 

 

6

10

4.2

4.2

3.6

3.6

3.6

3.6

16

2.6

2.6

2.3

2.3

2.3

2.3

25

1.65

1.65

1.45

1.45

1.45

1.45

35

1.2

 

1.05

1.05

1.05

 

50

0.89

 

0.78

0.97

0.82

 

70

0.62

 

0.54

0.55

0.58

 

95

0.46

 

0.4

0.41

0.44

 

120

0.37

 

0.32

0.33

0.36

 

150

0.3

 

0.26

0.29

0.32

 

185

0.25

 

0.21

0.25

0.28

 

240

0.19

 

0.165

0.21

0.26

 

300

0.15

 

0.13

0.16

0.18

 

400

0.112

 

0.097

0.12

0.14







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