The second paragraph, straight to the point. Generally speaking, the home circuit consists of incoming wire (also called power cord), electric energy meter, master switch, safety equipment, electrical appliances, sockets, wires and switches.
The power cord is divided into live wire and zero wire.
Connect the wire to the watt-hour meter first, and the switch of the knife is fused to prevent leakage. Fuses are generally made of lead-antimony alloy with high resistivity and low melting point, which can automatically fuse the circuit when the current is too large and should be connected in series in the circuit. Then you can connect home appliances; However, it should be noted that household appliances are connected in parallel. Because if one of the electrical appliances is broken, it will not affect the other electrical appliances, that is, the other electrical appliances can still work normally. There is a switch on the branch where each electrical appliance is located. Can control the on-off of the branch, and the switch should be connected in series with the controlled appliance. In domestic circuits, sockets are used to supply power to movable appliances. Sockets should be connected in parallel in the circuit, divided into fixed sockets and movable sockets, and the movable sockets are divided into two-hole sockets and three hole socket. Three hole socket standard socket is connected to the zero line on the left, the live wire on the right (left zero and right fire ground, original bear type), and the other hole is grounded, so that when the three-pin plug is inserted, the metal shell of the electrical appliance is grounded. Our domestic household circuit is 220v, which is different from other countries.
The third paragraph is about how to use household circuits correctly and matters needing attention. People's safe voltage is not higher than 36v. What can you write? Don't touch the fire line, don't go near the high-voltage charged body ... There are many things, all of which are common sense (put a few more words in this paragraph)
The last paragraph echoes the first. What electricity is good for people? Use electricity correctly, learn electricity well ...
Actually, Xiong Yang has already said that. ....................................................................................................................