Adapter Plates are required to mount the pattresses to recessed electrical wall boxes. They provide a secure installation without any screws or fixings being visible.
When selecting your Adapter Plate requirements, it is important to match the Adapter Plate to the wall box as follows:-
1 Gang Adapter Plates are necessary if you need to attach any pattress (i.e. Single, Double, Triple or Quadruple Pattress, except 90mm Round Oak Pattresses as these are too small to be mounted over wall boxes) to a standard 1 gang (single) wall box.
2 Gang Adapter Plates are necessary if you need to attach any pattress, except Single Pattresses (i.e. Double, Triple or Quadruple Pattresses. Single Pattresses are too small to be mounted over 2 gang wall boxes), to a standard 2 gang (double) wall box.
3 Gang Adapter Plates are not produced, as 3 gang wall boxes are extremely rare. If you do have a 3 gang wall box, they sometimes have screw lugs mounted across their width as well as their length. If so, a 1 Gang Adapter Plate can be used to mount a pattress across the width of the 3 gang wall box. Only Triple Pattresses are suitable for mounting over 3 gang wall boxes.