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While the very first edition of this handbook proved the most successful of the whole Portable Handbook series, being aimed at electrical technicians and engineers who are working in building electrical power systems, the present new release of this book has been necessitated by the very latest version of the NEC, i.e. National Electrical Code, rendering much of the existing material obsolete. This, in turn, necessitated about half of the book's content be re-written. The publication will definitely be very useful for any worker of the electrical industry since it contains so much valuable technical info plus recommendations provided from the equipment manufacturers, covering grounding issues and maintenance, fire protection systems and lighting, electrical motors etc. The text is supplemented with numerous charts and graphs for illustration. We would consider this publication a truly indispensable and handy reference source for all electrical engineers. Most part of the reference material in the handbook bases on the recognized engineering practices and classic methods. Some basic design calculations have also been included in this book. This is a quick-look-up working tool for the electricians which is intended to take the guesswork out of nearly any electrical design calculation and related task.