The circuit breaker can protect the home line, once the home line failure, the circuit breaker can automatically trip, thereby reducing the accident loss, it can be said that the circuit breaker is the necessary electrical appliances in the home, but how should the circuit breaker be connected?

If you want to know how to connect the circuit breaker, first to understand the name of some circuit breakers or types, in life is not often heard 1P, 2P or 1P+N, of course, there are 3P, 4P, what is the meaning of it? In fact, the number in front of P is the meaning of the circuit breaker can control the number of lines, such as 1P can only control a line on and off, when the line short circuit, the circuit breaker automatically trip, disconnect the fire line (can only disconnect a line). While 2P can control the on-off of two lines, or suppose that when the line short circuit occurs, the circuit breaker can trip automatically, but 2P can disconnect two lines at the same time, the zero line can disconnect the fire line.

Similarly, 3P is said to be able to control the on-off of three lines, generally in the 380V three-phase motor can be used. Some friends may ask what is the difference between 2P and 1P+N. N is usually the zero line, while 1P can only control the opening and closing of one line, so when a short circuit occurs, the zero line of 2P can be disconnected, but the one of 1P+N cannot be disconnected.

How should the circuit breaker be connected? Can let the circuit breaker on himself, with our 2 p circuit breaker as an example, like the image below, the above two terminal is commonly said into the terminal, the following two terminal said outlet end, because this is a 2 p circuit breaker, so it can control the two lines on and off, mark in the side of the terminal have capital letters N means the terminal to the zero line, The other is the fire line.

Actually like it says power circuit breaker is generally a lot (for used in household electric power), in order to secure general in the back of the line a few will be added to the 1 p circuit breaker, the breaker power is compared commonly small, in order to look more intuitive I found a picture on the Internet, for 1 p circuit breaker, directly connect a wire from the 2 p circuit breaker is ok, Just like the right side of the three circuit breakers in the figure below, of course, for 2P can continue to connect a fire line a zero line, if there is no N symbol on the circuit breaker, generally in accordance with the left fire right zero to connect, this and the socket is just the opposite, the standard connection method on the socket is left zero right fire.