The search for a is a sign of a professional who wants to do the job right. While free, pirated versions exist on file-sharing sites and obscure forums, they are universally out-of-date, illegal, and potentially deadly.
Please be aware that . The standards are protected by copyright and are published by VDE-Verlag. Any illegal copies circulating on the internet are out of date (often from 1973 or older) and do not reflect the current safety requirements of the revised parts. The use of such illegal copies in official projects can have serious legal and liability consequences.