{"product_id":"electrical-installation-calculations-isbn-9781444324266","title":"Electrical Installation Calculations","description":"Manual calculations are still extensively used and in particular are necessary for checking and verifying various software calculation design packages. It is highly recommended that users of such software familiarise themselves with the rudiments of these calculations prior to using the software packages.\u003cbr\u003e \u003cbr\u003e   \u003cp\u003eThis essential book fills the gap between software and manual calculations. It provides the reader with all the necessary tools to enable accurate calculations of circuit designs. Rather than complex equations, this book uses extensive worked examples to make understanding the calculations simpler. The focus on worked examples furnishes the reader with the knowledge to carry out the necessary checks to electrical cable sizing software programmes.\u003c\/p\u003e \u003cp\u003eOther key features include:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eUpdated information on 230 volt references and voltage drop under normal load conditions\u003c\/li\u003e \u003cli\u003eNew sections on buried cables that take into account soil thermal conductivity, trenches and grouping, allowing readers to carry out accurate cables sizing\u003c\/li\u003e \u003cli\u003eInformation and examples of steel wired armour cables, new to this edition. This includes sufficiency during short circuits and, for cables with externally run CPCs, gives unique fault conditions.\u003c\/li\u003e \u003cli\u003eCovers calculations of cross-sectional areas of circuit live conductors\u003c\/li\u003e \u003cli\u003eEarth fault loop impedances\u003c\/li\u003e \u003cli\u003eProtective conductor cross-sectional areas and short circuit conditions\u003c\/li\u003e \u003cli\u003eShort circuit protection.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThe last chapter combines all of the calculations of the previous chapters to enable the reader to complete an accurate design of an installation circuit under all conditions.\u003c\/p\u003e \u003cp\u003eA unique tool for detailed electrical installation trade, \u003ci\u003eElectrical Installation Calculations, Fourth Edition\u003c\/i\u003e is invaluable to electricians, electrical designers, installers, technicians, contractors, and plant engineers. Senior electrical engineering students and technical colleges, junior engineers, and contracts managers will also find this text useful.\u003c\/p\u003e \u003cp\u003eAbout the authors vii\u003c\/p\u003e \u003cp\u003ePreface ix\u003c\/p\u003e \u003cp\u003eAcknowledgements xi\u003c\/p\u003e \u003cp\u003eSymbols xiii\u003c\/p\u003e \u003cp\u003eDefinitions xv\u003c\/p\u003e \u003cp\u003e\u003cb\u003e1 Calculation of the cross-sectional areas of circuit live conductors 1\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eGeneral circuits 4\u003c\/p\u003e \u003cp\u003eCircuits in thermally insulating walls 5\u003c\/p\u003e \u003cp\u003eCircuits totally surrounded by thermally insulating material 6\u003c\/p\u003e \u003cp\u003eCircuits in varying external influences and installation conditions 6\u003c\/p\u003e \u003cp\u003eCircuits in ventilated trenches 8\u003c\/p\u003e \u003cp\u003eCircuits using mineral-insulated cables 9\u003c\/p\u003e \u003cp\u003eCircuits on perforated metal cable trays 10\u003c\/p\u003e \u003cp\u003eCircuits in enclosed trenches 11\u003c\/p\u003e \u003cp\u003eCircuits buried in the ground 14\u003c\/p\u003e \u003cp\u003eGrouped circuits not liable to simultaneous overload 18\u003c\/p\u003e \u003cp\u003eCircuits in low ambient temperatures 24\u003c\/p\u003e \u003cp\u003eGrouped ring circuits 26\u003c\/p\u003e \u003cp\u003eMotor circuits subject to frequent stopping and starting 27\u003c\/p\u003e \u003cp\u003eCircuits for star-delta starting of motors 29\u003c\/p\u003e \u003cp\u003eChange of parameters of already installed circuits 30\u003c\/p\u003e \u003cp\u003eAdmixtures of cable sizes in enclosures 33\u003c\/p\u003e \u003cp\u003eGrouping of cables having different insulation 39\u003c\/p\u003e \u003cp\u003e\u003cb\u003e2 Calculation of voltage drop under normal load conditions 40\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe simple approach 40\u003c\/p\u003e \u003cp\u003eThe more accurate approach taking account of conductor operating temperature 43\u003c\/p\u003e \u003cp\u003eThe more accurate approach taking account of load power factor 55\u003c\/p\u003e \u003cp\u003eThe more accurate approach taking account of both conductor operating temperature and load power factor 58\u003c\/p\u003e \u003cp\u003eVoltage drop in ring circuits 59\u003c\/p\u003e \u003cp\u003eVoltage drop in ELV circuits 62\u003c\/p\u003e \u003cp\u003e\u003cb\u003e3 Calculation of earth fault loop impedance 65\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe simple approach 70\u003c\/p\u003e \u003cp\u003eThe more accurate approach taking account of conductor temperature 75\u003c\/p\u003e \u003cp\u003eCalculations taking account of transformer impedance 81\u003c\/p\u003e \u003cp\u003eCalculations concerning circuits fed from sub-distribution boards 82\u003c\/p\u003e \u003cp\u003eCalculations where conduit or trunking is used as the protective conductor 87\u003c\/p\u003e \u003cp\u003eCalculations where cable armouring is used as the protective conductor 94\u003c\/p\u003e \u003cp\u003e\u003cb\u003e4 Calculations concerning protective conductor cross-sectional area 101\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eCalculations when the protective device is a fuse 104\u003c\/p\u003e \u003cp\u003eCalculations when an external cpc is in parallel with the armour 111\u003c\/p\u003e \u003cp\u003eCalculations when the protective device is an mcb 113\u003c\/p\u003e \u003cp\u003eCalculations when the protective device is an RCD or RCBO 119\u003c\/p\u003e \u003cp\u003e\u003cb\u003e5 Calculations related to short circuit conditions 126\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003ea.c. single-phase circuits 127\u003c\/p\u003e \u003cp\u003eThe more rigorous method for a.c. single-phase circuits 135\u003c\/p\u003e \u003cp\u003ea.c. three-phase circuits 141\u003c\/p\u003e \u003cp\u003e\u003cb\u003e6 Combined examples 153\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eAppendix: The touch voltage concept 175\u003c\/p\u003e \u003cp\u003eIndex 189\u003c\/p\u003e \"This essential book fills the gap between software and manual calculations. It provides the reader with all the necessary tools to enable accurate calculations of circuit designs. Rather than complex equations, this book uses extensive worked examples to make understanding the calculations simpler.\" (Broadcastnewsroom, 20 October 2010). \u003cp\u003e\u003cb\u003eProfessor Mark Coates, ERA Technology Ltd, Surrey, UK\u003c\/b\u003e\u003cbr\u003eProfessor Coates is an internationally renowned expert on current ratings for high and low voltage cable systems. He joined ERA Technology in 1983 and is currently Head of Cables at ERA's Engineering Consultancy business. His areas of expertise include measurement of the thermal properties of cable materials, calculation of heat flow through complex thermal paths, MV partial discharge, breakdown testing and life prediction using statistical analysis. He has been one of the leading contributors to the work of IEC Technical Committee 20 (Electric Cables).\u003cbr\u003e Professor Coates is an active member of the IEE\/BSI Committee concerned with electrical installations, BS7671. Before joining ERA, he spent several years as a plant engineer in the chemical and textile industry.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eMr Brian D. Jenkins\u003c\/b\u003e, (deceased), formerly British Standards Institution\u003c\/p\u003e  \u003cp\u003e\u003cb\u003eElectrical Installation Calculations for Compliance with BS 7671:2008\u003c\/b\u003e \u003c\/p\u003e\u003cp\u003eFOURTH EDITION \u003c\/p\u003e\u003cp\u003eManual calculations are still extensively used and in particular are necessary for checking and verifying various software calculation design packages. It is highly recommended that users of such software familiarise themselves with the rudiments of these calculations prior to using these software packages. \u003c\/p\u003e\u003cp\u003eThis essential book fi lls the gap between software and manual calculations. It provides the reader with all the necessary tools to enable accurate calculations of circuit designs. Rather than complex equations, this book uses extensive worked examples to make understanding the calculations simpler. The focus on worked examples furnishes the reader with the knowledge to carry out the necessary checks to electrical cable sizing software programmes. \u003c\/p\u003e\u003cp\u003eOther key features include: \u003c\/p\u003e\u003cul\u003e \u003cli\u003eUpdated information on 230 volt references and voltage drop under normal load conditions\u003c\/li\u003e \u003cli\u003eNew sections on buried cables that take into account soil thermal conductivity, trenches and grouping, allowing readers to carry out accurate cables sizing\u003c\/li\u003e \u003cli\u003eInformation and examples of steel wired armour cables, new to this edition. This includes suffi ciency during short circuits and, for cables with externally run CPCs, gives unique fault conditions.\u003c\/li\u003e \u003cli\u003eCovers calculations of cross-sectional areas of circuit live conductors\u003c\/li\u003e \u003cli\u003eEarth fault loop impedances\u003c\/li\u003e \u003cli\u003eProtective conductor cross-sectional areas and short circuit conditions\u003c\/li\u003e \u003cli\u003eShort circuit protection\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003eThe last chapter combines all of the calculations of the previous chapters to enable the reader to complete an accurate design of an installation circuit under all conditions. \u003c\/p\u003e\u003cp\u003eA unique tool for the electrical installation trade, this extensively updated fourth edition is invaluable to electricians, electrical designers, installers, technicians, contractors, and plant engineers. Senior electrical engineering students, technical colleges, junior engineers, and contracts managers will also find this text useful.\u003c\/p\u003e","brand":"Wiley-Blackwell","offers":[{"title":"Default Title","offer_id":47989111587045,"sku":"NP9781444324266","price":59.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1842\/7735\/files\/9781444324266.jpg?v=1761782842","url":"https:\/\/k12savings.com\/products\/electrical-installation-calculations-isbn-9781444324266","provider":"K12savings","version":"1.0","type":"link"}