ELECTRICAL PANEL'S MCB-CABLE SIZE CALCULATION

SYSTEM DETAILS :Panel Load Detail:System Voltage (RL-YL) 430 Volt Load on R Phase 51System Voltage (YL-BL) 415 Volt Load on Y Phase 61System Voltage (YL-BL) 430 Volt Load on BPhase 41System Voltage Max (L-L) 425 Volt Voltage Difference 1.18%System Voltage (L-N) 245 Volt 18Ambient Temperature (K1) 40 °C Expected Temp Rise 0Ground Temperature (K2) 35 °C Total Load (L-L) 61Soil Thermal Resistivity Not Known Ω 20%Nature of Soil (K3) Wet Soil Total Connected Hp 30

38

Details of Connected Electrical Load on Main Panel

Phase P.F

Air Ground

1 2 Kw Feeder.I 3 Ph 1 0.8 Ground 1 Nill

2 2 Kw Feeder.I 1 Ph R 1 0.8 Ground 1 1 1 Nill

3 2 Kw Feeder.IX 3 Ph 1 0.8 Air 1 1

4 2 Kw Feeder.II 3 Ph 1 0.8 Air 1 1

5 2 Kw Feeder.VIII 3 Ph 1 0.8 Air 1 1

6 2 Kw Feeder.VII 3 Ph 1 0.8 Air 1 1

7 2 Kw Feeder.VI 3 Ph 1 0.8 Air 1 1

8 2 Kw Feeder.II 3 Ph 1 0.8 Air 1 1

9 2 Kw Feeder.I 1 Ph Y 1 0.8 Air 1 1

10 2 Kw Feeder.I 1 Ph Y 1 0.8 Air 1 1

11 2 Kw Feeder.X 3 Ph 1 0.8 Air 1 1

12 2 Kw Feeder.III 3 Ph 1 0.8 Air 1 1

13 2 Kw Feeder.I 3 Ph 1 0.8 Air 1 1

14 2 Kw Feeder.IV 3 Ph 1 0.8 Air 1 1

15 2 Kw Feeder.V 3 Ph 1 0.8 Air 1 1

Note:

SYSTEM DETAILS

1 Enter Your System Detsils

MAINPANEL DETAILS

1 Enetr Your Main Panel Capacity and Size of Incoming Cable of Main Panel

2 Enter Outgoing Circuit Capacity of Main Panel

ELECTRICAL LOAD DETAILS OF MAIN PANEL

1 Enter connected Electrical Load in KW or HP

2 Select Your Electrical Circuit3 Select Your Electrical Circuit's Phase (3 Phase or 1 Phase)4 Enter P.F5 Select Cable installation media (Ground/Air)6 Enter Appropiate Details for Air or Ground Media7 Enter Allowable Voltage Drop for that Circuit8 Enter Total Length of that Circuit

Jignesh.Parmar, www.electricalnotes.wordpress.com ,jiguparmar@yahoo.com

UnBalance Neutral Current

Unbalance Current (Amp)Total Connected KVA

Sr. No

Total Connected

Load

Hp / Kw

OutGoing Feeder

Load on

PhaseDemand Factor

Cable Installation Media

No of Cable/ Tray

No of Tray

No of Cable/ Trench

Distance Between

Cable

9 Select Type of Cable

ELECTRICAL PANEL'S MCB-CABLE SIZE CALCULATION

:Panel Load Detail: :Size of Panel / Incoming Cabel: :Panel MCB Size:Amp Size of Panel: Main MCB 80Amp Main Panel Capacity: 45 KVA MCB-Feeder.I 32Amp Main Panel Capacity: 61 Amp MCB-Feeder.II 10

Size of Incoming Cable MCB-Feeder.III 6Amp LT XLPE Insulated (1.1KV) MCB-Feeder.IV 6

°C 3cX 25 MCB-Feeder.V 6Amp AL MCB-Feeder.VI 6

Main Cable Capacity 99 Amp MCB-Feeder.VII 6Kw Actual Load on Cable 61 Amp MCB-Feeder.VIII 6

KVA Selection of Main Cable O.K MCB-Feeder.IX 6MCB-Feeder.X 6

Details of Connected Electrical Load on Main Panel

Type of Cable

Size Type

1 6% 10 PVC Flexible (Up to 1.1KV) 3cX0.5 AL 2 2.5

1 6% 10 PVC Flexible (Up to 1.1KV) 1cX1 AL 2 2.5

1 6% 10 HT XLPE Cable (11 KV Earthed) 1cX50 AL 2 2.5

1 6% 10 LT XLPE Insulated (1.1KV) 1cX6 AL 2 2.5

1 6% 10 LT XLPE Insulated (1.1KV) 1cX50 AL 2 2.5

1 6% 10 HT XLPE Cable (11 KV Earthed) 1cX70 CU 2 2.5

1 6% 10 HT XLPE Cable (11 KV Earthed) 1cX95 AL 2 2.5

1 6% 10 HT XLPE Cable (11 KV Earthed) AL 2 2.5

1 6% 10 HT XLPE Cable (11 KV Earthed) AL 2 2.5

1 6% 10 PVC Flexible (Up to 1.1KV) 1cX0.5 AL 2 2.5

1 6% 10 PVC Flexible (Up to 1.1KV) 1cX16 AL 2 2.5

1 6% 10 LT XLPE Insulated (1.1KV) 1cX16 CU 2 2.5

1 6% 200 1cX70 AL 2 2.5

1 6% 10 HT XLPE Cable (6.6 KV Earthed) AL 2 2.5

1 6% 10 HT XLPE Cable (11 KV Earthed) CU 2 2.5

44.99912

Jignesh.Parmar, www.electricalnotes.wordpress.com ,jiguparmar@yahoo.com

Selection of Main Incoming Cable:

No. of runs

of Cable

Allowable voltage drop (%)

Cable Length (Meter)

Consumed Load (Kw)

Load (Kva)Alu/

Cu

1cX1201cX15

0

HT XLPE Cable (11 KV Un Earthed) 1cX12

01cX185

3cX 240

Cable DetailCable Detail Correction FactorCorrection Factor MCB / Feeder DetailsMCB / Feeder Details

:Panel MCB Size: :Panel Feeder Current Detail:Amp Load on Feeder R Y B Max 64Amp Feeder.I 17 27 7 27 AmpAmp Feeder.II 7 7 7 7 AmpAmp Feeder.III 3 3 3 3 AmpAmp Feeder.IV 3 3 3 3 AmpAmp Feeder.V 3 3 3 3 AmpAmp Feeder.VI 3 3 3 3 AmpAmp Feeder.VII 3 3 3 3 AmpAmp Feeder.VIII 3 3 3 3 AmpAmp Feeder.IX 3 3 3 3 AmpAmp Feeder.X 3 3 3 3 Amp

Details of Connected Electrical Load on Main Panel

Cable Selection Cable Design

3 3 4 0.8% O.K Not Economical10 10 11 2.3% O.K Economical 3 3 170 0.0% O.K Not Economical3 3 45 0.0% O.K Not Economical3 3 170 0.0% O.K Not Economical3 3 275 0.0% O.K Not Economical3 3 260 0.0% O.K Not Economical3 3 305 0.0% O.K Not Economical

10 10 345 0.0% O.K Not Economical10 10 4 4.5% O.K Economical 3 3 62 0.0% O.K Not Economical3 3 106 0.0% O.K Not Economical3 3 215 0.2% O.K Not Economical3 3 305 0.0% O.K Not Economical3 3 510 0.0% O.K Not Economical

Full Load Current (Amp)

Full Load Current

After Derating

(Amp)

Current Capacity of Cable (Amp)

Actual Voltage Drop (%)

0

RemarksCosØ SinØ

425 1.73 0.8 0.60 39.00

245 2.00 0.8 0.60 19.50

425 1.73 0.8 0.60 0.82

425 1.73 0.8 0.60 1.55

425 1.73 0.8 0.60 0.82

425 1.73 0.8 0.60 0.57

425 1.73 0.8 0.60 0.41

425 1.73 0.8 0.60 0.33

245 2.00 0.8 0.60 0.27

245 2.00 0.8 0.60 39.00

425 1.73 0.8 0.60 1.21

425 1.73 0.8 0.60 1.54

425 1.73 0.8 0.60 0.57

425 1.73 0.8 0.60 0.33

425 1.73 0.8 0.60 0.21

3cX1.5

Conductor Resistance. (Ohm / km)

Ground Factor Ambient Factor

39.00 0.89 1.13 1 1.0057

19.50 0.89 1.13 1 1.0057

0.82 1 1 1.0000

1.55 1 1 1.0000

0.82 1 1 1.0000

0.57 1 1 1.0000

0.41 1 1 1.0000

0.33 1 1 1.0000

0.27 1 1 1.0000

39.00 1 1 1.0000

1.21 1 1 1.0000

1.54 1 1 1.0000

0.57 1 1 1.0000

0.33 1 1 1.0000

0.21 1 1 1.0000

Total Derating Factor

Conductor Reactance. (Mho / km)

Ground Temperatur

e (K2)

Correction Factor

(K3)

Group Factor for Ground

(K4)

Ambient Temperature

(K1)

Group Factor for Air (K5)

17 2773333333

3

425 0

51 61 41 41

R Y B 3 Ph KW

Air 10 1 0 0 0 3 2Ground 15 2 10 0 0 0 2

20 3 0 0 0 3 2

1 25 4 0 0 0 3 2

1.5 35 5 0 0 0 3 2

2 40 6 0 0 0 3 2

2.5 45 0 0 0 3 2

3 50 Nill 0 0 0 3 2Not Known 55 Cable Dia 0 10 0 0 2

60 0.125 mt 0 10 0 0 2

Very Wet Soil 65 0.25 mt 0 0 0 3 2

Wet Soil 70 0.5 mt 0 0 0 3 2

Damp Soil 75 0 0 0 3 2

Dry Soil 80 0 0 0 3 2

Very Dry Soil 0 0 0 3 2R Kva

Hp Y Hp

Kw B Kw

1 Ph Feeder.I MCB-Feeder.I

3 Ph AL Feeder.II MCB-Feeder.IICU Feeder.III MCB-Feeder.III

Feeder.IV MCB-Feeder.IVNO. OF RUNS Feeder.V MCB-Feeder.V

1 Feeder.VI MCB-Feeder.VI

2Feeder.VII MCB-Feeder.VII

3 Feeder.VIII MCB-Feeder.VIII4 Feeder.IX MCB-Feeder.IX5 Feeder.X MCB-Feeder.X6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

7 7 7

1 2

17 27 7 7 7 7 7 7

R Y B 3 Ph R Y B 3 Ph

0 0 0 3 0 0 0 0

10 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 3

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 3

0 10 0 0 0 0 0 0

0 10 0 0 0 0 0 0

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0

0 0 0 3 0 0 0 0

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0

3 3 3 3 3 3 3

3 4 5

3 3 3 3 3 3 3 3 3

R Y B 3 Ph R Y B 3 Ph R

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 3.396278 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 3 0

0 0 0 0 0 0 0 0 0

3 3 3 3 3 3 3

5 6 7

3 3 3 3 3 3 3 3 3

Y B 3 Ph R Y B 3 Ph R Y

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 3.3962777 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 3.396278 0 0 0 0 0 0

3 3 3 3 3 3 3

7 8 9

3 3 3 3 3 3 3 3 3

B 3 Ph R Y B 3 Ph R Y B

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 3.3962777 0 0 0

0 3.3962777 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0

3 3 3

9 10

3 3 3 3 3

3 Ph R Y B 3 Ph

0 0 0 0 0

0 0 0 0 0

3.3962777 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 3.3962777

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

PVC Flexible (Up to 1.1KV) 1cX0.5LT PVC Insulated (1.1KV) 1cX0.75LT XLPE Insulated (1.1KV) 1cX1HT XLPE Cable (6.6 KV Earthed) 1cX1.5HT XLPE Cable (11 KV Earthed) 1cX2.5HT XLPE Cable (11 KV Un Earthed) 1cX4

1cX6

1cX10

1cX16

1cX25

1cX35

1cX50

1cX70

1cX951cX120

2cX0.5

2cX0.75

2cX1

2cX1.5

2cX2.5

2cX4

3cX0.5

3cX0.75

3cX1

3cX1.5

3cX2.5

3cX4

1cX4 1cX25

1cX6 1cX35

1cX10 1cX50

1cX16 1cX70

1cX25 1cX95

1cX35 1cX120

1cX50 1cX150

1cX70 1cX185

1cX95 1cX240

1cX120 1cX300

1cX150 1cX400

1cX185 1cX 500

1cX240 1cX 630

1cX300 1cX800 1cX400 1cX1000

1cX 500 3cX 25

1cX 630 3cX 35

1cX800 3cX 50

1cX1000 3cX 70

2cX1.5 3cX 95

2cX2.5 3cX 120

2cX4 3cX 150

2cX 6 3cX 185

2cX10 3cX 240

2cX16 3cX 300

2cX25 3cX 400

2cX35

2cX50

2cX70

2cX95

2cX120

2cX150

2cX185

2cX240

2cX300

2cX400

2cX500

2cX630

3cX1.5

3cX2.5

3cX4

3cX 6

3cX 10

3cX 16

3cX 25

3cX 35

3cX 50

3cX 70

3cX 95

3cX 120

3cX 150

3cX 185

3cX 240

3cX 300

3cX 400

3cX 500

3cX 630

3.5X16

3.5X25

3.5X35

3.5X50

3.5X70

3.5X95

3.5X120

3.5X150

3.5X185

3.5X240

3.5X300

3.5X400

3.5X500

3.5X630

4cX 1.5

4cX 2.5

4cX4

4cX 6

4cX 10

4cX16

4cX 25

4cX35

4cX 50

4cX70

4cX 95

4cX 120

4cX 150

4cX 185

4cX 240

4cX 300

4cX 400

4cX 500

4cX 630

Cable Derating Factors

Temperature Corrrection Factor:K1 Ground Corrrection Factor:K2

Ambient Temp© Insulation Insulation

PVC XLPE/EPR PVC XLPE/EPR10 1.22 1.15 10 1.1 1.0715 1.17 1.12 15 1.05 1.0420 1.12 1.08 20 0.95 0.9625 1.06 1.04 25 0.89 0.9335 0.94 0.96 35 0.77 0.8940 0.87 0.91 40 0.71 0.8545 0.79 0.87 45 0.63 0.850 0.71 0.82 50 0.55 0.7655 0.61 0.76 55 0.45 0.7160 0.5 0.71 60 0 0.6565 0 0.65 65 0 0.670 0 0.58 70 0 0.5375 0 0.5 75 0 0.4680 0 0.41 80 0 0.38

(Temperature Derating factor)

Temp PVC Flexible LT PVC LT XLPE HT XLPE25 1.25 1.16 1.28 1.1430 1.16 1.1 1.22 1.135 1.09 1.05 1.134 1.0440 1 1 1 145 0.9 0.94 0.975 0.9550 0.8 0.88 0.878 0.955 0.69 0.82 0.768 0.8560 0.62 0.74 0.658 0.8

Ground Temp©

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Ther.Resi Corrrection Factor:K3 Ground Cable Dist Correction Factor(K4)

Soil Thermal Resistivity: 2.5 KM/W No of Circuit Nill cable Dia 0.125m 0.25mResistivity K3 1 1 1 1 1

1 1.18 2 0.75 0.8 0.85 0.91.5 1.1 3 0.65 0.7 0.75 0.82 1.05 4 0.6 0.6 0.7 0.75

2.5 1 5 0.55 0.55 0.65 0.73 0.96 6 0.5 0.55 0.6 0.7

Soil Corrrection Factor:K3Nature of Soil K3 (Cable Grouping factor)==No of TrayVery Wet Soil 1.21 1 2 3 4

Wet Soil 1.13 1 1 1 1 1Damp Soil 1.05 2 0.84 0.8 0.78 0.77

Dry Soil 1 3 0.8 0.76 0.74 0.73Very Dry Soil 0.86 4 0.78 0.74 0.72 0.71

5 0.77 0.73 0.7 0.69

6 0.75 0.71 0.7 0.68

Depth Facator (K5) 7 0.74 0.69 0.675 0.66

Laying Depth(mt) Rating Factor 8 0.73 0.69 0.68 0.670.5 1.10.7 1.050.9 1.011 1

1.2 0.981.5 0.96

No of Cable/Tray

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Ground Cable Dist Correction Factor(K4)

0.5m1

0.90.850.80.80.8

(Cable Grouping factor)==No of Tray6 81 1 1

0.76 0.75 20.72 0.71 30.7 0.69 40.68 0.67 6

0.68 0.66 8

0.66 0.64

0.66 0.64

Cable Details PVC Flexible

1cX0.5 39 0 4 4 0.057

1cX0.75 26 0 7 7 0.100

1cX1 19.5 0 11 11 0.157

1cX1.5 13.3 0 15 15 0.214

1cX2.5 7.98 0 19 19 0.271

1cX4 4.95 0 26 26 0.371

1cX6 3.3 0 35 35 0.500

1cX10 1.91 0 46 46 0.657

1cX16 1.21 0 62 62 0.886

1cX25 0.78 0 80 80 1.143

1cX35 0.554 0 102 102 1.457

1cX50 0.386 0 138 138 1.971

1cX70 0.272 0 214 214 3.057

1cX95 0.206 0 254 254 3.629

1cX120 0.161 0 300 300 4.286

2cX0.5 39 0 4 4 0.057

2cX0.75 26 0 7 7 0.100

2cX1 19.5 0 11 11 0.157

2cX1.5 13.3 0 15 15 0.214

2cX2.5 7.98 0 19 19 0.271

2cX4 4.95 0 26 26 0.371

3cX0.5 39 0 4 4 0.057

3cX0.75 26 0 7 7 0.100

3cX1 19.5 0 11 11 0.157

3cX1.5 13.3 0 15 15 0.214

3cX2.5 7.98 0 19 19 0.271

3cX4 4.95 0 26 26 0.371

1.1 KV PVC InsulatedAluminium Copper Current Capacity

Resi React Resi React Aluminium Cu

ohm/km ohm/km ohm/km ohm/km Amp Amp

1cX4 8.8 0.158 5.52 0.158 — 35

1cX6 5.53 0.148 3.69 0.148 35 44

1cX10 3.7 0.138 2.19 0.138 47 60

1cX16 2.29 0.128 1.38 0.128 64 82

1cX25 1.44 0.12 0.87 0.12 84 110

1cX35 1.04 0.114 0.627 0.114 105 130

1cX50 0.77 0.11 0.463 0.11 130 165

1cX70 0.53 0.103 0.321 0.103 155 205

1cX95 0.38 0.101 0.231 0.101 190 245

1cX120 0.3 0.096 0.184 0.096 220 280

1cX150 0.25 0.094 0.149 0.094 250 320

1cX185 0.2 0.092 0.12 0.092 290 370

1cX240 0.15 0.09 0.091 0.09 335 425

1cX300 0.12 0.088 0.074 0.088 380 475

1cX400 0.094 0.088 0.059 0.088 435 550

1cX 500 0.0726 0.087 0.046 0.087 480 590

Nominal Conductor Area (Sq.mm)

Maximum Conductor

Resistance at 20°C (ohm/km)

Maximum Conductor

Reactance at 20°C (ohm/km)

Aluminium Current Carrying Capacity (Amp)

Copper Current Carrying

Capacity (Amp)

Nominal Conductor

Area (Sq.mm)

1cX 630 0.0563 0.086 0.037 0.086 550 660

1cX800 0.044 0.083 0.031 0.083 610 725

1cX1000 0.0349 0.082 0.027 0.082 680 870

2cX1.5 21.72 0.126 14.5 0.126 16 20

2cX2.5 14.52 0.119 8.87 0.119 21 27

2cX4 8.89 0.116 5.52 0.116 27 35

2cX 6 5.53 0.11 3.69 0.11 35 45

2cX10 3.7 0.1 2.19 0.1 47 60

2cX16 2.29 0.097 1.38 0.097 59 78

2cX25 1.44 0.097 0.87 0.097 78 105

2cX35 1.04 0.097 0.627 0.097 99 125

2cX50 0.77 0.094 0.463 0.094 125 155

2cX70 0.53 0.09 0.321 0.09 150 195

2cX95 0.38 0.09 0.231 0.9 185 230

2cX120 0.3 0.087 0.184 0.087 210 265

2cX150 0.25 0.087 0.149 0.087 240 305

2cX185 0.2 0.087 0.12 0.087 275 350

2cX240 0.15 0.087 0.091 0.087 325 410

2cX300 0.12 0.086 0.073 0.086 365 465

2cX400 0.09 0.086 0.059 0.086 420 530

2cX500 0.09 0.086 0.059 0.086 475 605

2cX630 0.09 0.086 0.059 0.086 540 785

3cX1.5 21.72 0.126 14.5 0.126 13 17

3cX2.5 14.52 0.119 8.87 0.119 18 24

3cX4 8.89 0.116 5.52 0.116 23 30

3cX 6 5.53 0.11 3.69 0.11 30 39

3cX 10 3.7 0.1 2.19 0.1 40 52

3cX 16 2.29 0.097 1.38 0.097 51 66

3cX 25 1.44 0.097 0.87 0.097 70 90

3cX 35 1.04 0.097 0.627 0.097 86 110

3cX 50 0.77 0.094 0.463 0.094 105 135

3cX 70 0.53 0.09 0.321 0.09 130 165

3cX 95 0.38 0.9 0.231 0.09 155 200

3cX 120 0.3 0.087 0.184 0.087 180 230

3cX 150 0.25 0.087 0.149 0.087 205 265

3cX 185 0.2 0.087 0.12 0.087 240 305

3cX 240 0.15 0.087 0.0912 0.087 280 355

3cX 300 0.12 0.086 0.0739 0.086 315 400

3cX 400 0.09 0.086 0.0592 0.086 375 435

3cX 500 0.09 0.086 0.0592 0.086 425 520

3cX 630 0.09 0.086 0.0592 0.086 480 675

3.5X16 1.44 0.097 0.73 0.097 62 90

3.5X25 0.77 0.094 0.387 .0.094 70 90

3.5X35 0.53 0.09 0.268 0.09 86 110

3.5X50 0.38 0.09 0.193 0.09 105 135

3.5X70 0.3 0.087 0.153 0.087 130 165

3.5X95 0.2 0.087 0.099 0.087 155 200

3.5X120 0.15 0.087 0.075 0.087 180 230

3.5X150 0.12 0.086 0.06 0.086 205 265

3.5X185 0.09 0.086 0.047 0.086 240 305

3.5X240 0.08 0.085 0.046 0.085 280 355

3.5X300 0.08 0.085 0.046 0.085 315 400

3.5X400 0.08 0.084 0.045 0.084 375 435

3.5X500 0.08 0.084 0.045 0.084 425 520

3.5X630 0.08 0.084 0.045 0.084 480 675

4cX 1.5 21.72 0.126 14.5 0.126 13 17

4cX 2.5 14.52 0.119 8.87 0.119 18 24

4cX4 8.89 0.116 5.52 0.116 23 30

4cX 6 5.53 0.11 3.69 0.11 30 39

4cX 10 3.7 0.1 2.19 0.1 40 52

4cX16 2.29 0.097 1.38 0.097 51 66

4cX 25 1.44 0.097 0.87 0.097 70 90

4cX35 1.04 0.097 0.62 0.097 86 110

4cX 50 0.77 0.094 0.46 0.094 105 135

4cX70 0.53 0.09 0.32 0.09 130 165

4cX 95 0.38 0.9 0.23 0.09 155 200

4cX 120 0.3 0.087 0.18 0.087 180 230

4cX 150 0.25 0.087 0.14 0.087 205 265

4cX 185 0.2 0.087 0.12 0.087 240 305

4cX 240 0.15 0.087 0.091 0.087 280 355

4cX 300 0.12 0.086 0.073 0.086 315 400

4cX 400 0.09 0.086 0.059 0.086 375 435

4cX 500 0.09 0.086 0.059 0.086 425 520

4cX 630 0.09 0.086 0.059 0.086 480 675

3.8 / 6.6 KV(6.6 KV Earthed) AL/COPPER COND, XLPE INSULATED CABLES Aluminium Copper Current Capacity

Resi React Resi React Aluminium Cu

ohm/km ohm/km ohm/km ohm/km Amp Amp

1cX25 1.1 0.129 1.1 0.129 120 155

1cX35 1.1 0.129 1.1 0.129 145 185

1cX50 0.822 0.1293 0.822 0.1293 170 220

1cX70 0.568 0.1195 0.568 0.1195 215 275

1cX95 0.411 0.113 0.411 0.113 260 340

1cX120 0.325 0.1085 0.325 0.1085 305 390

1cX150 0.265 0.1062 0.265 0.1062 345 440

1cX185 0.211 0.1025 0.211 0.1025 395 510

1cX240 0.161 0.1011 0.161 0.1011 470 600

1cX300 0.13 0.0988 0.13 0.0988 540 680

1cX400 0.102 0.0959 0.102 0.0959 380 480

1cX 500 0.08 0.0936 0.08 0.0936 430 530

1cX 630 0.063 0.0919 0.063 0.0919 480 580

1cX800 0.0513 0.0895 0.0513 0.0895 530 630

1cX1000 0.0426 0.0875 0.0426 0.0875 580 670

3cX 25 1.1 0.134 1.1 0.134 105 135

3cX 35 1.1 0.134 1.1 0.134 125 165

3cX 50 0.822 0.1358 0.822 0.1358 150 195

3cX 70 0.568 0.1237 0.568 0.1237 190 240

3cX 95 0.411 0.1168 0.411 0.1168 230 295

3cX 120 0.325 0.1128 0.325 0.1128 260 335

3cX 150 0.265 0.1096 0.265 0.1096 295 380

3cX 185 0.211 0.1073 0.211 0.1073 335 430

3cX 240 0.161 0.1041 0.161 0.1041 395 500

3cX 300 0.13 0.1002 0.13 0.1002 450 570

3cX 400 0.102 0.0968 0.102 0.0968 520 650

6.6 /11 KV(6.6KV Un-Earthed/11KV Earthed) AL/COPPER COND, XLPE INSULATED CABLES Aluminium Copper Current Capacity

Resi React Resi React Aluminium Cu

ohm/km ohm/km ohm/km ohm/km Amp Amp

1cX25 1.1 0.134 1.1 0.134 120 155

1cX35 1.1 0.134 1.1 0.134 145 185

1cX50 0.822 0.1358 0.822 0.1358 170 220

Nominal Conductor

Area (Sq.mm)

Nominal Conductor

Area (Sq.mm)

1cX70 0.568 0.1237 0.568 0.1237 215 275

1cX95 0.411 0.1168 0.411 0.1168 260 340

1cX120 0.325 0.1128 0.325 0.1128 305 390

1cX150 0.265 0.1096 0.265 0.1096 345 440

1cX185 0.211 0.1073 0.211 0.1073 395 510

1cX240 0.161 0.1041 0.161 0.1041 470 600

1cX300 0.13 0.1002 0.13 0.1002 540 680

1cX400 0.102 0.0968 0.102 0.0968 630 790

1cX 500 0.08 0.0939 0.08 0.0939 730 910

1cX 630 0.063 0.0921 0.063 0.0921 840 1030

1cX800 0.0513 0.097 0.0513 0.097 960 1140

1cX1000 0.0426 0.0875 0.0426 0.0875 1070 1250

3cX 25 1.1 0.134 1.1 0.134 105 135

3cX 35 1.1 0.134 1.1 0.134 125 165

3cX 50 0.822 0.1358 0.822 0.1358 150 195

3cX 70 0.568 0.1237 0.568 0.1237 190 240

3cX 95 0.411 0.1168 0.411 0.1168 230 295

3cX 120 0.325 0.1128 0.325 0.1128 260 335

3cX 150 0.265 0.1096 0.265 0.1096 295 380

3cX 185 0.211 0.1073 0.211 0.1073 335 430

3cX 240 0.161 0.1041 0.161 0.1041 395 500

3cX 300 0.13 0.1002 0.13 0.1002 450 570

3cX 400 0.102 0.0968 0.102 0.0968 520 650

11 KV(11KV Un Earthed) AL/COPPER COND, XLPE INSULATED CABLES Aluminium Copper Current Capacity

Resi React Resi React Aluminium Cu

ohm/km ohm/km ohm/km ohm/km Amp Amp

1cX25 1.1 0.134 1.1 0.134 120 155

1cX35 1.1 0.134 1.1 0.134 145 185

1cX50 0.822 0.1358 0.822 0.1358 170 220

1cX70 0.568 0.1237 0.568 0.1237 215 275

1cX95 0.411 0.1168 0.411 0.1168 260 340

1cX120 0.325 0.1128 0.325 0.1128 305 390

1cX150 0.265 0.1096 0.265 0.1096 345 440

1cX185 0.211 0.1073 0.211 0.1073 395 510

1cX240 0.161 0.1041 0.161 0.1041 470 600

1cX300 0.13 0.1002 0.13 0.1002 540 680

1cX400 0.102 0.0968 0.102 0.0968 630 790

1cX 500 0.08 0.0939 0.08 0.0939 730 910

1cX 630 0.063 0.0921 0.063 0.0921 840 1030

1cX800 0.0513 0.097 0.0513 0.097 960 1140

1cX1000 0.0426 0.0875 0.0426 0.0875 1070 1250

3cX 25 1.1 0.134 1.1 0.134 105 135

3cX 35 1.1 0.134 1.1 0.134 125 165

3cX 50 0.822 0.1358 0.822 0.1358 150 195

3cX 70 0.568 0.1237 0.568 0.1237 190 240

3cX 95 0.411 0.1168 0.411 0.1168 230 295

3cX 120 0.325 0.1128 0.325 0.1128 260 335

3cX 150 0.265 0.1096 0.265 0.1096 295 380

3cX 185 0.211 0.1073 0.211 0.1073 335 430

3cX 240 0.161 0.1041 0.161 0.1041 395 500

3cX 300 0.13 0.1002 0.13 0.1002 450 570

3cX 400 0.102 0.0968 0.102 0.0968 520 650

Nominal Conductor

Area (Sq.mm)

1.1 KV XLPE InsulatedAluminium Copper Current Capacity

Resi React Resi React Aluminium Cu

ohm/km ohm/km ohm/km ohm/km Amp Amp

1cX4 1.555 0.102 1.555 0.102 — 45

1cX6 1.553 0.102 1.553 0.102 45 57

1cX10 1.553 0.102 1.553 0.102 61 77

1cX16 1.54 0.102 1.54 0.102 83 106

1cX25 1.54 0.102 0.93 0.102 115 145

1cX35 1.11 0.097 0.671 0.097 135 175

1cX50 0.82 0.092 0.495 0.092 170 215

1cX70 0.56 0.088 0.343 0.088 210 270

1cX95 0.41 0.085 0.247 0.085 255 330

1cX120 0.32 0.082 0.196 0.082 300 380

1cX150 0.265 0.082 0.159 0.082 342 430

1cX185 0.211 0.082 0.127 0.082 385 495

1cX240 0.162 0.079 0.0965 0.079 450 590

1cX300 0.13 0.078 0.0769 0.078 519 670

1cX400 0.1023 0.077 0.0608 0.077 605 780

1cX 500 0.0808 0.076 0.0468 0.076 700 900

Nominal Conductor

Area (Sq.mm)

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1cX 630 0.0648 0.075 0.0362 0.075 809 1020

1cX800 0.053 0.075 0.0283 0.075 935 1140

1cX1000 0.0444 0.068 0.0225 0.068 1065 1250

2cX1.5 — — — — — —

2cX2.5 — — — — — —

2cX4 1.555 0.097 1.555 0.097 30 39

2cX 6 1.553 0.097 1.553 0.097 40 50

2cX10 1.553 0.085 1.553 0.085 53 67

2cX16 1.54 0.08 1.54 0.08 70 85

2cX25 1.54 0.08 0.93 0.08 99 125

2cX35 1.11 0.08 0.671 0.08 117 155

2cX50 0.082 0.078 0.495 0.078 140 190

2cX70 0.57 0.077 0.343 0.077 176 235

2cX95 0.41 0.074 0.247 0.074 221 290

2cX120 0.33 0.072 0.196 0.072 258 330

2cX150 0.27 0.072 0.159 0.072 294 375

2cX185 0.21 0.072 0.127 0.072 339 435

2cX240 0.16 0.072 0.0965 0.072 402 510

2cX300 0.13 0.071 0.0769 0.071 461 590

2cX400 0.1 0.07 0.0602 0.07 542 670

2cX500 0.1 0.07 0.0602 0.07 624 750

2cX630 0.1 0.07 0.0602 0.07 723 875

3cX1.5 — — — — — —

3cX2.5 — — — — — —

3cX4 1.581 0.097 1.581 0.097 30 39

3cX 6 1.57 0.097 1.57 0.097 40 50

3cX 10 1.55 0.08 1.55 0.08 53 67

3cX 16 1.557 0.08 1.557 0.08 70 85

3cX 25 1.54 0.08 0.93 0.08 99 125

3cX 35 1.11 0.08 0.671 0.08 117 155

3cX 50 0.82 0.78 0.495 0.078 140 190

3cX 70 0.57 0.077 0.343 0.077 176 235

3cX 95 0.41 0.074 0.247 0.074 221 290

3cX 120 0.33 0.072 0.196 0.072 258 330

3cX 150 0.27 0.072 0.159 0.072 294 375

3cX 185 0.21 0.072 0.127 0.072 339 435

3cX 240 0.16 0.072 0.0965 0.072 402 510

3cX 300 0.13 0.071 0.0769 0.071 461 590

3cX 400 0.1 0.07 0.0602 0.07 542 670

3cX 500 0.1 0.07 0.0602 0.07 624 750

3cX 630 0.1 0.07 0.0602 0.07 723 875

3.5X16 — — — — — —

3.5X25 1.54 0.08 0.93 0.08 99 125

3.5X35 1.11 0.08 0.671 0.08 117 155

3.5X50 0.82 0.078 0.0495 0.078 140 190

3.5X70 0.57 0.077 0.343 0.077 176 235

3.5X95 0.41 0.074 0.247 0.074 221 290

3.5X120 0.33 0.072 0.196 0.072 258 330

3.5X150 0.27 0.072 0.159 0.072 294 375

3.5X185 0.21 0.072 0.127 0.072 339 435

3.5X240 0.16 0.072 0.0965 0.072 402 510

3.5X300 0.13 0.071 0.0769 0.071 461 590

3.5X400 0.1 0.07 0.0602 0.07 542 670

3.5X500 0.1 0.07 0.0602 0.07 624 750

3.5X630 0.1 0.07 0.0602 0.07 723 875

4cX 1.5 — — — — — —

4cX 2.5 — — — — — —

4cX4 5.53 0.11 3.69 0.11 30 39

4cX 6 3.7 0.1 2.19 0.1 40 50

4cX 10 2.29 0.097 1.38 0.097 53 67

4cX16 2.45 0.08 1.47 0.08 70 85

4cX 25 1.54 0.08 0.93 0.08 99 125

4cX35 1.11 0.08 0.671 0.08 117 155

4cX 50 0.082 0.078 0.495 0.078 140 190

4cX70 0.57 0.077 0.343 0.077 176 235

4cX 95 0.41 0.074 0.247 0.074 221 290

4cX 120 0.33 0.072 0.196 0.072 258 330

4cX 150 0.27 0.072 0.159 0.072 294 375

4cX 185 0.21 0.072 0.127 0.072 339 435

4cX 240 0.16 0.072 0.0965 0.072 402 510

4cX 300 0.13 0.071 0.0769 0.071 461 590

4cX 400 0.1 0.07 0.0602 0.07 542 670

4cX 500 0.1 0.07 0.0602 0.07 624 750

4cX 630 0.1 0.07 0.0602 0.07 723 875

MCB DetailLoad Current (Amp) Size of MCCB/ELCB (Amp)

0.0 61.0 62.0 64.0 66.0 10

10.0 1616.0 2020.0 2525.0 3232.0 4040.0 4545.0 5050.0 6363.0 8080.0 100

100.0 125125.0 225225.0 600600.0 800800.0 1600

1600.0 20002000.0 30003000.0 32003200.0 40004000.0 50005000.0 60006000.0 6000

Name of Feeder

Feeder.IFeeder.IIFeeder.IIIFeeder.IVFeeder.VFeeder.VIFeeder.VIIFeeder.VIIIFeeder.IXFeeder.X

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