The questions of calculation of electric illumination, construction of charts of power supply of workshops, calculation of the electric loading, currents of short circuit, choice of transformers, cable busses and шинопроводов of electrical equipment are expounded. Calculations over of relay defence are brought, protecting from monophase earth-faults, overstrains, зануления and grounding of электроустановок. Certificate-informative materials are given. It is intended for students of institutions of higher learning, student to direction of preparation (specialities) "Mountain business" (specialization is "Electrification and mountain computer-aided manufacturing"), and also it can be useful to technical and engineering employees of workshops of washeries, designers of electrical equipment.