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Electrical symbols represent components in diagrams and schematics, but there is no global standard. Some organizations have established their own guides, while others use private codes. Lack of standardization can cause confusion. Symbols provide a clear visual overview and are used in technical documentation and academic settings.
An electrical symbol is a visual symbol that represents a particular type of electrical component in an electrical schematic or similar diagram. It can describe anything from a type of circuit to a wired connection. The diagram may also include reference designators, codes that refer to specific components, and may provide additional context through documentation accompanying the diagram. The person drawing the diagram can use these designations to limit confusion.
Electrical symbols are not globally standardized. There are some standard guides available for use, including some established by international organizations that encourage their members to use their schemes. Some advocates are also pushing for a universal global standard for the ease of use of electrical schematics in any environment. In other cases, electricians and other personnel working with electrical schematics may use their own system of reference, which may be associated with a specific organization, company, or internal and private code.
Many symbols can be seen in multiple standards because they are relatively obvious, while others can be more variable. Lack of standardization can be a problem if people communicate across organizational barriers, as a diagram may be unclear or confusing due to the electrical symbols it uses. In some cases, a diagram of electrical symbols may accompany a diagram for the benefit of readers, or the diagram will indicate which system it uses to allow people to check references if they are unsure of the meaning of an electrical symbol.
Using an electrical symbol in a diagram provides an easy way to arrange information clearly and visually. It can be difficult to describe complex systems verbally, and a simple drawing or photograph may obscure important information. The diagram, with symbols to represent key components, provides a clear visual overview and ample information for anyone who may need to build, repair or work on an electrical system. Such diagrams can appear in technical documentation, patents, and other documents relating to an electronic product.
It is also possible to see electrical symbols being used in an academic setting. When students work with electrical schematics, their instructors can pose problems to solve or ask them to develop a schematic to describe a system or answer a prompt. Students should be sure to use the instructor’s preferred standard, unless they have a compelling reason to adopt an electrical symbol from another source, in which case they may wish to discuss the issue before turning in the work.
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