The three-phase four-wire socket is different from the ordinary socket in our life. I believe many people do not know that there is such a socket. The ordinary socket of the three-phase four-wire socket is still different, so the use is not the same. Today, Xiao Bian gives you what is the three-phase four-wire socket and the use method.

What is a three-phase four-wire socket

The three-phase four-wire socket does not mean that the three-phase four-wire system of the power distribution system, the three-phase four-wire four-wire system is A, B, C, N, that is, the three-phase power system (also called power system, 380V) Phase line (A, B, C) plus a neutral N.

How to use three-phase four-wire socket

There is no need to put 3 in the N position, only one is enough. Because the electromotive force of the three ABC lines is smaller than the electromotive force of a single phase. If you have 3 phases completely balanced, the current in N is 0. Then distribute the load as evenly as possible, taking into consideration the situation of simultaneous use. For example, Yuba and electric water heaters and plugs that are ready to plug in electric heaters try to walk three phases. For example, three air conditioners can be considered to be placed on the three phases, so that when they are opened together, there will be no single-phase overload. The key is to use a large load at the same time to pay attention to separate it. In addition, those sockets need to be attached behind the electric shock protector.

Three-phase four-wire socket precautions

1, pay attention to the three-phase balance, the load power of each phase is the same as possible, taking into account the socket and lighting separately;

2, air conditioning line can not go alone, according to the principle of three-phase balance need to walk alone to go;

3, try to avoid the zero line public, more short-circuit zero line prone to zero-line contact is bad, the total line is broken, the lower socket lighting will not be able to use.

4, the main line can use a slot. To prevent electric shock and short circuit. Pay attention to switch control fire line. The base of the lampholder is connected to the firewire. Do not mix ground and neutral wires.

The reason why the power of the three-phase four-wire socket is unstable

1. You took 2 lines from 3 phase power, 1 FireWire, 1 ground wire, and ground wire connected to virtual or unreliable. This will produce a voltage drop.

2. You took 2 lines, 3 Fire lines, 1 (ground line, or 0 line) from 3 phase electricity. Take too much load from the FireWire cable.

3, serious imbalance. It also generates a voltage drop. 3: You are too far away from wiring, it will also produce a voltage drop.

4. If your wiring is too small, it will also produce a voltage drop.

The above is what the Xiaobian fee brings us. What is the three-phase four-wire socket and how to use the three-phase four-wire socket ? We must learn to correctly use the three-phase four-wire socket and be responsible for the safety of ourselves and our family members. The importance of this is self-evident. I believe the above content will certainly help you, if you want to know other relevant information, please continue to pay attention to this site, more exciting so stay tuned!

Rebar Stirrup Bending Machine

GF20/GF20CNC/GF25CNC Automatic Rebar Stirrup Bending Machine can bend round steel bar with diameter to various geometrics shape as required by construction.

Main Features Of Rebar stirrup bending machine

1. Convenient use: perfect safety performance, standard angle, fast speed, light and 


2. Easy Operation: one man can operate it once switch on the power.

3. Convenient of range adjustment: for GF20 model, just need to shift induced magnet.

   for GF20 CNC and GF25CNC model, just need to press the button on operation panel

4.  We adopt two foot pedals: 90°and 135°, angle adjustment freely.  

5.  Fast Speed: rotate speed is 20-25 times/min (GF20), 25-30 times/min(GF25).

Automatic Rebar Stirrup Bending Machine004

Main Technical Parameter



3-380V-50HZ or others

3-380V-50HZ or others

3-380V-50HZ or others

Motor Model




Motor Power

2.2KW 2.2KW 3.0KW

Motor Speed

1440r/min 1440r/min 1440r/min

Bending Common Carbon Steel

Φ4 – Φ20

Φ4 – Φ20

Φ4 – Φ25

Bending Deformed Bar

Φ5 â€“ Φ16

Φ5 â€“ Φ16

Φ5 â€“ Φ20





Dimension (mm)(L*W*H)




Rebar Stirrup Bending Machine

Automation Rebar Stirrup Bending Machine,Hand Operated Rebar Bending Machine,Construction Material Rebar Bending Machine,Used Hydraulic Rebar Bending Machine


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