2 Way Lighting Diagram Uk. 3 way light switching new cable colours 3 way light switch old cable colours. 2 way switching means having two or more switches in different locations to control one lamp they are wired so that operation of either switch will control the light.
Whether it is the switching of a light from two different places inside a domestic dwelling or switching a series of lights in a commercial environment two way lighting circuits provide a cost effective and easy solution. For simplicity the earth wire is not shown in the above diagram. Say we are working on the light upstairs so we turn off the upstairs lighting circuit thinking we are safe wrong the live is picked up downstairs and there are still live conductors feeding the switch upstairs and if someone flipped the downstairs switch in this diagram that live feed would extend all the way to the lamp too you re fried.
This arrangement is often found in stairways with one switch upstairs and one switch downstairs or in long hallways with a switch at either end.
Say we are working on the light upstairs so we turn off the upstairs lighting circuit thinking we are safe wrong the live is picked up downstairs and there are still live conductors feeding the switch upstairs and if someone flipped the downstairs switch in this diagram that live feed would extend all the way to the lamp too you re fried. In position 1 when the switch is down or on com and l1 are connected together just like the one way switch. Two way switching is the most common requirement for many household and commercial lighting solutions. The first reason this is bad is on safety grounds.
