|| Protection against electric shock. Live working
*Including tools for working with voltages
|| Electrical engineering in general
*Including voltages, general electrical terminology, electrical documentation, electrical tables, safety, fire hazard testing, etc.
*Electrical diagrams and charts, see 01.100.25
*Electrical power stations, see 27.100
*Electromagnetic compatibility, see 33.100
|| Electricity supply systems
*Including electric energy meters in buildings, emergency electrical supplies, etc.