Different type of plate of assembly exist :

Architrave : 1 switch (architrave box)

Architrave double : 2 switches (dubbel architrave box)

Simple : 1 ou 2 switche(s) (single specific box or single standard box)

Double : 2 switches (rectangular specific box)

Triple:  3 switches (rectangular specific box)

Quadruple : 4 switches (specific box)

Several grid plates can be combined enabling the mounting of more than 4 "Switches".