Short Circuit Calculation ex

N.B Calculation is made on Infinitue Bus Method Fault Current Calculation (Infinitue Bus Method) Jignesh.Parmar, jiguparmar@yah www.electricalnotes.wordpress Fault Current at Transformer Primary Side (Enter This Value if You know otherwise leave blank) Fault Current At Transformer Transformer Kva Secondary Voltage of Transformer (Line-Line) Secondary Voltage of Transformer (Line-Neutral) Transformer Impedance (Zt) Transformer Secondary Full Load Current I (Line-Line) Transformer Secondary Full Load Current I (Line-Neutral) KVA Short Circuit At Primary Side Source Impedance (Zu) Total Impedance (Z =Zu+Zt) Short Circuit Current RMS Symmetrical Fault Current At Transformer Secondary ( Isc(L-L)=I (L-L)/Total Impedance) Fault Current At Transformer Secondary ( Isc(L-N)=I (L-N)/Total Impedance) 3 433 250 6 4 6 0.0000 0.0600 67 67 100 Fault Current At Main Panel Cable Length from Transformer to Main Panel Type of Cable No of Conductor/Phase Size of Phase Conductor Size of Neutral Conductor Type of Race Way Phase Conductor Constant (C1) Neutral Conductor Constant (C2) F1(L-L) [F(L-L)=(1.732 X Length X Isc)/(C1 X No of Conductor X Volt)] F2(L-N) [F(L-L)=(1.732 X Length X Isc)/(C2 X No of Conductor X Volt)] M1(L-L) [M=(1/(1+F1)] M2(L-N) [M=(1/(1+F2)] Fault Current at Main Panel Disconnection (L-L) [Isc X M1] Fault Current at Main Panel Disconnection (L-N) [Isc X M2] 50 Cu 1 120 mm2 120 mm2 Non-Metalic 17483 17483 0.001 0.002 0.999 0.998 67 100 Fault Current At Sub Panel Cable Length from Main Panel to Sub Panel Type of Cable No of Conductor/Phase Size of Phase Conductor Size of Neutral Conductor Type of Race Way Phase Conductor Constant (C1) Neutral Conductor Constant (C2) F1(L-L) [F(L-L)=(1.732 X Length X Isc)/(C1 X No of Conductor X Volt)] F2(L-N) [F(L-L)=(1.732 X Length X Isc)/(C2 X No of Conductor X Volt)] M1(L-L) [M=(1/(1+F1)] M2(L-N) [M=(1/(1+F2)] Fault Current at Sub Panel Disconnection (L-L) [Isc X M1] Fault Current at Sub Panel Disconnection (L-N) [Isc X M2] 20 Cu 1 30 mm2 127 mm2 Non-Metalic 4833 19779 0.001 0.000 0.999 1.000 67 100 Fault Current At Distribution Board Cable Length from Sub Panel to Distribution Board Type of Cable No of Conductor/Phase Size of Phase Conductor Size of Neutral Conductor Type of Race Way Phase Conductor Constant (C1) Neutral Conductor Constant (C2) F1(L-L) [F(L-L)=(1.732 X Length X Isc)/(C1 X No of Conductor X Volt)] F2(L-N) [F(L-L)=(1.732 X Length X Isc)/(C2 X No of Conductor X Volt)] M1(L-L) [M=(1/(1+F1)] M2(L-N) [M=(1/(1+F2)] Fault Current at Distribution Board Disconnection (L-L) [Isc X M1] 50 Cu 1 127 mm2 127 mm2 Non-Metalic 18594 18594 0.001 0.001 0.999 0.999 66 Fault Current at Distribution Board Disconnection (L-N) [Isc X M2] 100 .Parmar, [email protected], electricalnotes.wordpress.com Amp Kva Volt Volt % Amp Amp Amp Amp Amp Meter 3 Core Cable Amp Amp Meter 3 Core Cable Amp Amp Meter 1 Core Cable Amp Fault Current Calculation Base KVA Method Alu Cu Yes No 1 Core Cable 3 Core Cable Non-Metalic Metalic Amp . . . . . . 6 KV-Earthed) 100 1.14 CU Meter Ω/Km Ω/Km Ω Ω Ω Ω Ω MVA Kamp 3cX 95 LT XLPE (Up to 1.T Side Diesel / Gas Generator 1cX35 Fault Level at Transformer Side Transformer Rating Transformer Impedance Size of Cable from H.u (D) (Up to Transformer Primary) Fault Level at Transformer Primary Side % Reactance at Base KVA Z P.1 KV) 100 0.T Sub Station R (D.119 25.u (D) Total Z p.206 0.u (C) Total Z p.84 MVA % CU Meter Ω/Km Ω/Km 3cX 400 Ω Ω Ω Ω Ω MVA % Ω Ω MVA Kamp Fault Level at Main LT Panel Side Size of Cable from Transformer To Main LT Panel Length of Cable from Transformer To Main LT Panel R (Main LT) X (Main LT) R (Main LT) X (Main LT) Z (D) Z p.u (Z p.008 Ω HT XLPE ( 6.247 0.G) Z P.184 8.025 0.050 CU Meter Ω/Km 3.014 0.19 CU Meter Ω/Km Ω/Km Ω Ω Ω Ω MVA Fault Level at HT Sub Station Side P.u(A) + Z p.074 0.u(B) Fault Level at H.U Impedance up to T/C Secondary Fault Level at Transformer Secondary Side Fault Current at Transformer Secondary Fault Level at LT Sub Station Side 1.110 0.u (D) (Up to LT Main Panel) Fault Level at Main LT Panel Fault Current at Main LT Panel LT XLPE (Up to 1.U Reactance at Incoming of H.102 0.T beaker and Transformer Primary side) Base KV (For H.007 0.000 0.T Sub Station Length of Cable from Generator To H.026 0.12 6.326 4.T Breaker [Z p.T Breaker To Transformer R (T/C) X (T/C) R (T/C) X (T/C) Z(T/C) Z p.119 25.T beaker and Transformer Primary side) Base KV (For Transformer Secondary.433 MVA MVA KV KV 0.T Breaker To Transformer Length of Cable from H.D.LT Panel.129 0.G) R (D.U (B) Total Z p.U (T/C) Total P.100 0.010 0.097 0.500 0.1 KV) 100 0.G) X (D.61 6.5 6.065 0.13 10.5 HT XLPE ( 11 KV-Un Earthed) 100 0.G) X (D.013 0.5X50 Fault Level at LT Sub Panel Side Size of Cable from Main LT Panel To LT Sub Panel Length of Cable from Main LT Panel To LT Sub Panel R (LT Sub) .B) 360 3 11 0.111 0.010 0.Fault Current Calculation (Base KVA Method) Calculating Fault Current From Power Generation Infinitue From Power Distribution T/C Fault Level at Incoming Site Base MVA (For H.u(A) ] Fault Level at Diesel / Gas Generator Size of Cable from Generator To H. 1 KV) 100 4.000 0.49 CU Meter Ω/Km Ω/Km Ω Ω Ω Ω Ω MVA Kamp X (LT Sub) R (LT Sub) X (LT Sub) Z (E) Z p.122 0.u (D) (Up to LT Sub Panel) Fault Level at LT Sub Panel Fault Current at LT Sub Panel Fault Level at Distribution Board Side Size of Cable from LT Sub Panel To Distribution Board Length of Cable from LT Sub Panel To Distribution Board R (Distribution Board) X (Distribution Board) R (Distribution Board) X (Distribution Board) R (Distribution Board) Z p.005 0.009 0.078 0.008 0.u (F) Total Z p.u (E) Total Z p.000 0.0.950 0.074 0.495 0.495 3.75 5.960 4.400 3.36 0.u (F) (Up to Distribution Board) Fault Level at Distribution Board Fault Current at Distribution Board 1cX4 .00 Ω/Km Ω Ω Ω Ω Ω MVA Kamp PVC Flexible (Up to 1. . 12 8.electricalnotes.com.13 10.14 3.61 6.Infinitue Method Jignesh.36 0.T Side Diesel / Gas Generator Fault Level at Transformer Primary Side Fault Level at Transformer Secondary Side Fault Current at Transformer Secondary Fault Level at Main LT Panel Fault Current at Main LT Panel Fault Level at LT Sub Panel 360 25.49 MVA Kamp N.B: Calculation is based on Base KVA Method 1 Runs Ω/Km Ω/Km 1 Runs Ω/Km Ω/Km 1 Runs Ω/Km MVA MVA MVA MVA Kamp MVA Kamp MVA .Parmar. www.com Calculation Results 1 Runs Fault Level at Incoming Site Fault Level at H.wordpress.84 [email protected] 25.75 Fault Current at LT Sub Panel 5.00 Kamp Fault Level at Distribution Board Fault Current at Distribution Board 0. Ω/Km 1 Runs Ω/Km Ω/Km . . . . . 75 3cX1 3cX1.75 2cX1 2cX1.75 1cX1 1cX1.5 2cX4 2cX 6 2cX10 2cX16 2cX25 2cX35 2cX50 2cX70 2cX95 2cX120 2cX150 2cX185 2cX240 2cX300 2cX400 2cX500 2cX630 3cX1.5 3cX2.5 3cX4 1cX25 1cX35 1cX50 1cX70 1cX95 1cX120 2cX0.5 2cX2.5 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 .5 2cX4 3cX0.1 KV) LT XLPE (Up to 1.5 1cX0.1 KV) LT PVC (Up to 1.5 2cX2.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) AL CU 1 1cX25 1cX35 1cX50 1cX70 1cX95 1cX120 1cX150 1cX185 1cX 95 1cX120 1cX150 1cX185 1cX240 1cX300 1cX400 1cX 500 1cX4 1cX6 1cX10 1cX16 1cX25 1cX35 1cX50 1cX70 1cX0.1 KV) HT XLPE ( 6.5 1cX2.5 3cX2.5 2cX0.5 3cX0.5 1cX4 1cX6 1cX10 1cX240 1cX 630 1cX95 1cX16 1cX300 1cX400 1cX 500 1cX 630 1cX800 1cX1000 3cX 25 3cX 35 3cX 50 3cX 70 3cX 95 3cX 120 3cX 150 3cX 185 3cX 240 3cX 300 3cX 400 1cX800 1cX1000 1cX120 1cX150 1cX185 1cX240 1cX300 1cX400 1cX 500 1cX 630 1cX800 1cX1000 2cX1.PVC Flexible (Up to 1. 5X240 3.5X150 3.5X630 4cX 1.5 4cX 2.3cX 630 3.5X400 3.5X500 3.5X300 3.5X185 3.5X50 3.5X35 3.5X70 3.5X16 3.5X120 3.5X95 3.5X25 3.5 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 . 5 mm2 4 mm2 6 mm2 10 mm2 16 mm2 25 mm2 30 mm2 35 mm2 50 mm2 55 mm2 70 mm2 95 mm2 120 mm2 127 mm2 152 mm2 177 mm2 203 mm2 253 mm2 304 mm2 355 mm2 507 mm2 14 AWG 12 AWG 10 AWG 8 AWG 6 AWG 4 AWG 3 AWG 2 AWG 1 AWG O AWG OO AWG OOO AWG OOOO AWG 250 kcmil 300 kcmil 350 kcmil 400 kcmil 500 kcmil 600 kcmil 750 kcmil 1000 kcmil 120 mm2 120 mm2 30 mm2 127 mm2 127 mm2 127 mm2 "C" For Copper conductor.Cu Non-Metalic 3 Core Cable Cu Non-Metalic 3 Core Cable Cu Non-Metalic 1 Core Cable mm2 AWG/Kcmill 2. 3 Single Conductor 3 Conductor Cable 600V 600V Steel Nonmagnetic Steel Nonmagnetic 389 389 389 389 617 617 617 617 981 982 982 982 1557 1559 1559 1560 2425 2430 2431 2433 3806 3826 3830 3838 4774 4811 4820 4833 5907 6044 5989 6087 7293 7493 7454 7579 8925 9317 9210 9473 10755 11424 11245 11703 12844 13923 13656 14410 15082 16673 16392 17483 16483 18594 18311 19779 18177 20868 20617 22525 19704 22737 22646 24904 20566 24297 24253 26916 22185 26706 26980 30096 22965 28033 28752 32154 24137 29735 31051 34605 25278 31491 33864 37197 15082 15082 0 0 4774 16483 0 0 16483 16483 0 0 16673 16673 16392 16392 0 0 17483 17483 17483 17483 4811 18594 4820 18311 0 0 4833 19779 4833 19779 0 0 0 0 18594 18594 18594 18594 18311 18311 0 0 19779 19779 0 0 . 3 Single Conductor 3 Conductor Cable 600V 600V Steel Nonmagnetic Steel Nonmagnetic 237 237 237 237 376 376 376 376 599 599 599 599 951 952 952 952 1481 1482 1482 1482 2346 2350 2351 2353 2952 2961 2963 2966 3713 3730 3734 3740 4645 4678 4686 4699 5777 5838 5852 5876 7187 7301 7327 7373 8826 9110 9077 9243 10741 11174 11185 11409 12122 12862 12797 13236 13910 14923 14917 15495 15484 16813 16795 17635 16671 18506 18462 19588 18756 21391 21395 23018 20093 23451 23633 25708 21766 25976 26432 29036 23478 28779 29865 32938 10741 10741 0 0 11174 11174 0 0 11185 11185 0 0 11409 11409 0 0 17483 17483 2952 12122 0 0 2961 12862 0 0 2963 12797 0 0 2966 13236 0 0 4833 19779 12122 12122 0 0 12862 12862 0 0 12797 12797 0 0 13236 13236 0 0 18594 18594 .mm2 AWG/Kcmill 2.5 mm2 4 mm2 6 mm2 10 mm2 16 mm2 25 mm2 30 mm2 35 mm2 50 mm2 55 mm2 70 mm2 95 mm2 120 mm2 127 mm2 152 mm2 177 mm2 203 mm2 253 mm2 304 mm2 355 mm2 507 mm2 14 AWG 12 AWG 10 AWG 8 AWG 6 AWG 4 AWG 3 AWG 2 AWG 1 AWG O AWG OO AWG OOO AWG OOOO AWG 250 kcmil 300 kcmil 350 kcmil 400 kcmil 500 kcmil 600 kcmil 750 kcmil 1000 kcmil "C" For Allu conductor. 157 0.157 0.95 0 0 0 0 0 0 0 0 0 0 0 0 0 0 254 300 4 7 11 15 19 26 4 7 11 15 19 26 254 300 4 7 11 15 19 26 4 7 11 15 19 26 3.5 2cX4 3cX0.1 KV) HT XLPE ( 6.1 KV) 3cX 95 .271 0.214 0.78 0.6 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) 3cX 400 CU 2 PVC Flexible (Up to 1.98 4.057 0.214 0.554 0.629 4.206 0.98 4.214 0.371 HT XLPE ( 6.91 0 46 Copper Current Carrying Capacity (Amp) 4 7 11 15 19 26 35 46 Copper Current Carrying Capacity (Amp) 0.1 KV) LT XLPE (Up to 1.057 0.657 1cX16 1cX25 1cX35 1cX50 1cX70 1.3 7.272 0 0 0 0 0 62 80 102 138 214 62 80 102 138 214 0.5 1cX2.98 0 19 4.1 KV) LT PVC (Up to 1.457 1.371 0.5 3cX2.271 0.3 0 35 1.371 0.057 1cX95 1cX120 2cX0.6 KV-Earthed) 1cX35 CU 2 PVC Flexible (Up to 1.286 0.143 1.100 0.1 KV) LT XLPE (Up to 1.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) LT XLPE (Up to 1.5 3cX4 0.75 1cX1 1cX1.100 0.3 7.5 2cX0.95 0 26 3.21 0.971 3.500 0.157 0.3 0 15 7.Nominal Conductor Area (Sq.mm) 1cX0.5 1cX4 1cX6 1cX10 PVC Flexible Maximum Maximum Aluminium Conductor Conductor Current Resistance Reactance at Carrying at 20°C 20°C Capacity (Amp) (ohm/km) 39 0 4 26 0 7 19.057 0.5 1cX0.1 KV) HT XLPE ( 6.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) HT XLPE ( 6.386 0.161 39 26 19.5 3cX0.5 13.5 0 11 13.75 3cX1 3cX1.271 0.5 13.100 0.1 KV) LT PVC (Up to 1.886 1.5 2cX2.95 39 26 19.75 2cX1 2cX1. 1 KV) HT XLPE ( 6.1 KV) HT XLPE ( 6.1 KV) LT PVC (Up to 1.1 KV) PVC Flexible (Up to 1.5X50 CU 2 PVC Flexible (Up to 1.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) .1 KV) 1cX4 CU 2 PVC Flexible (Up to 1.1 KV) LT XLPE (Up to 1.CU 2 PVC Flexible (Up to 1.1 KV) LT XLPE (Up to 1.1 KV) 3.1 KV) LT PVC (Up to 1.1 KV) LT XLPE (Up to 1.1 KV) HT XLPE ( 6.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) LT XLPE (Up to 1.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) LT XLPE (Up to 1.1 KV) LT PVC (Up to 1.1 KV) LT XLPE (Up to 1. 097 1.29 0.52 3.11 3.11 0.1 2.69 2.9 0.116 0.149 0.087 0.12 0.086 0.082 21.09 0.126 0.87 0.087 4 5 6 Copper Resi ohm/km 5.53 0.38 0.119 8.094 0.087 0.092 0.09 0.mm) 1cX4 1cX6 1cX10 1cX16 1cX25 1cX35 1cX50 1cX70 1cX95 1cX120 1cX150 1cX185 1cX240 1cX300 1cX400 1cX 500 1cX 630 1cX800 1cX1000 2cX1.097 0.69 2.097 0.097 0.11 0.09 0.087 0.04 0.086 0.126 14.12 0.12 1.094 0.321 0.101 0.19 1.097 0.082 0.11 0.119 0.72 0.087 0.7 0.52 0.087 0.086 0.088 0.77 0.088 0.148 3.3 0.53 0.116 5.321 0.9 0.53 0.69 2.09 0.031 0.0158 0.148 0.463 0.116 5.PVC Flexible (Up to 1.097 0.25 0.097 1.087 Ground Amp — 39 51 66 86 100 120 140 175 195 220 240 270 295 325 345 390 450 500 18 16 32 40 55 70 90 110 135 160 190 210 240 275 320 355 385 425 465 16 21 28 35 46 60 76 92 110 135 165 185 210 7 1.088 0.29 0.088 0.38 0.89 0.094 0.126 0.086 0.184 0.2 0.101 0.087 0.073 0.09 0.5 2cX2.086 0.38 0.04 0.77 0.094 0.29 0.086 21.044 0.091 0.092 0.1 KV PVC Insulated Aluminum Duct Amp — 37 51 65 84 100 115 135 155 170 190 210 225 245 275 295 320 380 415 16 21 27 34 45 58 76 92 115 140 170 190 210 240 275 305 345 380 415 14 18 23 30 39 50 63 77 95 115 140 155 175 .138 2.44 0.72 0.096 0.094 0.5 3cX4 3cX 6 3cX 10 3cX 16 3cX 25 3cX 35 3cX 50 3cX 70 3cX 95 3cX 120 3cX 150 3 Aluminium Resi React ohm/km ohm/km 8.463 0.09 0.04 0.116 0.096 0.5 8.44 0.52 0.097 1.083 0.12 0.8 0.5 8.627 0.12 0.027 14.15 0.119 0.046 0.103 0.086 0.627 0.11 3.231 0.097 0.321 0.086 0.1 2.09 0.184 0.086 0.38 0.059 0.2 0.037 0.126 14.114 0.0349 0.09 0.38 0.5 2cX4 2cX 6 2cX10 2cX16 2cX25 2cX35 2cX50 2cX70 2cX95 2cX120 2cX150 2cX185 2cX240 2cX300 2cX400 2cX500 2cX630 3cX1.15 0.25 0.87 5.059 0.094 0.087 0.52 3.059 0.77 0.158 5.87 0.463 0.25 0.3 0.097 1.52 3.87 5.44 0.1 KV) 2 Nominal Conductor Area (Sq.5 3cX2.87 0.09 0.12 0.19 1.7 0.53 0.627 0.083 0.231 0.09 0.53 0.53 0.086 0.3 0.7 0.094 0.19 1.087 0.097 0.149 0.1 0.1 0.087 0.149 React ohm/km 0.11 0.09 0.087 0.097 0.231 0.091 0.119 8.128 1.087 0.087 0.184 0.0563 0.103 0.059 14.89 0.138 0.0726 0.128 0.114 0.38 0.074 0. 094 0.087 0.113 0.153 0.1011 0.1062 0.3cX 185 3cX 240 3cX 300 3cX 400 3cX 500 3cX 630 3.087 0.822 0.08 0.063 0.059 0.8 / 6.09 0.091 0.568 0.087 0.097 0.119 0.09 0.1 0.87 0.12 0.087 0.7 2.387 0.411 0.113 0.822 0.087 0.134 0.1085 0.09 0.2 0.087 0.097 0.086 0.129 1.08 0.059 0.23 0.5 4cX 2.822 0.086 0.126 0.53 0.211 0.0919 0.5X120 3.046 0.094 0.0988 0.097 0.5X300 3.06 0.1 0.097 0.38 0.1 1.12 0.265 0.5X500 3.046 0.568 0.086 0.087 0.38 0.059 0.3 0.0959 0.087 0.0513 0.5 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 Nominal Conductor Area (Sq.086 Copper Resi ohm/km 1.134 0.116 0.5X25 3.25 0.76 620 0.086 0.29 1.102 0.09 0.09 0.161 0.2 0.13 0.1168 0.045 0.047 0.1 1.084 0.19 1.086 0.568 0.094 0.1168 235 275 305 335 370 405 70 76 92 110 135 165 185 210 235 275 305 335 370 405 16 21 28 35 46 60 76 92 110 135 165 185 210 235 275 305 335 370 405 200 235 260 290 320 350 65 63 77 95 115 140 155 175 200 235 260 290 320 350 14 18 23 30 39 50 63 77 95 115 140 155 175 200 235 260 290 320 350 3.69 2.09 0.1195 0.0895 0.0592 0.087 0.08 0.086 0.08 0.5X240 3.77 0.09 0.09 1.6 KV Earthed) AL/COPPER COND.11 0.193 0.087 0.44 1.1025 0.087 0.0919 0.099 0.82 680 95 82 115 97 130 115 160 140 190 165 .1011 0.09 0.15 0.18 0.126 0.0912 0.087 0.325 0.04 0.5X16 3.1 0.09 0.084 0.086 0.1 0.568 0. XLPE IN Aluminum Ground Duct Amp Amp 100 90 120 105 140 125 175 155 205 180 235 205 260 230 295 260 340 300 385 335 0.211 0.085 0.15 0.325 0.1293 0.045 0.086 Aluminium Resi React ohm/km ohm/km 1.063 0.6 KV(6.086 0.46 0.102 0.89 5.1085 0.129 0.085 0.08 0.mm) 1cX25 1cX35 1cX50 1cX70 1cX95 1cX120 1cX150 1cX185 1cX240 1cX300 1cX400 1cX 500 1cX 630 1cX800 1cX1000 3cX 25 3cX 35 3cX 50 3cX 70 3cX 95 0.77 0.086 0.0936 0.9 0.87 5.075 0.129 0.5X35 3.086 0.1358 0.134 0.09 0.67 560 0.073 0.129 0.3 0.0959 0.097 0.0426 1.60 495 0.38 0.57 440 0.62 0.085 0.087 0.1 0.1293 0.2 0.0875 0.086 0.1 0.12 0.084 0.5X150 3.087 0.5X95 3.1195 0.5 8.5X185 3.0936 0.085 0.086 0.086 0.087 0.086 0.411 0.087 0.12 0.1062 0.5X50 3.086 0.72 14.411 0.12 0.1237 0.086 0.087 0.268 0.0739 0.0875 1.53 3.045 14.0988 0.1358 0.0.084 0.5X70 3.08 0.32 0.0592 0.52 3.09 0.5X400 3.411 React ohm/km 0.15 0.265 0.134 1.822 0.094 0.09 0.086 0.1 0.1025 0.1 0.0426 0.53 0.116 0.73 0.1237 0.097 0.0895 0.0592 0.52 8.097 .084 0.14 0.086 0.5X630 4cX 1.09 0.097 0.11 0.119 0.161 0.087 0.44 0.084 0.0513 0.08 21.13 0. 3cX 120 3cX 150 3cX 185 3cX 240 3cX 300 3cX 400 Nominal Conductor Area (Sq.134 0.1237 0.325 0.0921 0.1358 0.134 0.0939 0.1237 0.08 0.1002 0.1237 0.134 0.568 0.0426 0.1128 0.1128 0.1 0.1002 0.265 0.568 0.211 0.134 0.6KV Un-Earthed/11KV Earthed) AL/COPPER COND.1096 0.211 0.0921 560 480 0.102 0.1002 0.13 0.0939 495 430 0.13 0.265 0.0968 Copper Resi ohm/km 1.1 0.1096 0.822 0.0968 400 350 Copper Resi ohm/km 1.102 0.063 0.211 0.1002 355 310 0.102 190 210 240 275 310 350 6.161 0.325 0.134 120 105 0.13 0.13 0.822 0.13 0.1 0.1128 0.0921 0.0968 0.0875 680 580 0.1 0.1096 0.325 0.1358 0.1358 0.1041 315 275 0.1237 0.08 0.1 0.0875 1.1 0.1073 0.1041 0.1041 0.568 0.325 0.134 95 82 0.0513 0.211 0.1073 0.161 0.13 0.102 0.325 0.265 0.1 1.411 0.102 0.1002 0.13 0.1168 0.1358 0.1 0.568 0.411 0.097 620 530 0. XLPE INS Aluminum Ground Duct Amp Amp 100 90 120 105 140 125 175 155 205 180 235 205 260 230 295 260 340 300 385 335 440 380 495 430 560 480 620 530 680 580 95 82 115 97 130 115 160 140 .161 0.1002 0.1096 0.1128 0.08 0.822 0.1168 190 165 0.1041 0.6 /11 KV(6.0921 0.1168 0.1096 245 210 0.1073 0.1128 220 190 0.211 0.1041 0.161 0.211 0.0968 Aluminium Resi React ohm/km ohm/km 1.097 0.102 0.411 0.161 0.1041 340 300 0.1073 0.134 0.1 0.1168 205 180 0.0513 0.325 0.1073 295 260 0.0968 0.211 0.0513 0.097 0.063 0.1358 0.568 0.1237 160 140 0.411 0. Aluminum React Ground Duct ohm/km Amp Amp 0.1041 0.13 0.0426 1.0968 440 380 0.1096 0.568 0.0968 0.0875 0.0939 0.1 1.1 1.1128 0.568 0.063 0.134 115 97 0.1168 0.1128 235 205 0.1073 0.568 220 245 275 315 355 400 React ohm/km 0.0513 0.1 0.325 0.mm) 1cX25 1cX35 1cX50 1cX70 1cX95 1cX120 1cX150 1cX185 1cX240 1cX300 1cX400 1cX 500 1cX 630 1cX800 1cX1000 3cX 25 3cX 35 3cX 50 3cX 70 3cX 95 3cX 120 3cX 150 3cX 185 3cX 240 3cX 300 3cX 400 Nominal Conductor Area (Sq.265 0.265 0.1 0.097 0.411 0.822 0.1237 175 155 0.822 0.822 0.325 0.1 0.134 1.134 100 90 0.265 0.265 0.1041 0.211 0.1096 0.063 0.134 0.1096 260 230 0.102 0.102 0.mm) 1cX25 1cX35 1cX50 1cX70 1cX95 1cX120 1cX150 1cX185 1cX240 1cX300 1cX400 1cX 500 1cX 630 1cX800 1cX1000 3cX 25 3cX 35 3cX 50 3cX 70 0.822 0.1358 0.822 0.161 0.1168 0.0968 Aluminium Resi React ohm/km ohm/km 1.134 1.08 0.161 0.0426 1.134 1.134 0.1237 0.134 1.1 1.0939 0.1073 0.0426 0.1358 140 125 0.1 0.1073 275 240 0.134 0.411 0.161 0.1237 11 KV(11KV Un Earthed) AL/COPPER COND.1358 130 115 0.1002 0.1128 0.1002 385 335 0.0875 1.265 0. 2 0.102 0.1 0.778 0.1096 0.215 0.325 0.1168 0.1002 0.19 0.265 0.161 0.1096 0.183 0.325 0.265 0.3cX 95 3cX 120 3cX 150 3cX 185 3cX 240 3cX 300 3cX 400 Nominal Conductor Area (Sq.411 0.183 0.0605 0.0367 0.102 0.1128 0.181 0.0469 0.183 0.217 0.206 0.253 0.164 0.1041 0.183 0.211 0.125 0. XLPE INS Aluminum Ground Duct Amp Amp 195 240 220 280 240 335 275 380 320 450 360 510 410 595 460 690 525 800 590 910 650 1010 .218 0.1073 0.0968 Aluminium Resi React ohm/km ohm/km 0.32 0.1073 0.219 0.13 0.161 0.mm) 1cX 95 1cX120 1cX150 1cX185 1cX240 1cX300 1cX400 1cX 500 1cX 630 1cX800 1cX1000 0.411 0.1128 0.1041 0.13 0.1002 0.211 0.1168 0.0291 0.0968 Copper Resi ohm/km React ohm/km 190 220 245 275 315 355 400 165 190 210 240 275 310 350 66 KV(66 KV Un Earthed) AL/COPPER COND. 1 0 0 0 React 0 0 0 0.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) AL CU Rsi 0 0 0 1.102 0 React 0 0 0 0 0 0.C Amp 0 0 0 0 0 500 0 0 0 0 0 0 57.1 KV) LT PVC (Up to 1.20 0 57.0968 0 Amp 0 0 0 0 0 0 0 0.C Amp 0 0 0 155 0 0 0 0 0 0 5.129 0 0 0 Amp 0 0 0 0 0 0 0 1.0968 500 AL S.129 155 Rsi 0 0 0 0 0 0.20 .1 KV) HT XLPE ( 6.1 FALSE 0.00 0 0 0 5.1 KV) LT XLPE (Up to 1.102 0.00 CL S.PVC Flexible (Up to 1. 371428571 0 0 0 0 0 0 .0495 0 0 0 0 React 0 0 0.59 0 0 0 0 13.1 KV) HT XLPE ( 6.078 170 S.1 KV) HT XLPE ( 6.C Amp 0 0 250 0 0 0 0 0 0 13.1 KV) HT XLPE ( 6.074 0 0 0 0 Amp 0 0 0 0 0 0 0 0.1 KV) LT PVC (Up to 1.15 PVC Flexible (Up to 1.247 0.C Amp 0 0 170 0 0 0 0 0 0 7.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) AL CL Rsi 0 0 0.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) AL Rsi 4.1 KV) LT XLPE (Up to 1.0495 0.95 0 0 0 0 0 0 React 0 0 0 0 0 0 0 CU Amp 26 0 0 0 0 0 0 S.1 KV) LT PVC (Up to 1.074 250 S.C Amp 26 0 0 0 0 0 0 0.PVC Flexible (Up to 1.1 KV) LT XLPE (Up to 1.1 KV) LT XLPE (Up to 1.1 KV) LT PVC (Up to 1.247 0 0 0 0 React 0 0 0.6 KV-Earthed) HT XLPE ( 11 KV-Earthed) HT XLPE ( 11 KV-Un Earthed) HT XLPE ( 66 KV-Earthed) AL CL Rsi 0 0 0.59 PVC Flexible (Up to 1.15 0 0 0 0 7.078 0 0 0 0 Amp 0 0 0 0 0 0 0 0. 03 5.557 0.90 0.57 0.320 7.500 72.08 1.162 0.077 0.20 22.456 0.54 0.900 2.456 0.30 34.456 0.00 47.102 1.304 0.4 0.555 0.500 46.085 1.690 1.27 0.085 0.900 2.220 1.54 0.078 0.760 1.30 27.40 14.0648 0.80 17.220 1.320 7.102 1.08 1.80 76.21 0.3 0.211 0.078 0.460 0.56 0.760 1.553 0.30 21.082 0.3 0.150 1.079 0.068 — — — — 1.88 4.90 13.07 0.581 0.40 0.33 0.553 0.3 0.072 0.030 5.1023 0.duration Aluminium Copper 0.220 1.90 60.33 0.072 .00 0.304 0.077 0.075 0.00 0.120 11.660 3.320 7.900 2.40 38.053 0.00 115.08 0.304 0.150 1.07 0.750 8.54 0.097 1.4 0.265 0.54 0.072 0.27 0.40 38.10 18.150 1.220 9.0808 0.082 0.3 0.880 4.800 5.1 0.097 1.0444 0.072 0.280 27.074 0.075 0.11 0.071 0.1 KV PVC Insulated num Air Amp — 35 47 64 84 105 130 155 190 220 250 290 335 380 435 480 550 610 680 16 21 27 35 47 59 78 99 125 150 185 210 240 275 325 365 420 475 540 13 18 23 30 40 51 70 86 105 130 155 180 205 0.08 1.50 46.90 13.082 0.300 21.80 30.1 0.57 0.41 0.13 0.800 5.880 4.600 34.750 8.54 0.072 0.120 11.550 0.08 0.840 2.460 0.800 5.41 0.05 10.078 0.102 1.4.20 22.074 0.08 1.076 0.80 17.460 0.50 72.11 0.4 0.10 18.082 0.11 0.097 0.55 0.4 0.300 14 15 Aluminium Resi React ohm/km ohm/km 1.220 9.32 0.553 0.800 17.088 0.50 92.102 1.40 14.57 0.690 1.760 1.660 3.097 1.555 0.092 0.030 5.840 2.1 0.660 3.082 0.077 0.690 1.097 1.75 8.220 9.84 2.072 0.82 0.95 0 26 8 9 10 11 Ground Amp 39 49 65 85 110 130 155 190 220 250 280 305 345 375 400 425 470 530 590 23 32 41 50 70 90 115 140 165 205 240 275 310 350 405 450 490 540 640 21 27 36 45 60 77 99 120 145 175 210 240 270 Copper Duct Amp 38 48 64 83 110 125 150 175 200 220 245 260 285 310 335 355 375 425 740 20 27 35 44 58 75 97 120 145 180 215 235 270 300 345 385 485 460 550 17 24 30 38 50 64 81 99 125 150 175 195 225 Air Amp 35 44 60 82 110 130 165 205 245 280 320 370 425 475 550 590 660 725 870 20 27 35 45 60 78 105 125 155 195 230 265 305 350 410 465 530 605 785 17 24 30 39 52 66 90 110 135 165 200 230 265 1.00 57.13 0.000 57.900 13.371428571 12 13 Short Circuit Current Rating for 1Sec.00 47.16 0.102 1.050 10.80 30.08 1.41 0.07 — — — — 1.553 0.120 11.050 10. 072 0.500 Short Circuit Current Rating for 1Sec.66 3.07 0.41 0.80 17.20 94.13 0.072 0.500 72.3 0.50 46.08 0.53 3.000 57.10 18.072 0.072 0.1 0.01 13.3 0.15 10.08 0.050 10.39 22.500 72.082 0.1 0.08 0.58 8.750 8.30 21.16 0.57 0.304 0.100 18.11 0.07 0.082 0.8 1.07 0.16 0.690 1.01 13.071 0.90 2.90 37.54 1.28 14.071 0.45 26.220 9.08 0.1 0.1 0.074 0.000 57.660 3.600 34.072 0.40 38.077 0.500 46.29 4.27 0.59 0.1 — 1.900 21.00 59.07 0.800 5.120 11.41 0.00 7.500 2.07 — — 0.074 0.35 3.50 0.30 27.00 57.27 0.45 1.56 28.75 8.400 38.07 .58 5.240 280 315 375 425 480 62 70 86 105 130 155 180 205 240 280 315 375 425 480 13 18 23 30 40 51 70 86 105 130 155 180 205 240 280 315 375 425 480 300 345 385 425 470 555 99 99 120 145 175 210 240 270 300 345 385 425 470 555 21 27 36 45 60 77 99 120 145 175 210 240 270 300 345 385 425 470 555 255 295 335 360 390 470 81 81 99 125 150 175 195 225 255 295 335 360 390 470 17 24 30 38 50 64 81 99 125 150 175 195 225 255 295 335 360 390 470 d) AL/COPPER COND.80 30.11 0.46 34.030 5.16 21.071 0.33 0.200 22.93 11.33 0.300 21.13 0.072 0.5 2.07 — 0.40 38.58 5.00 47.072 0.1 0.57 0.29 4.078 0.60 34.1 0.400 14.80 5.460 0.760 1.12 11.07 0.32 42.88 4.000 47.600 34.15 10.4 0.150 1.20 790 910 1030 1140 1250 2.078 0.20 22.70 6.00 3.08 0.840 2.7 2.220 1.456 0.07 0.58 8.21 0.90 13.11 0.320 7. XLPE INSULATED CABLES num Copper Air Ground Duct Amp Amp Amp 120 130 115 145 155 140 170 185 160 215 225 195 260 265 235 305 300 265 345 335 295 395 380 330 470 435 380 540 490 425 380 630 550 430 730 610 480 840 680 530 960 740 580 1070 790 105 120 105 125 145 125 150 170 150 190 210 180 230 250 215 305 355 400 435 520 675 90 90 110 135 165 200 230 265 305 355 400 435 520 675 17 24 30 39 52 66 90 110 135 165 200 230 265 305 355 400 435 520 675 14.59 17.93 3.32 7.duration Air Amp 155 185 220 275 340 390 440 510 600 680 480 530 580 630 670 135 165 195 240 295 Aluminium Copper 2.21 0.500 46.50 72.05 10.13 0.16 0.70 6.54 1.800 30.4 0.072 0.097 0.90 0.00 47.35 3.40 14.900 13.01 7.1 0.300 27.90 1.80 30.60 47.22 9.10 17.300 27.10 18.072 0.072 0.900 2.800 17.880 4.22 75.20 22.1 0.077 0.1 — — 5.21 0.29 2.03 5. 10 17.20 94.32 42.20 37.00 7.260 295 335 395 450 520 280 310 350 400 445 500 240 270 305 350 390 440 335 380 430 500 570 650 V Earthed) AL/COPPER COND.70 6.39 22.58 5.duration Air Amp 155 185 220 275 340 390 440 510 600 680 790 910 1030 1140 1250 135 165 195 240 Aluminium Copper 2.01 .45 26.20 37.70 6.00 59.39 22.60 17.20 94.58 8.16 21.39 22.45 26.20 37.70 6.20 Short Circuit Current Rating for 1Sec.10 17.50 90.45 26.35 3.10 114.32 42.20 71.90 57.16 21.35 3.duration Aluminium Copper 2.29 4.58 5.58 8.15 10.32 42.00 3. XLPE INSULATED CABLES num Copper Air Ground Duct Air Amp Amp Amp Amp 120 130 115 155 145 155 140 185 170 185 160 220 215 225 195 275 260 265 235 340 305 300 265 390 345 335 295 440 395 380 330 510 470 435 380 600 540 490 425 680 630 550 480 790 730 610 530 910 840 680 580 1030 960 740 630 1140 1070 790 670 1250 105 120 105 135 125 145 125 165 150 170 150 195 190 210 180 240 230 250 215 295 260 280 240 335 295 310 270 380 335 350 305 430 395 400 350 500 450 445 390 570 520 500 440 650 ) AL/COPPER COND.10 114.29 4.01 13.28 14.45 26.10 17.20 37.01 7.15 10.15 10.40 143. XLPE INSULATED CABLES num Copper Air Ground Duct Amp Amp Amp 120 130 115 145 155 140 170 185 160 215 225 195 260 265 235 305 300 265 345 335 295 395 380 330 470 435 380 540 490 425 630 550 480 730 610 530 840 680 580 960 740 630 1070 790 670 105 120 105 125 145 125 150 170 150 190 210 180 11.00 7.58 3.46 34.22 75.16 21.46 34.50 90.01 7.46 34.58 5.00 59.60 47.59 17.35 3.00 2.00 2.01 13.93 11.39 22.56 28.60 3.20 Short Circuit Current Rating for 1Sec.90 57.10 17.58 8.93 11.01 13.70 6.16 21.59 17.59 17.15 10.46 34.56 28.00 3.40 143.32 42.29 4.60 47.56 28.93 11.22 75.28 14.58 5.90 57.28 14.90 57.28 14.56 28.20 71.35 3.29 4. XLPE INSULATED CABLES num Copper Air Ground Duct Amp Amp Amp 240 280 335 380 450 510 595 690 800 910 1010 295 335 380 430 500 570 650 8.59 17.45 26.8 12.2 24.39 22.32 42.230 260 295 335 395 450 520 250 280 310 350 400 445 500 215 240 270 305 350 390 440 ) AL/COPPER COND.56 28.8 65.5 19.46 34.93 11.2 82.1 41.60 13.4 15.28 14.8 104 Copper .20 Short Circuit Current Rating for 1Sec.20 37.8 31.90 57.duration Air Amp Aluminium 9.10 17.16 21.4 51. 58 0.55 0.12 1.86 .96 0.08 1.82 0.95 0.5 k.96 0.22 1.93 1 1.87 0.1 1.21 1.06 35 40 45 50 55 60 65 70 75 80 Ground Corrrection Factor:K2 Insulation Corrrection Factor:K3 Soil Thermal Resistivity: 2.46 0.5 0 0 0 0 0.76 0.96 35 0.m/W XLPE/EPR Ground Temp© PVC XLPE/EPR Resistivity K3 1.76 0.71 0.5 1.53 0.18 1.6 0.17 1.05 0.65 0.89 1.15 1.85 0.12 1.04 0.89 3 0.87 0.71 0.07 1.71 0.91 0.1 1.8 0.5 2 2.05 1 0.61 0.Corrrection Factor:K1 Insulation Ambient Temp© PVC 10 15 20 25 1.05 1 0.38 Corrrection Factor:K3 Nature of Soil Very Wet Soil Wet Soil Damp Soil Dry Soil Very Dry Soil K3 1.04 10 15 20 25 1.45 0 0 0 0 0 0.13 1.65 0.71 0.63 0.5 0.41 40 45 50 55 60 65 70 75 80 0.79 0.94 0.77 0. . 159 React ohm/km 0.08 0.127 0.0769 0.082 0.079 0.1 KV XLPE Insulated Copper Resi ohm/km 1.159 0.557 0.54 0.196 0.097 0.553 1.08 0.071 0.93 0.247 0.074 0.072 0.495 0.102 0.93 0.077 0.0602 — — 1.0283 0.07 — — 0.068 — — 0.196 0.072 Air Amp — 45 61 83 115 135 170 210 255 300 342 385 450 519 605 700 809 935 1065 — — 30 40 53 70 99 117 140 176 221 258 294 339 402 461 542 624 723 — — 30 40 53 70 99 117 140 176 221 258 294 Ground Amp 48 60 80 104 130 155 185 225 265 300 335 380 435 490 550 610 680 740 780 — — 44 55 74 94 120 145 170 210 250 285 315 355 410 460 520 580 680 — — 44 55 74 94 120 145 170 210 250 285 315 Copper Duct Amp 47 59 78 102 115 140 165 200 235 265 300 335 385 430 480 530 590 630 660 — — 37 47 61 78 100 120 145 175 210 240 270 300 350 390 440 480 575 — — 37 47 61 78 100 120 145 175 210 240 270 Air Amp 45 57 77 106 145 175 215 270 330 380 430 495 590 670 780 900 1020 1140 1250 — — 39 50 67 85 125 155 190 235 290 330 375 435 510 590 670 750 875 — — 39 50 67 85 125 155 190 235 290 330 375 .08 0.0468 0.0602 0.097 0.074 0.0608 0.102 0.55 1.08 0.082 0.07 0.102 0.57 1.08 0.127 0.343 0.0769 0.085 0.075 0.072 0.495 0.097 0.102 0.088 0.343 0.555 1.671 0.0965 0.196 0.08 0.085 0.07 0.555 1.072 0.077 0.097 0.93 0.581 1.0362 0.0225 — — 1.078 0.078 0.097 0.092 0.16 17 18 19 Ground Amp — 48 62 81 99 117 138 168 204 230 265 295 340 390 450 500 555 625 690 — — 34 43 57 78 95 116 140 170 200 225 255 285 325 370 435 481 537 — — 34 43 57 78 95 116 140 170 200 225 255 Aluminum Duct Amp — 45 62 80 90 110 125 155 185 210 230 260 300 335 380 430 485 530 570 — — 28 37 48 61 80 94 110 140 165 185 210 235 270 305 350 405 470 — — 28 37 48 61 80 94 110 140 165 185 210 20 21 22 23 1.077 0.082 0.553 1.671 0.0965 0.078 0.159 0.671 0.072 0.075 0.54 0.553 1.247 0.247 0.102 0.495 0.08 0.553 1.343 0.072 0.0602 0.076 0. 0602 — — 3.0602 0.072 0.0602 0.19 1.0965 0.077 0.127 0.071 0.196 0.078 0.072 0.078 0.074 0.0602 0.07 — — 0.247 0.0495 0.196 0.69 2.0965 0.07 285 325 370 435 481 537 — 95 116 140 170 200 225 255 285 325 370 435 481 537 — — 34 43 57 78 95 116 140 170 200 225 255 285 325 370 435 481 537 235 270 305 350 405 470 — 80 94 110 140 165 185 210 235 270 305 350 405 470 — — 28 37 48 61 80 94 110 140 165 185 210 235 270 305 350 405 470 339 402 461 542 624 723 — 99 117 140 176 221 258 294 339 402 461 542 624 723 — — 30 40 53 70 99 117 140 176 221 258 294 339 402 461 542 624 723 355 410 460 520 580 680 — 120 145 170 210 250 285 315 355 410 460 520 580 680 — — 44 55 74 94 120 145 170 210 250 285 315 355 410 460 520 580 680 300 350 390 440 480 575 — 100 120 145 175 210 240 270 300 350 390 440 480 575 — — 37 47 61 78 100 120 145 175 210 240 270 300 350 390 440 480 575 435 510 590 670 750 875 — 125 155 190 235 290 330 375 435 510 590 670 750 875 — — 39 50 67 85 125 155 190 235 290 330 375 435 510 590 670 750 875 .11 0.1 0.08 0.072 0.07 0.07 — 0.072 0.074 0.495 0.07 0.097 0.93 0.0769 0.0602 — 0.93 0.0602 0.0602 0.38 1.0769 0.08 0.072 0.07 0.08 0.0769 0.071 0.159 0.247 0.077 0.07 0.0965 0.08 0.071 0.343 0.07 0.0602 0.072 0.127 0.671 0.671 0.072 0.072 0.07 0.47 0.072 0.159 0.072 0.343 0.0602 0.08 0.127 0.0. . . 1 1.55 1 0.69 0.1 KV) 1.62 0.73 Depth Facator (K5) Laying Depth(mt) Rating Factor 0.05 0.7 0.75 0.7 1 0.8 0.55 1 0.04 1 0.75 0.9 0.77 0.82 0.7 0.8 0.6 0.8 0.1 1.28 1.65 0.8 0.16 1.14 1.22 1.96 (Grouping factor)= 2 1 0.71 0.9 1.65 1 0.98 1.768 0.05 1.7 0.74 0.74 0.8 0.9 0.75 0.73 0.8 0.7 1.09 1.125m 0.Correction Factor(K4)(Ground Cable Dist) No of Circuit Nill cable Dia 0.8 No of Cable/Tray 1 2 3 4 5 6 7 8 1 1 0.25m 0.94 0.85 0.2 0.6 0.69 0.25 1.85 0.84 0.6 0.975 0.88 0.16 1.5m 1 2 3 4 1 0.5 0.878 0.8 0.658 HT XLPE 1.75 0.55 0.9 0.5 1.9 0. Derating factor) PVC Flexible (Up LT PVC LT XLPE to 1.74 0.01 1 1 1.5 0.8 5 6 1 2 3 4 5 6 7 8 25 30 35 40 45 50 55 60 (Temp.134 1 1 1 0.69 .1 0.85 0.95 0.76 0.78 0. . 45 26.56 28.59 17.005 7.28 14.45 .29 4.00 — — 0.93 11.01 13.940 1.20 37.01 7.564 0.58 8.90 57.29 3.10 17.32 42.56 28.940 1.20 71.20 94.01 7.24 25 Short Circuit Current Rating Aluminium Copper 0.20 71.45 26.60 47.15 10.46 34.572 0.28 14.572 0.28 14.290 4.350 3.16 21.430 2.700 6.10 0.01 13.70 6.16 21.35 3.22 75.22 — — 0.70 6.59 17.580 8.29 4.150 10.504 2.50 90.930 11.858 1.01 13.564 0.00 59.29 3.58 8.430 2.39 22.575 5.10 17.09 114.572 0.60 47.59 17.430 2.376 0.288 3.93 11.50 2.858 1.39 22.564 0.940 1.58 5.20 37.15 10.40 143.46 34.50 90.376 0.858 1.58 5.376 0.32 42.16 21.00 59.09 — — 0.90 57.50 2.00 — — 0.35 3. 59 17.20 71.46 34.20 71.17.376 0.93 11.09 — 3.35 3.01 7.09 — — 0.60 47.430 2.70 6.58 8.28 14.32 42.70 6.22 — — 0.58 5.90 57.56 28.940 1.29 4.15 10.01 13.39 22.16 21.59 17.50 90.858 1.16 21.29 4.32 42.46 34.50 90.45 26.29 3.60 47.32 42.50 2.39 22.90 57.22 — 2.20 71.01 13.46 34.15 10.22 26.00 59.10 17.10 17.20 37.60 47.50 90.58 8.28 14.56 28.00 59.20 37.56 28.90 57.35 3.01 7.93 11.572 0.09 .58 5.00 59.564 0.39 22.45 26.20 37. . . 64 0.66 8 1 0.67 0.69 0.74 0.69 0.75 0.76 0.72 0.71 0.66 0.67 0.68 0.68 0.66 0.73 0.7 0.68 0.77 0.66 0.675 0.72 0.7 0.71 0.(Grouping factor)==No of Tray 4 6 3 1 1 1 0.64 .68 0.78 0.7 0.