DIN EN 50156-1:2005 Electrical equipment for furnaces and ancillary equipment - Part 1: Requirements for application design and installation; German version EN 50156-1:2004
2016DIN EN 50156-1:2016 Electrical equipment for furnaces and ancillary equipment - Part 1: Requirements for application design and installation; German version EN 50156-1:2015
2005DIN EN 50156-1:2005 Electrical equipment for furnaces and ancillary equipment - Part 1: Requirements for application design and installation; German version EN 50156-1:2004