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64

Wires & Cables

Copper conductor

cross section

2

mm

Reduction Factor

Number of

simultaneous

loaded

conductors on

each tray

Installation

Method

1.5

2.5

4

6

10

16

25

35

50

70

95

120

150

35

48

64

84

118

158

212

262

330

420

499

580

670

30

41

54

71

100

134

180

223

281

357

424

493

570

28

38

51

66

93

125

167

207

261

332

394

458

529

26

36

48

63

89

119

159

197

248

315

374

435

503

33

46

61

80

112

150

201

249

314

399

474

551

637

28

39

52

68

96

128

172

212

267

340

404

470

543

25

35

46

60

85

114

153

189

238

302

359

418

482

24

33

44

57

80

107

144

178

224

286

339

394

456

23

32

42

55

78

104

140

173

218

277

329

383

442

22

31

41

54

76

101

136

168

211

269

319

371

429

22

30

40

53

74

100

134

165

208

265

314

365

422

22

30

40

52

73

98

131

162

205

260

309

360

415

21

29

39

51

72

96

129

160

201

256

304

354

409

1

1

2

0.85

3

0.79

4

0.75

1

0.95

2

0.81

3

0.72

4

0.68

5

0.66

6

0.64

7

0.63

8

0.62

9

0.61

fixed on a ceiling or under floor

Current Carrying capacity in A

on floor or wall

In conduit

in a void or

in a pipe

1

1

2

0.8

3

0.7

4

0.65

5

0.6

6

0.57

7

0.54

8

0.52

9

0.5

10

0.48

12

0.45

14

0.43

16

0.41

20

0.38

Current Carrying capacity in (A) Duct

29

39

52

66

92

120

160

196

248

309

426

457

23

31

42

53

74

96

128

157

198

247

341

366

20

27

36

46

64

84

112

137

174

216

298

320

19

25

34

43

60

78

104

127

161

201

277

297

17

23

31

40

55

72

96

118

149

185

256

274

Size

17

22

30

38

52

68

91

112

141

176

260

243

16

21

28

36

50

65

86

106

134

167

230

247

15

20

27

34

48

62

83

102

129

161

222

238

15

20

26

33

46

60

80

98

124

155

213

229

14

19

25

32

44

58

77

94

119

148

204

219

13

18

23

30

41

54

72

88

112

139

192

206

12

17

22

28

40

52

69

84

107

133

183

197

12

16

21

27

38

49

66

80

102

127

175

187

11

15

20

25

35

46

51

74

94

117

162

174

2

mm

1.5

2.5

4

6

10

16

25

35

50

70

95

120