Madalpingelised elektripaigaldised. Osa 5-52, Elektriseadmete valik ja paigaldamine. Juhistikud = Low-voltage electrical installations. Part 5-52, Selection and erection of electrical equipment. Wiring systems (IEC 60364-5-52:2009/AMD1:2024)2025 https://www.ester.ee/record=b5734430*est