Wall switch installation steps:
1, should first recognize the home power wiring, in accordance with the provisions of our country, red, green and yellow, respectively, represents the three-phase line of fire, blue on behalf of the zero line (neutral line), yellow and green color for the ground line (protection line ).

2, according to the function of the wall switch corresponding wiring, electrical phase sequence is left and right on the ground.

3, need to pay attention to is that the ground wire must not receive the line of fire or zero line, will lead to security incidents, and the line of fire and zero line can be used, but there are security risks.

Wall switch installation of the three wiring methods
1, fast wiring: the line will be stripped directly into the wiring hole can be completed wiring, do not need to use the screw card to take power switch knife and other tools. The wiring hole inside a reed, the reverse will be pulled out by the card owner, one-way insertion is more convenient, need to plug the office socket stitches or pressure removed by the board to pull out the line.

2, double plate pressure line: that is, by small screws to tighten the two small pieces of metal, so that between the metal pieces of the wire is tightened. Double plate pressure line in the single line when the effect is good, but if at the same time then two different diameter of the wire, but also not damage the wire, a thin is easy to loose.

3, screw pressure line: that is, screw screw into the terminal, squeeze the wire and then docking and docking firm. The biggest advantage of the screw line is that the wiring is convenient, reliable, not easy to tripping. The disadvantage is that the screw will be crushed or even broken wire, a long time may make the wire heat or even fire, causing security risks.