Household dual switch connection

Many people's houses have dual-control switches, such as you press the switch to open the bright lights at the door of the room, before going to bed, press the switch to close the bedside, do not need to turn off the lights and have to walk to the door there, so it is convenient and time-saving, but many people do not understand the dual-control switches there are several kinds of wiring, specifically how to connect, which wiring and the most convenient and most cost-effective, the following with you to explain it in detail.

The first method: dual-control switch circuit alternative wiring method

Dual-control switch circuit alternative wiring method means that the two switches are into the firewire, this method is very safe and secure. You can see it on the diagram, but in reality the application is relatively small, few people will be wired this way.

Alternative wiring up to the point:

1, dual-control switch line in a line must be connected to the middle terminal of the dual-control switch.

2, dual-control line requires a wire must be connected to the upper terminals of the two switches, but also in the middle of a line connected to one end of the lamp, but the other end of the lamp should be connected to the zero line.

3, because the two switches are required to access the fire wire (connected to the upper terminal), so also requires that can not be connected to the middle terminal.

This wiring method circuit wiring characteristics:

1, dual-control dedicated line there is a wire, and in the middle of the branch line connected to one end of the lamp.

2, the two switches together into the fire wire, and can only be connected to the upper terminal. This makes it so that when the light is on, the voltage at all three terminals of the two switches under the zero wire is 220v when measured with an electric pen, and the test pen will show red.

The second, traditional wiring method

This traditional wiring method is mentioned in middle school and high school physics books, and it is also more common to see this wiring method appearing in standard engineering drawings in general.

The third, alternative wire-saving method

In theory, this wiring method has some security problems, but the dual-control wiring in the home is still very commonly used to save money and labor. Because now the copper wire are much more expensive than before, so for plumbers this wiring method is the most convenient and money-saving.

Wiring points:

1, in the middle of the two dual-control switches on the post are each pulled a line and connected to the lights you want to control.

2, for the other two terminals of the switch, a section of the firewire, a section of the zero line, so that you can connect, the idea is very simple, a good quality of the switch will not be easy to short-circuit phenomenon.

But these three methods can not be used randomly, be sure to understand their own home wiring under the premise of the most suitable for the safest and most cost-effective dual-control switch connection.