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I have a quick question regarding the above, just for interests sake.
The load wire gets cut and is input on terminal 1 and output on terminal 2. The neutral and earth are left alone then the load wire from terminal 2 rejoins the cable and it continues to the appliance that you want to power.
The cable running from the switch (STC-1000 for example) would just have the load going into terminal 3 and the neutral going into terminal 4.
As the switch turns on and off, this would allow terminals 1 and 2 to bridge.
Does this seem correct? If so what would happen to the earth wire from the cable coming out of the switch? Would it just run into a dead end?
Despite the diagrams saying this something in the back of my mind is saying that the switching wires (into terminals 3 and 4) is wrong.