The basics of electrical systems drawing are the following:
Electrical drawings are technical drawings that show information about power, lighting, and communication for an engineering or architectural project. They use lines, symbols, dimensions, and notations to convey the electrical design to the workers who install or repair the electrical systems.
Electrical drawings can be single-line or multi-sheet drawings, depending on the complexity and type of the electrical devices. They are mostly diagrammatic and drawn to a scale that matches the floor plans, except for the electrical symbols, which are enlarged to be easily recognized.
Electrical drawings can include different types of documents, such as plot plans, floor plans, power-riser diagrams, single-line diagrams, general arrangement diagrams, control wiring diagrams, schedules, and other details. They can also use different types of software tools, such as AutoCAD, EdrawMax, or others.
Electrical drawings require knowledge of the electrical symbols and standards used to represent the components and connections in an electrical system. Some of the common symbols are lights, switches, fuses, ground, wires, resistors, capacitors, power sources, etc. The standards may vary depending on the country or region of the project.
Types of electrical drawings:
There are many types of electrical drawings, depending on the purpose and level of detail required. Some of the common types are:
Block diagram: simplified representation of a complex system using blocks and lines to show the main components and their relation.
Schematic diagram: detailed representation of an electrical circuit using symbols and lines to show the components and connections.
Single-line diagram: simplified representation of an electrical circuit using a single line and symbols to show the main components and connections.
Wiring diagram: detailed representation of the physical layout and connection of wires and components in an electrical system.
Pictorial diagram: realistic representation of an electrical system using images or icons of the components and wires.
Electrical floor plan: representation of the location and arrangement of electrical systems on a floor or building.
Ladder diagram: representation of an electrical circuit using horizontal lines (rails) and vertical lines (rungs) to show the components and logic.
Logic diagram: representation of an electrical circuit using symbols and lines to show the logic operations and functions.
Riser diagram: representation of the vertical distribution of electrical systems in a building or structure.
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