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International Standards Organizations

As today there is no single standard, the main international standards used in the graphic documentation of electrical symbols are shown below. These rules formalize the use of the graphic symbols and the general rules of the alphanumeric system to follow to identify devices, design circuit diagrams and assembly of electrical and electronic installations and devices.



Main International Standards in Electrical and Electronic Symbology

DIN – Deutsches Institut für Normung

German standardization institute. National standardization body of Germany based in Berlin. DIN is also interpreted with Deustches Industrie Norm Standardization for German industry.

ANSI – American National Standards Institute

Organization that oversees the development of standards for products, processes, services and systems in the US.

IEC – International Electrotechnical Commission

International standardization organization in the fields of electrical, electronic and related technologies.


More specifically the graphics of the electrical symbology is governed by the European standard EN 60617 approved by CENELEC (European Committee for Electrotechnical Standardization) under the International Standard IEC 61082.

The graphics on this website are mainly based on the international standard IEC 61082, but graphics of symbols of other American and European standards are also reflected, for example:

BS – British Standards

IEEE – Institute of Electrical and Electronics Engineers, internacional

ASM – American Standard Manual

NEMA – National Electrical Manufacturers Association, EEUU

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