Norms & standards

Electrical engineers always need to be up to date about technical terms as well as the most recent rules, norms and standards - whether they just started working or already have years of experience. What do the standards DIN EN/IEC 61439 and DIN EN/IEC 60309 specify? Which IP protective types are there and what are their differences? What do the clock positions and colours of the plugs and sockets stand for? We have compiled important information and answers to the most common questions on our knowledge site: