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
Boxes and enclosures for electrical accessories for household and similar fixed electrical installations—Part 22:Particular requirements for connecting boxes and enclosures
Boxes and enclosures for electrical accessories for household and similar fixed electrical installations—Part 23:Particular requirements for floor boxe and enclosures