{"product_id":"electrical-installation-calculations-9781444324266","title":"Electrical Installation Calculations","description":"\u003cb\u003eBook Synopsis\u003c\/b\u003e\u003cbr\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 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\u003cbr\u003e\u003cbr\u003e\u003cb\u003eTrade Review\u003c\/b\u003e\u003cbr\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).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eTable of Contents\u003c\/b\u003e\u003cbr\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\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"John Wiley and Sons Ltd","offers":[{"title":"Default Title","offer_id":49408382042455,"sku":"9781444324266","price":42.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0817\/1739\/5799\/files\/9781444324266.jpg?v=1730502700","url":"https:\/\/bookcurl.com\/products\/electrical-installation-calculations-9781444324266","provider":"Book Curl","version":"1.0","type":"link"}