Introduction to mechanical design. Regulations. Designing mechanical components. Methods, views, sections, dimensions, bolts, nuts, threads, applications. Electrical designing. General meanings and knowledge. Regulations. Conductors, cables, tubes, interior electrical installations (IEI) switch boards. IEI switches - fuses themes , classification, usage, calculations, designing. IEI studies, calculations-design. Methods, IEI circuits, house IEI, calculations, study. Electrical machines. Transformers. Electric power conveyance and distribution systems. Rectifiers. DC and AC motor circuits. Transformer and sub-station circuits. Rectifier circuits