สายไฟ NYY 3X4

Number of core

Nominal cross sectional area

(mm²)

Number and diameter of wire

(No./mm)

Insulation thickness

(mm)

Under Sheath thickness

(mm)

Sheath thickness

(mm)

Max. overall diameter

(mm)

Minimum insulation resistance at 70^oC

(M?-km)

Maximum continuous

current rating

(Ampere)

Cable weight

(approx.) (kg/km)

Standard length

(m)

Free air

Under ground

3

1

1

1.5

1.5

2.5

2.5

4

4

6

10

16

25

35

50

70

95

120

150

185

240

300

1/1.13

7/0.43

1/1.38

7/0.53

1/1.78

7/0.67

1/2.25

7/0.85

7/1.04

7/1.35

7/1.70

7/2.14

19/1.53

19/1.78

19/2.14

19/2.52

37/2.03

37/2.25

37/2.52

61/2.25

61/2.25

0.8

0.8

0.8

0.8

0.8

0.8

0.9

0.9

0.9

1.1

1.1

1.3

1.3

1.5

1.5

1.7

1.7

1.9

2.1

2.3

2.5

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

0.8

1.2

1.2

1.2

1.5

1.5

1.5

1.8

1.8

2.0

2.0

1.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

1.8

2.0

2.0

2.0

2.2

2.2

2.4

2.6

2.8

3.0

3.2

3.4

12.5

13.0

13.0

13.5

14.0

15.0

15.5

16.5

18.0

20.5

24.5

28.5

31.5

36.0

40.5

46.0

50.5

56.0

61.5

69.0

76.0

0.0414

0.0135

0.0123

0.0116

0.0102

0.0093

0.0094

0.0085

0.0073

0.0069

0.0057

0.0054

0.0047

0.0046

0.0039

0.0038

0.0034

0.0034

0.0034

0.0033

0.0032

12

12

16

16

21

21

28

28

37

50

67

89

109

131

163

202

235

269

311

371

427

18

18

22

22

30

30

39

39

50

68

87

113

137

162

200

240

273

306

346

402

453

180

180

200

210

240

260

320

350

440

650

950

1,400

1,700

2,300

3,100

4,200

5,000

6,500

8,000

10,000

12,500

100/C

100/C

100/C

100/C

100/C

100/C

100/C

100/C

100/C

500/D

500/D

500/D

500/D

500/D

500/D

500/D

500/D

500/D

500/D

500/D

500/D