What is the difference between single core and 2 core power line and 3 core power line in communication power supply? Where are they used separately?
In the budget first, Party A shall be confirmed RVVZ-1X35mm^2, RVVZ-1X16mm^2 provided by the party which, under normal circumstances, communications equipment manufacturers to provide the input cable communication equipment, the cable is usually RVVZ-1X25mm^2 or RVVZ-1X16mm^2, RVVZ-1X35mm^2 is less, such as for the construction of Party B, then Party B provides the basic lack of cable, cable purchasing three operators are used, such as equipment manufacturers do not provide, are generally provided by Party A.
In the communication power supply, according to the number of cable core classification: cable is divided into 1 core, 2 core, 3 core, 4 core, 5 core. Normally the 1 core cable for DC distribution and protection of ground wire; 2 core cable for 220V AC cable equipment, the 2 core were firing line and the zero line, but generally require 1 additional configuration of 1 core cable as a protective ground wire; 3 core cable is also used for 220V AC cable equipment, the 3 core fire line, respectively. The zero line and ground protection; 2, 3 core difference lies in the ground with the firing line and the zero line in the same position or the same distribution cabinet, as in the same position or the same distribution cabinet generally choose to use the 3 core cable, if not in the same position or the same distribution cabinet, general selection the 2 core cable, +1 cable, in order to introduce ground protection in other locations. 4, the 5 core cable for 380V communication equipment, the difference between the same and the 2, 3 core cable, is to protect the ground the position and phase position of neutral line, whether the same or in the same power distribution cabinet, cable core wire is respectively 3, 1 neutral line, line 1 protection wire. In addition, it is important to note that when the 1 core cable is used for AC power distribution, it is necessary to reduce capacity.
The cable has single core, 2 core, 3 core, 4 core, 5 core,According to actual needs, such as some equipment is the 3 core cable can, 4 or 5 core cables need some equipment, but also ordinary lighting is two lines of a fire, a zero line, or a plurality of wire connection socket.
