Is there electricity on the network cable? Is there electricity on the network cable?

I came to this question is the most suitable, I used to think so when I was not decorated, so I asked the salesman when I was decorating, he told that the network cable is electric, some are electrical signals for communication, and some are for the equipment to supply power, such as the network cable connected by some equipment of Cisco, which can provide up to 24V direct current, these network cables even if the other end is not connected to the equipment to form a path, will periodically try to power on, the other end of the detection, Now the most common network cable is twisted pair, there are 4 pairs of 8 cores in a network cable, and the cores are twisted together to effectively shield electromagnetic radiation. The core is made of copper alloy, and generally speaking, the softer the wire, the higher the copper content used, and the better the performance of the wire. On the outside of each copper wire core is an insulating rubber sheet.

The outside of the 8 pairs of cores is wrapped with a thick layer of rubber to protect the cores inside. I'm glad for you, I hope you can help you, think I'm good and give it a thumbs up, thank you.

2. The general network cable is used in the five types of wires, and the network cable transmits only electrical signals, and the voltage is very low, which is absolutely safe below the safe voltage value.

3. The safety voltage value is 36V, which is the critical value of the safety voltage and will not cause harm to the human body.

There is electricity, but there is no electricity.

OK.

1. There are three common network cables in LAN: twisted pair, coaxial cable, and optical cable.

2. The version of the coaxial cable is made of.

The right layer of insulated wire wraps the cable of the copper conductor. It is characterized by good anti-interference ability, stable transmission data, and it can be used as a power supply.

3. The coaxial cable is used to connect with the BNC head, and the coaxial cable sold on the market is generally a finished product that has been connected to the BNC head, and you can choose it directly.

OK. The network cable bai can generally be used as a power cord du, but it must be.

If it is an oxygen-free copper eight-core internal network cable. The capacity of the eight-core network cable skin and the inner layer of oxygen-free copper wire skin are ***, and there is basically no problem with connecting the monitoring power supply.

The network cable between the home router and the computer is generally not longer than 50 meters, but the network cable length from the hub (switch) of the residential building to each residential unit is 100 meters, and the network cable more than 90 meters will cause the network signal to attenuate, and the interference along the road will increase, making the transmission data prone to errors, thus causing the feeling of slow network speed.

The network cable can be used as a power line for low-voltage line copying, and the current should not be too large, mainly for the following reasons:

The network cable is not designed for power lines, so the insulation is not suitable for transmitting high voltage (such as mains) and is not a problem to use within the safe voltage range (48V).

Depending on the type of network cable, the core material of the network cable varies greatly, some are pure copper, and some are copper-plated, so the current capacity is also different and very limited.

As a kind of data transmission cable, the cable is obviously different, if it is used for mains transmission, it will bring danger to other maintenance personnel, and the electromagnetic interference generated will also affect the data transmission of other network cables.

In general, only four of the network cables are used for data transmission. Therefore, you can use the unused wire as the power source. It should be noted that the voltage should not exceed 24 volts, and should not be used at long distances.

It is still able to guarantee the transmission effect. It is recommended to refer to professional information for details. If the wiring is wrong.

It can cause electrical appliances to burn out.

The network cable can be used as a ** wire, but it must not be used as a power cable, and the insulation level is not enough.

Yes, small currents do, I've used them.

Low current low voltage 6V estimated line 12V 24 car is not possible.

No, the network cable can only do data transmission.

There is electricity on the network cable. However, the current is weak and does not cause much harm to the human body. Generally, the network cable uses five types of cables, and the network cable transmits only electrical signals, and the voltage is extremely low.

Category 5 line (data communication line) is a kind of multi-line cable that transmits data, voice and other information and communication services, and is widely used in broadband access projects such as broadband user resident networks.

Ethernet cables, made of metal or glass, can be used to transmit information within the network. There are three commonly used network cables: twisted pair, coax, and fiber optic cables. A twisted pair is a data transmission line that consists of many pairs of wires.

A network cable is a connection cable that connects a computer to a computer, and a computer to other network devices. Commonly used network cables are twisted pair cables and coaxial thin cables. Network connectivity is simple with thin coaxial cables.

A twisted pair consists of four stranded copper wires coated with insulating material and encased in an insulating sheath. It reduces interference caused by clutter and suppresses the attenuation of signals within the cable.

Operating environment

Brand model: general

System version: General

The cable plugged into the LAN port of the network card behind the desktop computer host is the network cable, as shown in the red box in the following figure

A network cable is essential for connecting to a local area network. The common network cables in the LAN mainly include twisted pair and coaxial cables.

There are three types of optical cables. A twisted pair is a data transmission line that consists of many pairs of wires.

It is characterized by being cheap, so it is widely used, such as our common **line. It is used to connect to the RJ45 head.

Classification of network cables:

Class I cable: mainly used for transmitting voice (a class of standards are mainly used for ** cables before the early eighties), which is different from data transmission and has been eliminated by the standard.

Class II line: The transmission bandwidth is 1MHz, which is used for voice transmission and data transmission with a maximum transmission rate of 4Mbps, which is common in the old token ring that uses the 4Mbps standard token passing protocol, and has been eliminated by the standard.

Category 3 cable: The transmission bandwidth of the cable is 16MHz, which is used for voice transmission and data transmission with a maximum transmission rate of 10Mbps is mainly used for 10BASE--T, which is used by ANSI as the lowest use level.

No, the maximum power supply is +12V and the minimum is -12V.

After the 220V mains is input, it is first filtered by the low-pass filter and rectified by the bridge rectifier to become a 300V DC peak high voltage, which is sent to the pulse width modulator and conversion oscillator (power conversion line) by Wuling to become a 300V rectangular wave or sine wave, and then through the high-frequency voltage transformation and rectification filtering, it can output a DC stable voltage of +12V and +5V, which can be used by the cavity system.

The power supply adopts the feedback regulation working principle of adjusting the width ratio of the 300V rectangular wave to adjust the DC output value, and adopts direct rectification, high-frequency conversion and pulse width modulation technology, thus omitting the bulky transformer, and has the characteristics of small size, light weight, high efficiency and overcurrent and overvoltage protection.

Ordinary switches and routers have no power supply, unless they are switches with PoE power supply, they are generally powered by blue wires with DC12V.

PoE power supply refers to a switch that can provide network power supply to remote power receiving terminals through network cables, including network switch and PoE power supply.

PoE power supply should be carried out through the network cable, the quality requirements of the network cable are relatively high, the resistance of copper-clad aluminum and all-copper network cable is relatively high, and the transmission distance is not easy to be too far, but it is best to choose oxygen-free copper network cable for PoE power supply transmission, copper-clad aluminum and all-copper network cable are not too safe, and it is generally not recommended to use.

Network PoE crystal headers, those are for signal, and those are for power.

The oxygen-free copper material has small resistance, stable transmission effect, and the transmission distance is long, and the transmission distance of PoE power supply is about 100 meters. PoE power supply must rely on the 8 cores of the network cable to work.

Network PoE crystal headers, those are for signal, and those are for power.

When the network cable is used for PoE power supply, the 8 core connection method of the network cable is connected in accordance with the national standard connection method, when the network is used to monitor the PoE power supply, the work of the core distribution is also different, and the PoE power supply system needs 4 cores to send and receive, and 4 cores to supply power. 4 of the network cables are used to transmit data; The other 4 are used for power supply:

Used as the positive pole of the power supply Used as the negative pole of the power supply.

Network PoE crystal headers, those are for the signal, those are for the power mode A (idle line 45, 78 power supply): 45 (blue, blue and white) is +, 78 (brown white, brown) is -

Mode B (data line 12, 36 power supply): 36 (green-white, green) is +, 12 (orange-white, orange) is -

The standard definition of the supply voltage is DC 44-57V

The standard definition of the supply voltage is DC 50-57V

But in general, 1236 (orange-white, orange, green-white, green) will be used to transmit data, 45 (blue, blue-white) power supply positive and 78 (brown-white, brown) power supply negative.

There is no specific power supply line for network cables, which are basically used as signal lines, with four for 100 megabits and 10 megabits, and 8 for gigabits.

Among them, the PoE power supply is transmitted through the network cable, but it is also transmitted together with the data line, and the power is extracted through a specific circuit at the receiving end.

Which network cable supplies power is determined by the devices at both ends.

The network cable itself does not supply power, the network cable transmits data, but two of them can be used to power up (if the voltage is not high).

It depends on what your network cable is for, if it is connected to the PoE camera, it is 1236 signal. 4578 power supply. Connect to your computer and leave it alone.

Haha, blue is the positive electrode and brown is the negative electrode.

This one doesn't need to be powered!

This is all about transferring data.