graphic symbols used in wiring diagrams (according to CEN standards)
Reading time:contacts and switches
select switches
control units
transformaters
motors
indicators and appliances
electrical standardisation
In each country, electrical equipment is governed by a range of standards including :
- UTE (Union technique des electricians = Technical Electricians Union) in France;
- CEN (Comité européen de normalisation = European standardization committee);
- IEC (International Electrotechnical Commission) or CEI (Commission électrotechnique internationale);
- VDE (Verband Deutscher Electro‑techniker Germany);
- BS (British Standards);
- CEI (Comitato Elettrotecnico Italiano);
- NEMA (National Electrical Manufacturers Association);
- ANSI (American National Standards Institute).