What is the building strong current project, what does the building strong current project include,

In the stage of decoration and hydropower, we often hear the words "strong electricity and weak electricity", so what is strong electricity? What are the precautions for strong current wiring? Poke**, 1 minute to understand the strong electricity! It is related to the safety of electricity after moving in, so you must see it

Conceptually speaking, strong electricity and weak electricity are generally easy to distinguish, and the main difference is the difference in use. Strong electricity is used as a power energy source, and weak electricity is used for information transmission. They are roughly as follows:

1) The frequency of communication is different.

The frequency of strong electricity is generally 50Hz (Hertz), called "power frequency", which means the frequency of industrial electricity: the frequency of weak electricity is often high frequency or ultra-high frequency, measured in khz (kilohertz) and MHz (megahertz).

2) The transmission mode is different.

Strong electricity is transmitted by transmission lines, and weak current is transmitted by wired and wireless. Radios transmit electromagnetic waves.

3) The power, voltage and current are different.

The strong current power is measured in KW (kilowatts), MW (megawatts), the voltage is measured in V (volts), kV (kilovolts), and the current is measured in A (amps) and KA (kiloamperes); The weak current power is measured in W (watts) and MW (milliwatts), the voltage is measured in V (volts) and MV (millivolts), and the current is measured in MA (milliamperes) and UA (microamps), so its circuits can be composed of printed circuits or integrated circuits.

There are also high-frequency (hundreds of kHz) and medium-frequency devices in strong electricity, but the voltage is higher and the current is also larger. Due to the development of modern technology, weak current has penetrated into the field of strong electricity, such as power electronic devices, wireless remote control, etc., but these can only be counted as the weak current control part of strong electricity, which is still different from the controlled strong current.

There are two main types of weak current in buildings: one is the safety voltage level and control voltage and other low-voltage electric energy stipulated by the state, which are divided into AC and DC, such as 24V DC control power supply, or emergency lighting backup power supply. The other type is information sources containing voice, images, data and other information, such as **, television, computer information.

In a narrow sense, the weak current of the building mainly refers to: security (monitoring, perimeter alarm, parking lot), fire protection (electrical part), building control, and network integrated wiring and audio system.

The concept of building strong electricity:

High voltage means that the voltage level is 1000V and above, that is, high voltage.

High voltage is mainly divided into three categories:

Power generation voltage: 6kv, 10kv, 15kv, etc.

Transmission voltage: 35kv, 110kv, 220kv, 380kv, 500kv, etc.

Area voltage: 6kv, 10kv, etc.

The concept of power system is: a unified whole of electric energy production, transmission, distribution and use composed of equipment for power generation, transmission, transformation, distribution and electricity consumption and corresponding auxiliary systems.

Strong electricity is lighting and power supply;

Weak current includes instrumentation and communication or control lines.

Strong electricity is the opposite of weak electricity.

Strong electricity is interpreted as: strong and high voltage current.

Weak current is interpreted as: weak low voltage current.

Strong electricity includes: various household circuits, industrial circuits, and so on.

Weak current includes: **, fire lines, monitoring lines and so on.

Weak current generally refers to DC circuits or audio lines, ** lines, network lines, ** lines and other signal lines, and the DC voltage is generally within 32V. Household appliances, computers, TV signal input (cable TV lines), audio equipment (output lines) and other electrical appliances are weak electrical equipment.

Strong current generally refers to the alternating current voltage above 24V. For example, the voltage of electric lights, sockets, etc. in the home is 110V 220V. Lighting fixtures, electric water heaters, heaters, refrigerators, televisions, air conditioners, audio equipment and other electrical appliances in household electrical appliances are all strong electrical equipment.

The strong current system includes: high and low voltage distribution system, distribution transformer, generator set, power cable, closed busbar.

1. Strong electricity is not equal to power electricity. Strong electricity is often used for power, such as motors, air conditioners, and elevators, but strong electricity is also used to power computers, televisions, and other equipment. Another example is that the power of an electric vehicle is a 12V battery, which cannot be called strong electricity.

2. It cannot be demarcated by frequency or AC and DC. For example, 800kV DC transmission must belong to strong electricity.

3. The current cannot be used to demarcate the boundary. The working current of many high-voltage equipment can be very small, but the communication power supply is low-voltage and high-current.

The general sequence should first review the drawings before the construction of strong electricity, and in the process of strong current construction, it should be noted that weak electricity and strong electricity should be separated to prevent the interaction between the two. The construction sequence of strong electricity is as follows: civil engineering embedded pipeline tray installation cable installation switch panel installation secondary wire wiring installation check whether the line number is correct power panel cabinet power on lighting panel power on lighting fixtures power on electrical equipment and electrical inspection and testing make various records and submit acceptance reports.

Building strong current engineering mainly includes: power supply and distribution system, low-voltage distribution box (cabinet), low-voltage cable laying, cable tray bus duct installation, electrical piping, wire and cable laying, lighting fixtures and switch socket panel installation, grounding device, lightning protection and grounding and other potential grounding safety, etc., the knowledge that needs to be mastered is the construction technology and standards of building electrical installation engineering, the current electrical installation engineering quality acceptance specifications, construction standard atlas, etc.

Landlord: Hello. Under normal circumstances, whether it is in the construction plan or in the commercial house, you will see two electrical boxes. One is strong electricity and the other is weak electricity.

The strong current box is connected to lighting electricity, household appliances, generally 220VWeak current refers to the connection of ** line, network cable, cable TV line, etc.