Light Switch Wiring L1 L2 L3 L4. This is cable c below one wire connects to l1 and the other to l2 on the top switch. These are typically labelled com l1 and l2 some may label the l1 and l2 positions as 1 way and 2 way.
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Used where three or more switches control the same lighting. This double switch is on the first floor landing. In one switch position the com terminal is connected to l1.
Again some makes of switch may have alternative markings such as l1 l2 and l3.
Used where three or more switches control the same lighting. Nb in light switches you are actually switching the live part of your circuit only so all of the cables except the earths even if they are different colours are actually part of the live not neutral. A two way light switch is a simple single pole changeover switch with three terminals. They have 4 terminals l1 l2 l3 l4.
