GE 45613 GE Z-Wave 3-Way Dimmer Kit with Terminals - Manual (Page 11)

Single, Dual and Triple Gang Boxes
The metal plate surrounding the switch assembly is a heat
sink. The maximum load rating (600W) is provided when
installed in a single gang box with the full heat sink. Multiple
45612 dimmer switches may be installed in dual or triple
gang boxes and, if necessary, one or both sides of the heat
sink may be removed by bending it at the score lines. There
is a corresponding reduction in the switch’s load rating
when ganged. DO NOT exceed the following loads:
Dimmer Rating Number of Dimmers Heat Sink
600W One switch in a Single Gang Box Full
500W Two switches in a Double Gang Box One side
removed
400W Three switches in a Triple Gang Box Both sides
removed
Traveler
Black
(Load)
Black
(HOT)
Ground