BMI CABLES PRIVATE LTD>
 
Current Ratings and Associated Voltage Drop for Flexible Cords Insulated with PVC or VIR or Butyl Rubber / EPR or Silicone Rubber.
MAIN  APPLICATION : Internal Wiring, Mains Supply Connection/Extension leads to Appliances.
 
 
 
 
Construction

Nominal Cross
Sectional Area of Conductor
(mm2)

Nominal No. and Diameter of Wires
(Nos/mm)

Approx. over all Dia of
Conductor
(mm)

Max Allowable Resistence at 20C for tinned wires(0hms/km)
Current rating D.C. in Single or Three phase (A)

Approx. voltage Drop Per
10 meter run

(Volts)
Max. permissible weight supported by twin flexible cords (Kg)
Single Core Multi Core

0.5

16/0.20

0.93

38.20

40.10

3

3.30

1.50

0.75

24/0.20

1.14

25.40

26.70

6

3.70

2.50

1.0

32/0.20

1.32

19.10

20.00

10

4.50

4.50

1.5

30/0.25

1.60

13.0

13.70

15

4.00

4.50

2.5

50/0.25

2.00

7.82

8.21

20

2.90

4.50

4.0

56/0.30

2.60

4.85

5.09

25

2.60

4.50

 
Note :
          (1) Current ratings are for cables to IS 694 Part-1 (PVC) and IS 9968 Part-1 (Rubber) or B.S. 6500.
          (2) All the above ratings are based on an ambient temp. of 30C and are in accordance with IEE regulation.They are application to cords laid                straight                and not in coils. ;
          (3) Rating factors for ambient temperature (applicable to PVC or VIR)
             

Ambient temperature (°C)

30

35

40

45

50

55

Rating Factor

1.00

0.96

0.92

0.87

0.71

0.50

 

             (4)  For flexible cords insulated with EPR / Butyl (85°C) or Silicone rubber (150°C) and heat resistance. sheathe the rating factor are.

             (a)  EPR / Butyl Rubber
Ambient Temperature (°C) 30.50 55 60

65

70

Rating Factor 1.0 0.96 0.63

0.67

0.47

           
             (b)  Silicone Rubber
Ambient Temperature (°C) 35.120 125
130
135 140
Rating Factor 1.0 0.96 0.85

0.74

0.60

 

Current Ratings and Associated Voltage Drop for Flexible Cables Insulated with VIR or Butyl Rubber/ EPR or Silicone Rubber Main Applications : Services or Mains Supply where flexibility is required.
 
 

Nominal cross Sectional Area of Conductor

Nominal

No. and Diameter of Wire

Approx.

Over All Dia of Conductor

Max. Allowable Resistence

at 20C for Tinned Wires

Current Rating VIR insulated Butyl/EPR/Silicone Rubber Insulated

Voltage Drop volts / Km. / Amp.

VIR Insulated

Butyl/EPR/Silicone Rubber Insulated

VIR Insulated

Butyl/EPR/Silicone Rubber Insulated

Single Core

Multi Core

DC or Single

Phase AC

Three

Phase

DC or Single Phase

AC

Three

Phase

DC

Single

Phase

Three

Phase AC

DC

Single

Phase

Three

Phase AC

(mm2)

(No./mm)

(mm2)

(ohms/Km)

(ohms/Km)

(A)

(A)

(A)

(A)

(mV)

(mV)

(mV)

(mV)

(mV)

(mV)

4

56/0.30

2.60

4.85

5.09

33

28

40

31

11

11

9.7

13

13

11.5

6

84/0.30

3.30

3.23

3.39

42

36

51

44

7.3

7.3

6.6

7.9

7.9

7.2

10

80/0.40

4.20

1.85

1.96

57

49

70

60

4.2

4.2

3.8

4.6

4.6

4.2

16

126/0.40

5.70

1.18

1.24

76

66

93

81

2.7

2.7

2.4

2.9

2.9

2.6

25

196/0.40

7.10

0.757

0.796

100

85

120

105

1.7

1.7

1.6

1.9

1.9

1.7

35

276/0.40

8.50

0.538

0.565

120

100

145

125

1.2

1.24

1.10

1.3

1.3

1.2

50

396/0.40

10.30

0.375

0.393

150

130

185

160

0.85

0.88

0.79

0.93

0.96

0.85

70

360/0.50

12.40

0.264

0.277

180

160

225

195

0.80

0.64

0.56

0.65

0.68

0.61

95

475/0.50

14.50

0.200

0.210

220

190

270

235

0.45

0.50

0.43

0.49

0.53

0.47

120

608/0.50

16.00

0.156

0.164

250

220

306

270

0.36

0.41

0.35

0.38

0.43

0.38

150

756/0.50

18.00

0.126

0.132

290

250

355

306

0.29

0.34

0.29

0.31

0.36

0.31

185

925/0.50

20.00

0.103

0.108

330

285

405

350

0.23

0.30

0.25

0.26

0.32

0.27

240

1221/0.50

23.00

0.078

0.0817

390

330

465

405

0.18

0.25

0.21

0.20

0.27

0.22

300

1525/0.50

26.00

0.0623

0.0654

435

385

530

470

0.14

0.23

0.18

0.16

0.24

0.199

400

2013/0.60

30.50

0.0472

0.0400

520

630

0.11

0.21

0.12

0.21

500

1769/0.60

33.00

0.0373

0.0391

590

720

0.09

0.19

0.10

0.20

630

2257/0.60

37.00

0.0292

0.0306

680

830

0.07

0.18

0.06

0.19


 
Note :
(1) Current ratings are for cables to IS 9968 (PI-1) or BS 6007
(2) Rating for one twin cable or two angle cores bunched.
(3) Rating for three four of five core cable
(4) The rating as given above are for a tangle circuit and are based on an ambient temp. Of 30C Rating factor for ambient temperature .

Rating factor for ambient temperature .

 

 

 

 

 

 

 

Ambient Temperature (°C)

35

40

45

50

55

60

70

Factor for VIR insulation (°C)

0.91

0.82

0.71

0.57

0.41

-

-

Factor for Butyl/EPR insulation (85°C)

0.93

0.86

0.80

0.72

0.63

0.54

0.31

Nominal Cross Selection Area of Conductor

Max Allowable Resistence at 20C for tinned wires Multi Core

CURRENT RATINGS UP TO 10 kv GRADE

CURRENT RATINGS ABOVED TO 10 kv GRADE

EI (VIR) Insulated

E2 (EPR) Insulated

VIR Insulated

EPR Insulated

(mm2)

(ohms/km)

(A)

(A)

(A)

(A)

2.5

0.21

25

32

-

-

4

5.09

34

43

-

-

6

3.39

44

56

-

-

10

1.95

60

78

-

-

16

1.24

80

104

85

110

25

0.795

107

138

113

146

35

0.565

133

171

141

181

50

0.393

165

213

175

226

70

0.277

204

263

216

279

95

0.210

245

317

260

336

120

0.164

287

370

304

391

150

0.132

329

425

349

450

185

0.108

375

485

398

514


Note : (1) This table covers current ratings of flexible trailing cable armoured/unarmoured conforming to IS: 9968 Part 1&2 IS:14494,VDE 0250 NCB and other equivalent                international specifications.
          (2) The ratings as given above are based on ambient temp. 30C for higher temp. refer to the following table of correction factors.
          (3) Rating factor for "MONOSPIRAL" reeling drum winding duty is 0.85
          (4) For reeling-unreeling operation rating factors are as follows :
No. of times 1 2 3 4
Derating Factor

0.76

0.58

0.47

0.40

 
Rating Factors for Ambient                                  Temperature
Ambient Temperature (°C)

25

30

35

40

45

50

55

60

70

Factor for VIR Insulation

1.08

1.0

0.91

0.82

0.71

0.58

0.41

Factor for EPR Insulation

1.05

1.0

0.95

0.90

0.85

0.80

0.74

0.67

0.52

Ambient Temperature (°C)

35-85

90

100

110

120

130

140

Factor for SILICON Insulation

1.0

0.96

0.88

0.78

0.68

0.55

0.39

 
   
   
 
 
ELASTOMERIC FLEXIBLE CABLES (As per IS 9968 / Part II /02)

Conductor

SIZE OF GROUNDING CONDUCTOR                                      SIZES (Sq.mm)

Power conductor

16

25

35

50

70

95

120

150

185

240

300

Grounding conductor

16

16

16

25

35

50

70

70

95

120

150

 
Thickness Insulation

Conductor
Size

Insulation Thickness

1.9/3.3 and
3.3/3.3 kV

3.8/6.6 kV

6.6/6.6 and
6.35/11 kV

11/11 kV
12.7/22 kV

(Sq.mm)

(mm)

(mm)

(mm)

(mm)

16

2.2

3.0

4.0

6.0

25

2.2

3.0

4.0

6.0

35

2.2

3.0

4.0

6.0

50

2.2

3.0

4.0

6.0

70

2.2

3.0

4.0

6.0

95

2.4

3.0

4.0

6.0

120

2.4

3.0

4.0

6.0

150

2.4

3.0

4.0

6.0

185

2.4

3.0

4.0

6.0

Diameter Under Inner Sheath

Thickness of Sheath

Above

Up to & Including

Inner

Outer

(mm)

(mm)

(mm)

(mm)

10

1.0

1.6

10

15

1.2

2.0

15

20

1.4

2.2

20

25

1.6

2.5

25

30

1.8

3.0

30

40

2.0

3.5

40

50

2.4

4.0

50

60

2.8

4.5

60

70

3.2

5.0

70

80

3.6

5.5

80

4.0

6.0


 

ELASTOMERIC   INSULATED   FLEXIBLE   CABLES  FOR   USE   IN   MINES
(AS   PER   IS   :   14494/98)
SIZE  OF   POWER,   EARTHING  &   PILOT   CONDUCTORS

Power Conductor

Sq.mm

2.5

4

6

10

16

25

35

50

70

95

120

150

185

Earthing
Conductor

Type-A

Sq.mm

2.5

4

6

10

16

16

16

25

35

50

70

70

95

Type-B

Sq.mm

2.5

4

6

10

16

25

35

50

70

95

120

150

185

Pilot Conductor

Sq.mm

2.5

4

6

10

16

16

16

25

35

50

70

70

95

 
INSULATION THICKNESS

Conductor

SIZE OF GROUNDING CONDUCTOR                                      SIZES (Sq.mm)

Power conductor

16

25

35

50

70

95

120

150

185

240

300

Grounding conductor

16

16

16

25

35

50

70

70

95

120

150

 
INSULATION THICKNESS

Nom. Area of conductor
(Sq. mm)

Nom.Thickness of Insulation For Power Cores

1.1 kV (mm)

3.3 kV (mm)

3.8/6.6 kV (mm)

6.35/11 kV (mm)

2.5

1.0

4

1.0

6

1.0

10

1.2

16

1.2

2.2

3.0

4.0

25

1.4

2.2

3.0

4.0

35

1.4

2.2

3.0

4.0

50

1.6

2.2

3.0

4.0

70

1.6

2.2

3.0

4.0

95

1.8

2.4

3.0

4.0

120

1.8

2.4

3.0

4.0

150

2.0

2.4

3.0

4.0

185

2.2

2.4

3.0

4.0

 
Note : 1. The nominal thickness of insulation for pilot core(s) shall be 1.0mm. However, higher thickness whenever required to build up the diameter is permitted.
             2.The thickness of covering on earth conductor(s) shall be suitably selected for covered earth conductor(s)
 

THICKNESS OF INNER & OUTER SHEATH (except for Collective Metallic Screened and Pliable Wire Armoured Cables)

THICKNESS OF INNER & OUTER SHEATH (for Collective Metallic Screened and Pliable Wire Armoured Cables)

Calculated Dia. Under
Inner Sheath

Thickness of Sheath

Over
(mm)

Up to and Including
(mm)

Inner Min.
(mm)

Outer Nom.
(mm)

10

1.4

2.0

10

15

1.6

2.4

15

20

1.8

2.6

20

25

2.0

2.8

25

30

2.2

3.0

30

40

2.4

3.2

40

50

2.8

3.6

50

60

3.2

4.0

60

70

3.6

4.5

70

80

4.0

5.0

80

4.4

5.5

Calculated Dia. Under Inner Sheath for choosing thickness of inner sheath & calculated dia. under outer sheath for choosing thickness of outer sheath

Thickness of Sheath

Over

(mm)

Up to and Including

(mm)

Inner Min.

(mm)

Outer Nom.

(mm)

10

1.6

2.5

10

15

1.8

2.8

15

20

2.0

3.2

20

25

2.2

3.6

25

30

2.4

4.0

30

40

2.6

4.5

40

50

3.0

5.0

50

60

3.5

5.7

60

70

4.0

6.4

70

80

4.5

7.1

80

90

5.0

7.8

90

100

5.5

8.5

100

6.0

9.0


 
DIMENSION OF PLIABLE WIRE ARMOUR AND BRAIDING WIRE (As per IS : 9968/Pt-II/81 & IS : 14494/98) Why "BMI" cables are better?

Diameter Under Armour

Size of Armour Strand (No.s / mm)

Diameter of Braiding Wire (mm)

Above

(mm)

Up to and including

(mm)

25

7/0.45

0.30

25

40

7/0.71

0.45

40

60

7/0.90

0.45

60

7/1.25

0.45


1.   High current carrying capacity due to low conductor resistance.
2.   High insulation resistance.
3.   Small bending radius.
4.   Long service life.
5.   Good Ageing characteristics.
6.   Heat resisting, Oil resisting & Flame retardent property.
7.   Ozone resistant.
8.   Extra flesibility due to super annealed copper wire & good elasticity of compound.
9.   Excellent mechanical features of the insulation improves the protection against external
      effects.
10. Packing material suitable for handling.
11. Fast delivery period for any cable.

 
All Copyright Reserved by BMI Cables Private Ltd.
Developed by :ValleSoft
Home    l    About Us   l   Products   l   Certificates
Infrastructure    |   Clients   l   Enquiry   l   Contact