VDE 0100-100-2009 Low-voltage electrical installations - Part 1: Fundamental principles@ assessment of general characteristics@ definitions (IEC 60364-1:2005@ modified); German implementation HD 60364-1:2008
VDE 0100-801-2015 Low-voltage electrical installations - Part 8-1: Energy efficiency (IEC 60364-8-1:2014@ modified); German implementation HD 60364-8-1:2015