International Standards Organizations
International norms and standards are voluntary documents that countries agree to establish through regulations and common criteria for the manufacture of goods, procedures and services, thereby guaranteeing the compatibility, safety and quality of products throughout the world. These standards are accepted by the public and private sectors, thereby facilitating commercial exchange.
These standardizations, in the electrical and electronic field, are developed to try to eliminate confusion and with good practices to facilitate knowledge, maintenance and commissioning of electrical services, devices and installations.
In the electrotechnical industry there are currently different regulations that specify the regulations that allow the schematic representation of electrical designs. These standards regulate the use of graphic symbols and the general rules of the alphanumeric system to be followed for the identification of electrical devices and the design of electrical and electronic circuits and assemblies.
Below we show the main international, regional and national standards organizations used in the graphic documentation of electrical and electronic symbols. The same country may have different regulations and these may be established by public and private bodies.
Main International Standards in Electrical and Electronic Symbology
IEC – International Electrotechnical Commission
IEC is an organization made up of 169 countries that prepares and publishes international standards for the energy sector, including all electrical and electronic technologies, devices and systems.
ISO – International Organization for Standardization
ISO is an independent and non-governmental international organization. Bring together experts to share knowledge and develop voluntary International Standards.
Other Standard Organizations in the world
BS – British Standards
NOM-NMX – Official Mexican Standard
The graphics on this website are primarily based on the International Standard IEC 61082, but there are also graphics of electrical symbols from other regional and national standards.
Here is a little history of electrical regulations and standards from the end of the 19th century to the second half of the 20th century