Environmental Engineering (EE) - Earthing and bonding of 400 VDC data and telecom (ICT) equipment (Endorsement of the English version EN 301 605 V1.1.1 (2013-10) as German standard)
Edition 2014-03

Wireless Industrial Applications (WIA) - Equipment operating in the 5 725 MHz to 5 875 MHz frequency range with power levels ranging up to 400 mW - Harmonised Standard for access to radio spectrum (Endorsement of the English version EN 303 258 V1.1.1 (2020-04) as a German standard)
Edition 2020-06

Ergonomics of human-system interaction - Part 400: Principles and requirements for physical input devices (ISO 9241-400:2007); German version EN ISO 9241-400:2007
Edition 2007-05

Tests on oil-filled (fluid-filled), paper- and polypropylene paper laminate-insulated, metal-sheathed cables and accessories for alternating voltages up to and including 400 kV (Uₘ=420 kV); German version HD 633 S1 Parts 1 and 3D:1997
Edition 1999-05

Plugs and socket-outlets up to 400 V 25 A; flat non-wirable two pole plugs, 2,5 A 250 V, with cord, for the connection of class-II-equipment for household and similar purposes; german version EN 50075:1990
Edition 1992-05

Residual current operated circuit-breakers type B without integral overcurrent protection to operate at residual alternating and residual direct currents - Part 400: RCCB Type B+
Edition 2023-04

Residual current operated circuit-breakers type B without integral overcurrent protection to operate at residual alternating and residual direct currents for advanced preventative protection against fire - Part 400: RCCB Type B+
Edition 2012-05

Road traffic signal systems - Part 400: Traffic Management Systems
Edition 2016-10

Seal for manhole covers 400 × 600 and 350 × 650
Edition 2006-10

Electrical systems for land vehicles - Part 10: AC Networks, 115/200 V, 400 Hz, three-phases, technical specification; text in German and English
Edition 2007-12