Is the live wire below the zero line of the home 2p switch of the garage circuit property distribution box not generally thick?

If it is the switch of the lighting lamp, only the live wire is right, and the zero wire does not need to be switched on. The neutral wire is directly connected to the lamp. What you see in the switch box is a live wire. Divide it into two wires and connect them at both ends of the switch. When the switch is turned on, the current will be transmitted to the lamp through the live wire. And the zero line will be the same as turning on the light. The short circuit should be a short circuit in the lamp or a short circuit between the zero line and the live wire. If the light switch is turned on and then short-circuited, it is a problem near the light. If the whole lighting circuit fails to work, it will be more troublesome to check along the wiring. As for what you said, there is no zero line. If it happens in the distribution box at home, it is covered up by decoration. It is impossible without a zero line.