Take the quadruple switch as an example and connect it according to the instructions. Quadruple has 5 live wires, single zero wire and ***6 wires. Generally, home decoration is a five-wire system, that is, only four live wires and 1 zero wire are left on the ceiling, and the live wires enter at the switch, that is, one enters and four exits. Connect the four live wires of the switch to the heater 1, heater 2, fan and lighting, then loosen the terminal of the live wire of Yuba, change the lead-out wire to the zero terminal and tighten it. It turns out that the terminal of the live wire is actually to protect the fan from automatically running over 92℃, so there is no harm in removing the wire and it will not affect the normal use. The principle of five-way switch is the same as above, only 1 wire is added.