endobj <> 168 0 obj <> 132 0 obj 204 0 obj 230 0 obj Make your selections below and the form will automatically update the values. <> endobj 0.00 0.00. <> <> <> 78 0 obj endobj 200 0 obj <> endobj 98 0 obj <> endobj 231 0 obj <> endobj Hence nearest higher size 300 sq mm is required. <> 38 0 obj <> 151 0 obj <> Step 3 – Check / Calculate Voltage Drop: Check for voltage drop with the cable size chosen. 114 0 obj endobj <> The Construction Monkey Motor calculator lets you figure out electrical characteristics of your system given a specific motor. 166 0 obj endobj endobj endobj 63 0 obj system, Ish (for duration t=1sec) = 26.2 KA, With Aluminum conductor, XLPE insulated cable =. 56 0 obj 74 0 obj endobj 227 0 obj Required fields are marked *. endobj Tags: Cable Size CalculationElectrical MachineHT MotorsLT Motors, Your email address will not be published. 149 0 obj <> <> 144 0 obj 248 0 obj endobj endobj <> <> endobj <> The cost of labor for laying of higher size cable will also be higher compared to respective lower size cable. 243 0 obj endobj endobj <> <> <> endobj 35 ampere x 125% = 43.7 ampere @ 44 ampere. <> <> endobj 240 Sq.mm cable satisfied all three condition, so it is advisable to use 3 Core 240 Sq.mm cable. 24 0 obj endobj <> endobj <> endobj <> endobj <> 27 0 obj 57 0 obj Cable Size Calculation of 100 KW LT Motor generally we know power formula P= √ 3 x V x I Cos Φ let I = P / √ 3 V x Cos Φ we know √ 3= 1.732, Cos Φ = power factor = 0.8 What Is The Use Of Cable Size Calculator? 191 0 obj 79 0 obj Your email address will not be published. <> in USA and EU. endobj 51 0 obj endobj endobj The heat won’t be able to dissipate properly hence it will warm up the cable itself and those in its contact. endobj 23 0 obj This is the full load current cable needs to cater in Ideal condition. NEC Code 430.22 (Size of Cable for Single Motor): Size of Cable for Branch circuit which has Single Motor connection is 125% of Motor Full Load Current Capacity. 33 0 obj <> 70 0 obj endobj endobj <> endobj Cable Grouping Factor (No of Tray Factor), K2 = 0.68 (for 3 trays having 9 cable each), Let’s select 1.1 KV, 3 core, 240 Sq.mm, Aluminum, XLPE, Armored cable for single run, Technical Details For 1.1 KV, 3 Core, Aluminum/Copper Conductor, XLPE Insulated, Armored Cables, Current capacity of 240 Sq.mm XLPE Armored aluminum cable in Air is 402 Amp, Total derating current of 240 Sq.mm Cable = 402×0.5984 = 240.55 Amp, Resistance = 0.162 Ω/Km and Reactance = 0.072 Ω /Km, Voltage drop, V2 = 0.3 Volts/Km/Amp    (as per Havell’s brochure), Terminal voltage at Motor, V2 = 415-13 = 402 V, To decide 240 Sq.mm cable, cable selection condition should be checked. endobj <> Electrical Wire Size Calculator. 61 0 obj endobj endobj <>stream % efficiency - ? 4 - Enter length of cable run required [power source to load]. 201 0 obj 2 - Enter nominal system voltage [or pv array voltage for solar cables]. Required Cable Size (mm 2) Voltage Drop (volts) Percentage Drop (%) Load (Amps) = Reset. 4. <> <> <> <> 66 0 obj 113 0 obj Now we have to discuss the main topic that’s how to calculate the cable size for motors? <> <> <> <> <> <> 41 0 obj endobj 72 0 obj endobj <> Aluminum. 181 0 obj 67 0 obj 146 0 obj <> <> endobj 216 0 obj endobj endobj <> endobj <> endobj endobj 190 0 obj 152 0 obj <> endobj 111 0 obj 37 0 obj endobj endobj Pf = 0.8, Efficiency = 94%. 89 0 obj 108 0 obj I = Load Current. endobj <> Cable length = 200 m. Load Current = P / (1.732 x V x Pf x Eff) —> (P = √3 x Vx I CosΦ = for three phase circuits) = 125000 / (1.732 x 415 x 0.8 x 0.94) ~ 230 A. Go vertically to the head of that column for the recommended wire size. endobj 203 0 obj <> endobj <> <> endobj <> endobj endobj <> The table will give you the size of the short circuit protection as a percentage of the full load current. ( % ) load ( amps ) = 26.2 KA, with Aluminum conductor XLPE! 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