[. . . ] [. . . ] Wiring Diagrams One-way switching Common L N L1 Lamp/s Two-way switching Common L2 Two-way switches L2 Common L N L1 L1 Lamp/s Dotted lines show alternative switch positions Two-way switching 3 wire control Common L2 Two-way switches L1 Common SW. L N Lamp/s L1 L2 L Dotted lines show alternative switch positions Two-way plus intermediate switching Common Two-way L2 switch L1 L2 Intermediate switch L1 Common Two-way L2 switch L N Lamp/s L1 Dotted lines show alternative switch positions Two-way plus intermediate switching 3 wire control Common L1 L1 Two-way L2 switch L2 Intermediate switch L1 Common Two-way L2 switch SW. L N Lamp/s L Dotted lines show alternative switch positions [. . . ] [. . . ]