In Electrical and Electronics Engineering, we use different types of drawings or diagrams to represent a certain electrical system or circuit. These electrical circuits are represented by lines to represent wires and symbols or icons to represent electrical and electronic components. It helps in better understanding the connection between different components. Electricians rely on electrical floor plan (which is also an electrical diagram) for doing any building wiring.

The main functions of electrical drawings are a plot plan showing the building’s location and outside electrical wiring.Floor plans showing the location of electrical systems on every floor.Power-riser diagrams showing panel boards.Control wiring diagrams.Schedules and other information in combination with construction drawings.

Diagrams are a prerequisite for methodical and rapid fault-finding. The process of elimination can be very time consuming and, on even slightly complicated equipment, the chances are that the electrician will unwittingly create more faults and compound the problem. This is a fact any experienced troubleshooter will confirm.

It is commonly accepted that the productivity of a new electrician will be very low during his initial months due to the need to acquire sufficient “plant knowledge”. This time can be reduced drastically if the electrician is presented with a comprehensive set of diagrams prepared specifically for the maintenance of the appropriate electrical plant (as opposed to diagrams prepared for the manufacture of equipment).