Preface

This Textbook is intended for all trainees in the field of electrotechnology. It contains the more important circuit diagrams and formulas and a limited number of selected tables of direct-current and alternating-current engineering.

With the help of this Textbook, the trainee will be in a position to read and interpret electrical wiring and circuit diagrams in order to perform his job according to the rules of good workmanship. At the same time, the trainee is encouraged to prepare and draw circuit diagrams without assistance and to use graphical symbols correctly.