ABSTRACT
To carry out and complete an electrical installation makes use of many forms of information and can be subdivided into two categories namely: functional and technical. Many different types of electrical drawing and diagram can be identified, which give relevant information for the installation, termination and connection of conductors: layout, schematic, block, wiring and circuit diagrams. When the installation is completed a set of drawings should be produced that indicate the final positions of all the electrical equipment. The groundwork people lay the foundations, the steel work is erected, the bricklayers build the walls, the carpenters put on the roof and only when the building is waterproof do the electricians and mechanical service trades begin to install the electrical and mechanical systems. There are many different people involved in an electrical installation project and the transfer of information to those persons will largely depend on their roles, experience, position and responsibility within the electrical company.
