View Images Library Photos and Pictures. Diagram Electrical Switch Wiring Diagrams Full Version Hd Quality Wiring Diagrams Csiwiring Techdays Wpc2008 It How To Wire Water Heater With Two Switches Diagram 240 Volt Heater Wiring Diagram Full Version Hd Quality Wiring Diagram Manualwiring2 Divetech It How To Control Water Heater Using 1 2 3 4 Way Switches Im using schneider electrics vivace series kb31d20ne2 which is described as 20a 250v 1 gang 2 way double pole switch with neon and earth for both. Now by understanding the diagram above go up to the top diagram and by using the concept shown here just use your mouse pointer on that diagram and follow the flow from black wire hot wire to the load and return through the white wire neutral.