An introduction to the basic techniques and methods of different wiring systems used in the electrical installation industry. This is workshop based and involves working with a range of different wire and enclosure types. Applications of electrical science, motors, magnetism, single and polyphase power are all aspects of the electrical installation industry and understanding the working principles of these is a part of an electricians training. Circuit and installation calculations. An electrician must be able to calculate the way a circuit or an installation is going to operate before any wiring begins. This is to ensure the installation methods and circuit components are safe and will operate correctly both under normal running and fault conditions.