Wiring distance requirements for strong and weak electricity

With the development of science and technology and the arrival of the era of intelligent building, the weak project has been paid more and more attention. And do weak engineering and technical personnel are aware of strong electricity and weak wiring distance is required.

Why strong electricity, weak wiring to separate it? This is because of strong electricity around the magnetic field, if the strong electricity wiring distance too close to the weak signal will have an impact, the specific performance: if it is a cable TV line, the signal will not be very clear; if it is a telephone line, the phone will appear murmur; Network transmission speed will be affected and so on.

Therefore, in the strong and weak electrical wiring, we must follow the following weak electrical wiring distance requirements:

(1) The user cable cannot be along with the High-voltage (ac>1000v,dc>1500v) cable (bundle) line. The terminals of the communication cable and the terminal of the high voltage cable are at least 450mm apart.

(2) User cables generally avoid with low-voltage (ac<1000v,dc<1500v) wires together (bundle) along the line. The terminals of the communication cable and the terminals of the low-voltage wires (in the case of solid spacer) have a minimum interval of 150mm. More Wonderful content: http://www.bianceng.cn/Network/zhbx/

(3) The user cable can be allowed to go with the ultra low voltage (ac<42.4v,dc<60v) wire (bundle), and the terminal needs no interval.

(4) The user cable should be separated from some harmful equipment (such as arrester, corrosive fluid, object with temperature exceeding 60 ℃, etc.), and its spacing must not be less than 150mm.

(5) The power cable is separated from the user cable wiring see table 1.

Table 1 power cable separated from user cable wiring

(6) Prevention of noise separation between low-voltage cable and communication cable see table 2.

Table 2 Prevention of noise separation between low-voltage cable and communication cable Cross