1. Finnish Standards Association (SFS). [Low-voltage electrical installation and safety in electrical work. SFS 6002 Standard. Safety at electrical work. SFS handbook 600]. Helsinki: SFS; 2007. Standard No. SFS 6002:2007. Finnish.
2. European Committee for Electrotechnical Standardization (CENELEC). Operation of electrical installations. Standard. Brussels: CENELEC; 2005. Standard No. EN 50110-1:2005.
3. Directive 2013/35/EU of the European Parliament and of the Council of 26 June 2013 on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (electromagnetic fields) (20th individual Directive within the meaning of Article 16
4. (1) of Directive 89/391/EEC) and repealing Directive 2004/40/EC. OJ. 2013;L179:1-21.