The increase in the activity of the ESČ testing facility in the post-war period was largely due to the Ministry of Industry Decree of October 1945 on compulsory checking and testing of electrical products. It thus became necessary for the testing facility to expand its testing equipment and ensure new work organization. The buildings of the former Pomological Institute in Prague – Troja, where an aviation instrument plant had been based until then, were purchased in June 1947 as the testing facility’s new base. The laboratories have remained at this location to this day.