Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 21: Particular requirements for boxes and enclosures with provision for suspension means (IEC 60670-21:2004, modified + A1:2016); German version EN 60670-21:2007 + A1:2023 + A11:2023
Cover plates and cover tapes for the protection and location warning of buried cables or buried conduits in underground installations; German version EN 50520:2020 + A1:2021