How to Wire a Two-Wire Household Switch?

1. The switch has only two terminals. This is a single switch. As long as it is connected in series to the live wire, the light bulb can be turned on or off.

2. The two contacts on the single-link switch rely on the spring to move the contact pieces to make the current on and off, which is also equivalent to the principle of setting up a suspension bridge over the river.

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