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เนื้อหาย่อ : In preparing this book it has been the author's aim to make it simple enough for the beginner, yet complete enough so that it will be of value also to those already engaged in electrical work. It is intended to be, not a manual that merely recites the methods used in wiring buildings for the use of electricity, but rather a book that explains the subject in such fashion that the reader will learn both the way things are done and why they are done in that particular way. student master the subject so that he can solve his own problems as they Only in this manner can the in actual practice, for no book can possibly cover all the different problems that are likely to arise. Since this book is not intended to include the subject of electrical gineering, only so many basic engineering data as are essential have been included, and these so far ae possoble have been boiled down to ABC proportions. All methods shown are in strict accordance with the National Elec- trical Code, but no attempt has been made to include a detailed expla- nation of all subjects covered by the Code. The Code is written to in- clude any and all cases that might arise in wiring every type of structure