Any electrical wiring should be done by a qualified electrician. We are not electricians and have taken all the diagrams from the instructions that are supplied . Explanation and diagrams for wiring a one way light switch circuit using in line switch method. here we have a three way switching lighting circuit (sometimes called two way switching with intermediate). This allows a single light to be turned on or off from . Two way switching means having two or more switches in different locations to control one lamp. Full circuit diagrams and detailed illustrations (new harmonised . Jul 31, 2018 - 'Loop-in' (as per diagram above). The circuit is fed to each lamp fitting in turn, and a separate cable connects from the fitting to the switch. The earth wires have been omitted for clarity and would need to be connected at all switches and ceiling roses. The wires would also be covered by the .