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 ,[email protected]
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 ,[email protected]
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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