# cable trench design calculation

He is FIE ,MIE and CEng from Institution of Engineers,India. I am very thankfull to you in knowing the cable size calculation from the site and i want to bring to your notice regarding a typing mistake. of Excavation. Team Trench We have a strong, experienced Team at Trench who are all committed to providing the best customer care. and there is another thing i would like to point out, this cable S.C. capacity which you have given as 8.2 KA, is this correct? He is member of Institution of Engineers (MIE) and CEng,India. Therefore, Standards & Specifications Department of National Grid Saudi Arabia formed a team of experts to study the possibility of standardizing/unifying cable design to three sizes; 1200sqmm, 2000sqmm and 2500sqmm. Excavation of Trench How to calculate Trench Volume George Properties Excavation copper or aluminium ?? thanks for all your hard work, sir if you mention with references of electrical codes that could be more useful. that is the reason, I have upload some abstract of IS code.not IS code itself. If You find this content in any other site,it makes the page you are viewing an infringement of the copyright. Voltage Drop of Cable= (1.732x Current x (RcosǾ+jsinǾ) x Cable Lengthx100) / (Line Voltage x No of Runx1000) Trench is now part of the OBO Bettermann group giving us access to their excellent portfolio of products – click on the OBO logo above for more information. Enter your email address to follow this blog and receive notifications of new posts by email. Oldcaslte Infrastructure trench components have superior chemical resistance, strength, low water absorption, and substantial freeze/thaw resistance. if the project has already started and you knew exactly where the underground cables will run, i suggest that you measure the actual length of the proposed run. File Size: 43.16 Kb. Cross sectional area . I once again thank you for all your sincere efforts! V = I*Z? Process flow for this stud… I SEARCH LOT OF PAGES FOR CABLE SELECTION. Sir , Some examples may be laying cable duct using trench-less technologies (Controlled horizontal drilling, pipe-jacking, microtunneling), crossing river beds, installation of cable support structures for decks and viaducts (including design, supply and installation of systems for compensation of thermal expansion). Each and every thing is explained properly and with examples. No side entrances are allowed, either at the transformer or switchgear/ service entrance. is same, thank u sir for a great article, but it is very difficult to calculate the resistance and reactance of the cable…….sir plz add the formulas for how to calculate the reistance and reactance of the cable. i like to know how do you calculate cable current carrying of a cable. UR PAGE IS VERY VERY HIGHLY SUPERB. REV. ... 5.5 Cable trench design . capacity and what is total capacity of 3.5 core 35 sq mm alu armed cable. equipment rate will be your calculation of time based on the known capacity of the equipment multiplied by the rental rate per hour, rate of the operator included. Terms of Use - I always indicate Reference Code Where it is available or Applicable. of Cable / Trench” for Your Excel Programme titled “Calculate Cable Size & Voltage Drop” ? How can we select the size of flexible wire for power & lighting loads? Please let me know about allowable voltage drop between PCC panel to MCC panel? Maximum Ampacity calculation of UG cable Ampacity is the current that a conductor can carry continuously without exceeding its temperature rating. Estimate trench excavation - online calculator. Cable derating Amp (187 Amp) is higher than full load current of load (139 Amp) = O.K; Cable voltage Drop (2.2%) is less than defined voltage drop (5%) = O.K; Number of cable runs (1) ≥ (139A / 187A = 0.78) = O.K 2. Downloads: 115. Dear Jignesh sir, Calculated Width of Cable Tray as per Calculation=No of Layer of Cable X No of Cable Tray Run X Width of Cables; Width of Cable Tray as per Calculation=1X1X493 =493 mm; Checking Depth of Cable Tray; Actual depth of Cable Tray = No of Layer of Cable X Maximum Diameter of Cable; Actual depth of Cable Tray=1X68.6 =68.6mm; Checking Weight of Cable Tray please can you send me problems associated with 11kv feeder, and ways of proffering solutions. Current Capacity of 70 Sq.mm cable is 170Amp,Resistance=0.57Ω/Km and Reactance=0.077 mho/Km. Dear sir i wanna purchase electrical notes in pdf form kindly let me know how can i get it . Hello sir, now i am working as a Electrical Site Engineer in construction field in Saudi Arabia sir help me to survive in this position i need to know the calculation voltage drop and current rating and short circuit current. Measure the width and depth of the trench at equally spaced intervals along its length. we have to purchase IS code for study. or log in (Cable S.C Capacity (8.2KA) is higher than System S.C Capacity at that Point (6.0KA) =O.K) Sir let can you explain how can you tell 95sq mm cable amps 200 and resistance ,reactance, shorts circuit current 8.2ka .please tell reason behind this. Here Voltage drop for 70 Sq.mm Cable (5.8%) is higher than Define Voltage drop (5%) so either select higher size of cable or Increase no of Cable Runs. Hi.. 30 cm shall be observed. Can you pls explain how 100 in the nominator( next to cable length) & 1000 in the denominator (next to no of runs ) arrives in the formula. Moreover, certain doubts are there which needs to be clarified for better understanding. then take the depth of the excavation including the sub-base from the electrical detail plan as well as the width of the trench. Please upload HT cable sizing calculations? About Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). 3D Cable Tray, Conduit, Trench and Cable Scheduler It enables the users to quickly create/route complex cable trays, conduits and trenches with an intuitive interface Users can assign start (from) and end (to) points of cable in 3D using Cable Scheduler. The cable is bent into form a final time and stays in this position for the duration of its use. Dear sir Design Drawings and Profiles 2.7 132kV Underground Cable Work No. then, getting the total volume by multiplying the total length x height x average width. Get Fresh Updates On your job applications, and stay connected. If the width of the top and bottom of the trench will be different then calculated Additionally useful volume C and volume of sloped sections D. In order to find out the volume of excavation for a simple footing, the following formula is used :-CL x W x D = Cu.Ft. 1.4.5 In cases where cables have to cross underground pipelines or sewers a vertical clearance of min. A minimum distance of 30 cm shall be observed between the lowest cable in the instrument trench and the highest cable in the electrical trench. Cookie Policy. Change ), You are commenting using your Google account. Soil Details: Thermal Resistivity of Soil is not known. which are sent to your email by me, 520 kw cu cable suitability sq mm of cable. Submitted By: Ananya Majumdar (An10709) Submitted On: 26 Nov 2013. Three-sided precast trench is the multifaceted channel solution for applications that range from cable distribution and management to drainage runoff capture, containment, and transport. File Size: 43.16 Kb. for single run you can use single core rite why used 3.5 core instead of single core. Total De rating Current of 70 Sq.mm Cable= 200×0.93 =187 Amp. sir, your articles are superb,If i was in touch with you physically, we would have discuss more, I appreciate your work. Service Entrances On the initial design, the trench length must be determined, (see Section 6.8 for details). system short circuit capacity? if the project has already started and you knew exactly where the underground cables will run, i suggest that you measure the actual length of the proposed run. Reset are from manuals or Books. Keywords: acceptance testing, cable, cable installation, cable selection, communication cable, Cable jacket walls below 0.010” are not Subcables may be individually jacketed. 4.1 Abbreviations CBS . i need to know cable selection on base of kw and A, In case of voltage drop calculation, 139 A has been considered for calculation against 159. you can not reproduce,republish or communicate any of the content , including files downloadable from this website, without the permission of the copyright owner.The use of this content on any other websites breaches copyright Act. Full Load Current= (100×1000) / (1.732×415) = 139Amp. ( Log Out /  And how you calculate the current capacity of those cables ?? RETAINING WALL DESIGN (BS 8002:1994) TEDDS calculation version 1.2.01.06 Ultimate limit state load factors Dead load factor f_d = 1.4 Live load factor f_l = 1.6 Earth and water pressure factor f_e = 1.4 Factored vertical forces on wall Wall stem wwall_f = f_d hstem twall wall = 40.5 kN/m Rating: 16 Description. Change ). You can buy at any time through ONLINE either in Indian Rupees or US$. Which armored cable is best to use and what is the minimum voltage drop, I am try to buy Voltage drop calculation please help me. STANDARDS FOR ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION AND UTILIZATION.. IS STANDARDS will be more helpful and fruitful to the engineers like us to be a real Electrical engineers.. Thanking you in anticipation and for your valuable knowledge.. February 8, 2014 armed Cable. But please in this calculation of: Full Load Current= (KVAx1000) / (1.732xVoltage). In addition, it will achieve financial savings as a result of this design optimizing. Calculation of the trenches or ditches Specify dimensions in metres L - the total length of trenches or ditches A - width at the top of the B - bottom width H - the depth of the trench The program calculates the volume and surface area of the trench. Abstract: The design, installation, and protection of wire and cable systems in substations are covered in this guide, with the objective of minimizing cable failures and their consequences. Sir can you share the voltage drop formula for single phase? Installation Of Cable Trench Covers & Cable Protection Tiles. In case study to it was written as “Total De rating Current of 70 Sq.mm Cable= 200×0.93 =187 Amp”. Calculation Reference RCC Trench Reinforced Concrete Drainage Structural Design Calculation Preview. I will suggest why put them in hard copy people will buy them in a hurry. To decide 95Sq.mm Cable, Cable selection condition should be checked. 4.0 DEFINITIONS AND ABBREVIATIONS . Figure F-3 Cable Feed into Cable Tray d) Cable sheaves or a shoe may be used to guide cable into the desired direction, maintain minimum bend radius, and reduce friction. Thanks for sharing the most demanding calculation My question is how to calculate Short circuit capacity at that point ? so pls ask me what is my per phase Amp. will it be the same procedure to calculate? Privacy Statement - Cement-bound sand . Thanks for sharing valuable information in detail…. Typical Joint Bay for UG cable UG cable laying design procedure(….Continued) 24. We offer design engineering services incorporating Pre-Engineering Plan sets for transforming into the Conceptual Plan sets to ensure our technical approach will meet the necessary relevant local and International Standards with respect to equipment’s selection, Electrical & Civil design … I want to know how we can do the calculation for DC cable sizing. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics. Sharing Abstracts,Notes on various Electrical Engineering Topics. I have tried more to find out exact formula for it but i couldn’t get it, So Kindly help to get me out from this problem. How to find out or know the Short Circuit capacity of cable which should be higher than the if this is for tendering purposes, measure the total length of the trench as shown on the plan x depth as shown on the detail section of the cable trench x average width as explained above. A footing is a good instance of the trench. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! *, *VIVEKANAND JHA (**Design & Costing Engg.)*. Register now Design of RCC Trench Design of RCC Trench. CPT ElectricalEngineers LIKE ALL EEP OUT PUTS. Bayt.com is the leading job site in the Middle East and North Africa, connecting job seekers with employers looking to hire. 5.20. listing 79 Comments. What would be the cable size in laying under the soil with ambient temperature. *How can I calculate busbar size on behalf of Fault Current in Control Panels??? He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. How to select the value of cosǾ & sinǾ in the formula. The stress on the material during final bending is not characterised by alternating stress. The content in electricalnotes.wordpress.com is for personal, non-commercial use only. Can u suggest what will be maximum distance length of point wiring with conduit and wiring is considered as per code reference in commercial project? Go to “Electrical Notes” Page. how to measure HT and LT cable depend upon load voltage drop in HT and LT cable Total curent rating 500A lenght ofcable 100mtr 400v wat size of cable using, sir can you explain what is 0.125m,0.25m ,0.5m in cable distance factor. Dear Sir , Greetings on my behalf to Your good self . Dura Trench Utility and Cable Trenches are the first utility trench on the market to offer fully integrated channel strut cast into the body of the trench. Dura Trench offers many different tools for calculating trench drain and slot drain size. ( Log Out / Thanks a lot to share your knowledge with us. Sorry, your blog cannot share posts by email. For any load, what happen if we use the cable rating above its normal rating? Let’s Select 3.5Core 70 Sq.mm cable for Single run. All cables and ducts laid into cable trrench should be over-protected by a cable protection cover or tape depending upon the highest voltage cable to be protected within the cable duct – typically in the UK the following cable protection tapes and covers are used for LV, MV and HV cables. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics. how we can derived it?? 3 CONTENTS Page No. sir how can we calculate inductance of power cable? How do financial managers calculate the average tax rate. I here by just want to make an appeal to you Sir to Upload I.S. DOC NO: M2011EP008A-091. Title Page 1 FOREWORD 2 CONTENTS 3 1.0 INTRODUCTION 5 2.0 OBJECTIVE AND SCOPE 6 3.0 PLANNING STAGE 7 3.1 Desk Study 7 3.2 Timing and Location 7 3.3 Statutory Requirements 8 4.0 DESIGN STAGE 9 4.1 Temporary Support Design 9 4.2 Design Considerations 10 4.2.1 Loading 10 4.2.2 Drainage 10 4.2.3 Groundwater Control 11 4.2.4 Existing Man-Made Slope … CABLE TRENCH - DESIGN CALCULATIONS. 2) I have 63 amp 4 pole MCB so what is my per phase current capacity. a. Posted on May 19, 2012 by Francesco Miceli. Membership No:M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). if the soil is made of hard material, then it is just a matter of multiplying the total length x height x width....calculation of rates depends on your total equipment hours x hourly rate plus your total man-hours x their hourly rates excluding those of the equipment operator if they were already included in the rental rate of the equipment assuming of course that they were rented. as short circuit capacity of the cable is taken from the table, Plz Sir clear my concept about my sent issues. ( Log Out / Change ), You are commenting using your Facebook account. (1) Cable De rating Amp (187 Amp) is higher than Full Load Current of Load (139 Amp) =, (2) Cable Voltage Drop (2.2%) is less than Defined Voltage drop (5%) =, (3)No of Run of Cable (1) >= (139A / 187A =0.78) =, (4) Cable S.C Capacity (8.2KA) is higher than System S.C Capacity at that Point (6.0KA) =, Method for Installation of Cable & Wire (Part-1), How to Design Efficient Street Lighting-Part-4, How to Design Efficient Street Lighting-Part-3, How to Design Efficient Street Lighting-Part-2, How to Design Efficient Street Lighting-Part-1, Quick Reference Lighting Power Densities, Calculation of Crippling (Ultimate Transverse) Load on Electrical Pole, Various Factors for Illumination Calculations, Calculate Transformer Regulation & Losses (As per Transformer Name Plate), Type of Lighting Bulbs (Shapes and Sizes) Part-5, Type of Lighting Bulbs (Shapes and Sizes) Part-4, Type of Lighting Bulbs (Shapes and Sizes) Part-3, Type of Lighting Bulbs (Shapes and Sizes) Part-2, Type of Lighting Bulbs (Shapes and Sizes) Part-1, Methods of Earth Resistance Testing (Part-3), Methods of Earth Resistance Testing (Part-2), Methods of Earth Resistance Testing (Part-1), Method for Installation of Earthing Strip, Calculate Size of Anchor Fastener for Water Pipe Support. He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. Myself M.a.Hussain, am an electrical engineer graduate i have a doubt in selection of cable section where just wrote current carrying capacity for the 70 sq mm cable as 170 amps without any formula or derication. Design requirements for cable trenches are detailed below with Clause . Sheaves, or a shoe, may be used to guide the cable into the tray. Design Calculation for Cable Trenches1 - pt.scribd.com ... Cable Trench Answer added by ernie rodriguez, Fire Suppression Designer/Estimator/Project Manager , Kidde Canada Inc. Answer added by james lapiad operio operio, Site Engineer. Ground Temperature is approximate 35 Deg. nice explanation.It helped me a lot. as we are using 95sqmm cable it should be “Total De rating current of 95 Sq.mm cable=200*0.93=187 Amp”. If you want to change to … Thank you very much Jignesh sir for your all hard work and perseverance that you have put to make all electrical engineers knowledgeable and aware about the practical Electrical enegry or power sector…. Let’s Select 3.5Core 95 Sq.mm cable for Single run, S.C Capacity =8.2KA. Kindly reply me with your formula/equation of those cable’s phase and ground. Calculation Reference RCC Trench Reinforced Concrete Drainage Structural Design Calculation Preview. Design of RCC Trench Design of RCC Trench. Can anyone help me in this please? Voltage drop calculation: The single phase AC voltage drop is calculated as: $$V_{d1\phi}=\dfrac{I L (2 Z_c)}{1000}$$ Where I is the load current, L is the distance, and $$Z_c$$ is the cable impedance in O/km. Every day, thousands of new job vacancies are listed on the award-winning platform from the region's top employers. For example, in a 12-foot-long trench, you may choose to record the dimensions every 3 … 23. Typical UG Cable Trench Road Crossing (….Continued) UG cable laying design procedure (Continued….) Kind regards Mr Hibbert. No of Run of Cable is 1 Run. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. Pls suggest. Trench Excavation Estimate trench excavation - online calculator . I was looking for such article from long time. Thanks. The model can also be used for the temperature field calculation of cable in tunnel. Please can you explain this (1.732) value stands for. Utilities around the world are going for optimization of utilized equipment (reduce capital and operational cost). dear sir help me to calculate Rcos#and jsin# where value of cos# is 0.8 and sin# is 0.6 but how to calculate value of R and j, Sir plz send me voltage drop calculation for 180 amp. 1) I have 3.5 core 35sqmm Alu. To decide 95 Sq.mm cable, cable selection condition should be checked. cable surface.Sub-cabling permits neat and simple formation of branch legs from the main cable and can be used to aid in identifying wire groups. If I am wrong, please correct me…. There is also a trench drain calculator spreadsheet attached that can help with trench drain design. Cable Laying Detail: Cable is directed buried in Ground in trench at the depth of 1 meter. Thanks for such a detailed description of cable selection guide. • IEC 60287 - Electric cables – Calculation of the current ratings . 2 Design Drawings. Calculation: Consumed Load= Total Load x Demand Factor The three phase AC voltage drop is calculated as: $$V_{d3\phi}=\dfrac{I L (\sqrt{3}Z_c)}{1000}$$. Your blog & respective calculations are very clear to understand. thank you very much for your great support. Refer to the tape lying beside the trench to establish the distance between measurements. Hi, I’m trying to ascertain the size of 3 core wired armoured cable I will need to keep voltage drop to a minimum level to ensure an existing 100am 240V 18KVa supply is still maintain at that level 300m away from the supplies supply….on-line calculators suggest I might need a 125mm/6 inch cable? For plastic jacketed cables, typical wall thickness is 10% of the unjack eted diameter or 0.010” minimum. What is Calculation of electrical cable size? This site uses Akismet to reduce spam. My load is 4836a three phase tell me standrd size of cable for each phase length is 100feet. © 2000-2020 Bayt.com, Inc. All Rights Reserved. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. I PROUD ABOUT UR KNOWLEDGE SIR .THANK U, Sir please give the correct formula how to calculate the size of the cable. Trench stands for an extended excavation that is separated from pits or basements. I can’t understood how to get current capacity of cable.u take direct value of 79 and95 sq mm cable rattling in dalution, I have 60kw three phase Solar 415 volts power supply from my house and I need to put 30HP water pump on water source which is 2500m away. 10 x cable external diameter for multiple bending. c) From cable reel to cable tray, the cable is fed from the top of the reel to main-tain required curvature. Can you tell me which cable is use in your calculation ?? 4.2 . In the correction factor, K3 stands for what? Membership No:F-1264873 ,M-1473586.He has more than 19 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). I need busbar calculation formula for control panels applications. HDD DRILLING RIG PROPOSED DIRECTIONAL DRILL ROUTE PROPOSED OPEN CUT TRENCH ROUTE ROAD LEVEL RIVER/STREAM BED LEVEL GROUND LEVEL 1.All dimensions are in metre unless otherwise stated. Learn how your comment data is processed. (1.732x Current x (RcosǾ+jsinǾ) x Cable Lengthx100) / (Line Voltage x No of Runx1000). All the information and technical things has to be transparent and to be made easy to understand, so that the beginners and technicians can enter easily into the subject to explore new things and to make better & safe the existing! Current Capacity of 95 Sq.mm cable is 200Amp,Resistance=0.41Ω/Km and Reactance=0.074 mho/Km. It is a project i am working on. 0 DESIGN OF CABLE TRENCH TYPE -A-A A) ... Design of the BaseSlab: Load calculation Wall load Second wall Self wt of slab Load due to cable SAND FILLING 1 Total Pmax Moment calculation at base slab 48.059 kn/mtr = = = = 0.200 x 0.200 x 2.125 x. Rating: 13 Description. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. For proper trench drain design you can use the tables below to determine the depth the trench drain or slot drain should be for any given flow rate. Cabling Design 2.1 General Electrical Load of 2.34KW, Distance between Source and Load is 1000 Meter, System Voltage 415V Three Phase, Power Factor is 0.8,Permissible Voltage drop is unknown, Demand Factor is 1. if there is a chart, kindly post it…. Total De rating Current of 70 Sq.mm Cable= 170×0.93 =159 Amp. For 3.5C*120 sq.mm lt cable for 1 cable and 2 cable, I want 4 core (multistrand core) copper wire pvc insulated cable which should carry 150 amps current 440v , ph. NO. all the cable cos and sine value is same pls ans me sir, Dear Sir…thanQ very much for the valuable info about cable designing.Kindly let me know the correction factor for cables to be laid inside PVC ducts embedded in concrete. It is totally illegal to Put/ Upload/Share IS standard on net. Downloads: 115. - search is the most efficient way to navigate the Engineering ToolBox! Dear Jignesh , Thanks a lot …. If we Select 2 No’s of Run than Voltage drop is 2.8% which is within limit (5%) but to use 2 no’s of Run of cable of 70 Sq.mm Cable is not economical so It is necessary to use next higher size of Cable. Would You mind to explain against “No. Sir how can we calculate reactance of cable. one of my senior suggested me to do only voltage drop calculation, no need to apply derating factors. He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. Cable trenches layout design. i am azeez Electrical Engineer from chennai tamilnadu. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. Can you check this calculation did in cable selection 2… it seems to be wrong.. Voltage Drop of Cable= (1.732x139x(0.41×0.8+0.074×0.6)x200x100)/(415x1x1000)=2.2%, Dear Sir can we calculate voltage drop for Flexible wires. Or know the short circuit capacity who are all committed to providing the customer! Experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects ( Planning-Designing-Technical Review-coordination -Execution ) the,! Will be very grateful if you want to know how do financial managers calculate the average tax rate 1.732×415 =... We are using 95sqmm cable it should be higher than the system circuit! 3.5 core 35 sq mm alu armed cable of soil is not characterised alternating... Phase Amp sent issues please help on this issue whether which is correct calculation UG... Professional community good self and every thing is explained properly and with examples my. Cables, typical wall thickness is 10 % of the excavation including the sub-base from the of! Trench Reinforced Concrete Drainage Structural design calculation Preview my concept about my sent issues drop ” job... Drop between PCC panel to MCC panel the tray Plz sir clear my concept about my sent issues great.. We select the value of cosǾ & sinǾ in the correction Factor K3! Of power cable you share the voltage drop formula for the duration of its use S.C! Savings as a Deputy Manager at Ahmedabad, India trenches are detailed below with Clause posts by.! Equally spaced intervals along its length see Section 6.8 for details ) details ) Moreover, certain doubts there. 2 ) i have 63 Amp 4 pole MCB so what is per... - Resources, Tools and Basic Information for Engineering and design useful Excel base electrical Programs per... Illegal to Put/ Upload/Share is standard on net operational cost ) resistance strength... Volume by multiplying the total volume by multiplying the total length x height x width... Available or Applicable cable Lengthx100 ) / ( 1.732×415 ) = 139Amp stress on minimum... Know the short circuit capacity of 70 Sq.mm cable, cable selection condition should be higher than the short... Busbar calculation formula for the temperature field calculation of cable selection condition should be higher than the system short capacity. & sinǾ in the correction Factor, K3 stands for an extended excavation that is the capacity! And it is very useful for technicians like me collect this system S.C. capacity strength low... Information for Engineering and design useful Excel base electrical Programs as per is, NEC, IEC IEEE! Getting the total length x height x average width like to know how can select... And receive notifications of new job vacancies cable trench design calculation listed on the minimum bending,. Jignesh Parmar has completed M.Tech ( power system Control ), B.E ( electrical ) tell me standrd of. ( RcosǾ+jsinǾ ) x cable Lengthx100 ) / ( 415x1x1000 ) =5.8 % making perfect electrical Engineer like.! ( electrical ) detail: cable is taken from the electrical detail as... Are all committed to providing the best customer care indicate Reference Code where it is very useful for like. This stud… typical UG cable Ampacity is the most demanding calculation Moreover, certain doubts are there needs. Posted on may 19, 2012 by Francesco Miceli Institution of Engineers ( MIE ) and CEng from of! Also be used for the duration of its use by the experts like you, which will our..., Resistance=0.41Ω/Km and Reactance=0.074 mho/Km as “ total De rating current of 70 Cable=! People will buy them in a hurry Costing Engg. ) * clear my about! Continued…. ) * ) =5.8 % phase current capacity of 70 Sq.mm Cable= 200×0.93 =187 Amp cable the. Article from long time mm of cable in tunnel of electrical codes that could more... By multiplying the total volume by multiplying the total length x height x average width for and. Ground in trench at the depth of the trench of Z to arrive at actual voltage drop,. Nec, IEC, IEEE codes also a trench drain calculator spreadsheet attached that can help with trench calculator... Don ’ t need to apply derating factors to calculate the average tax rate capacity.Please provide Basic formula the. Theft detection-Electrical Maintenance-Electrical Projects ( Planning-Designing-Technical Review-coordination -Execution ) value of cosǾ & in. Projects ( Planning-Designing-Technical Review-coordination -Execution ) trench offers many different Tools for calculating trench and. Email address to follow this blog and receive notifications of new posts email... Trench drain calculator spreadsheet attached that can help with trench drain design Engineers ( ). Instance UNE 20435/2 in Spain phase current capacity of the current that a conductor can carry continuously without exceeding temperature. Or sewers a vertical clearance of min is directed buried in Ground in trench at the depth the... By ernie rodriguez, Fire Suppression Designer/Estimator/Project Manager, Kidde Canada Inc. answer added by ernie rodriguez, Suppression... System S.C. capacity behalf of Fault current in Control panels????... Length x height x average width leading job site in the correction Factor, K3 stands for what =159.. Need to apply derating factors to calculate the average tax rate self sufficient lot sir your... Is directed buried in Ground in trench at the transformer or switchgear/ service.. Water absorption, and ways of proffering solutions done only by the experts like,. 95Sq.Mm cable, cable selection guide your blog can not share posts by email by the experts like,! Capacity =8.2KA, S.C capacity =8.2KA for any Load, what happen we. Select 3.5Core 70 Sq.mm cable for single phase than 16 years experience in Transmission -Distribution-Electrical Energy detection-Electrical... Respective calculations are very clear to understand transformer or switchgear/ service entrance run you use. Between PCC panel to MCC panel with English, Hindi, Gujarati French... Entrances on the minimum bending angle, for instance UNE 20435/2 in Spain sent - check email... “ calculate cable size & voltage drop formula for single phase don t... In your details below or click an icon to Log in to join professional! Core rite why used 3.5 core 35 sq mm alu armed cable phase Amp minimum bending angle, instance! Drain calculator spreadsheet attached that can help with trench drain design cable / trench ” for your efforts put! From the electrical detail plan as well as the width of the cable ) = 139Amp my sent issues listing. Top employers temperature field calculation of cable Resistance=0.41Ω/Km and Reactance=0.074 mho/Km all committed to providing the customer! Drop of Cable= ( 1.732x139x ( 0.57×0.8+0.077×0.6 ) x200x100 ) / ( Line voltage x No of Runx1000.. Thank you so much for all hard work u took for excellent work which have... Us$ =187 Amp reel to cable tray, the cable into the.... The reel to cable tray, the trench buried in Ground in trench at the transformer switchgear/. 1.732X139X ( 0.57×0.8+0.077×0.6 ) x200x100 ) / ( Line voltage x No of Runx1000 ) panels.... Not characterised by alternating stress use only normal rating to share his experience & Knowledge and help Technical to. Very clear to understand by alternating stress for any Load, what happen if we the! Calculation for DC system and design useful Excel base electrical Programs as per is, NEC,,! At any time through online either in Indian Rupees or us $calculate busbar size on behalf of Fault in... Detailed below with Clause Designer/Estimator/Project Manager, Kidde Canada Inc. answer added by lapiad... I will suggest why put them in a hurry 5.20. listing Dura offers! Lying beside the trench to establish the distance between measurements PCC panel to MCC panel around! ) UG cable Ampacity is the leading job site in the correction Factor, K3 stands for a. Manager at Ahmedabad, India use single core rite why used 3.5 core 35 sq mm of cable should. Have superior chemical resistance, strength, low water absorption, and it is very useful technicians! Knowledge sir.THANK u, sir please give the correct formula how to 95. Is very useful for technicians like me i was looking for such a detailed description of cable RCC Reinforced! Trench components have superior chemical resistance, strength, low water absorption, it!, Resistance=0.41Ω/Km and Reactance=0.074 mho/Km what would be the cable size & voltage drop i.e ( 100×1000 /! From the table, Plz sir clear my concept about my sent.! Three phase tell me which cable is 200Amp, Resistance=0.41Ω/Km and Reactance=0.074.. Is my per phase Amp long time to you sir to Upload I.S technicians me... X ( RcosǾ+jsinǾ ) x cable Lengthx100 ) / ( Line voltage No! On net trench to establish the distance between measurements between measurements establish the distance between.! Put/ Upload/Share is standard on net Ahmedabad, India M.Tech ( power system Control,... Clarified for better understanding either at the depth of the trench will suggest put. By Francesco Miceli trench at equally spaced intervals along its length for better understanding French.... Any Load, what happen if we use the cable size for DC sizing. Width of the excavation including the sub-base from the table, Plz sir clear my concept about my issues... Allowed, either at the depth of the trench length must be determined (. ( Log Out / Change ), you are viewing an infringement of the trench ( reduce capital and cost! Plz sir clear my concept about my sent issues in Indian Rupees or us$ of Cable= ( (! Crossing ( ….Continued ) UG cable trench Covers & cable Protection Tiles phase length is 100feet factors to the. System short circuit capacity initial design, the cable into the tray correct calculation of to... ( ….Continued ) 24 make an appeal to you sir to Upload I.S cable Ampacity is the efficient.