Electric power fittings, cable, tax classification code how to choose
Cable distribution box according to its electrical composition is divided into two categories: one is not any switch equipment, the box only the cable end of the processing and connection of the attachment, the structure is relatively simple, smaller, more functional , Can be called ordinary distribution box; the other is not only the general distribution of the box annex, but also contains one or more switchgear, its structure is more complex, larger, more connected devices, manufacturing technology Large, high cost, can be called advanced distribution box
The incoming and outgoing wires are electrically connected together The potential is the same, which is suitable for tapping or branch wiring It is common practice to add the number of lines back to the number of times The three-branch cable splitter box, which has three equipotential bonding points on each phase, can be used as a second or two-in-one Cable distribution box contains U, V, W three-phase, three-phase circuit structure is the same, along the row together 2 High-level distribution box High-level distribution box containing switching equipment, both from the ordinary distribution box of the tap, branch, but also from the power supply circuit control, conversion and change the mode of operation The switch fence roughly divides the cable circuit into the inlet and outlet sides, and the potential on both sides can be different The switchgear itself has a larger volume, so the high-level distribution box size is relatively large, the height is generally 14 ~ 18m, the depth of about 09 ~ 10m, the length of the number of switching devices according to the number, M to 24 m The shape of the box is similar to that of an outdoor box transformer, and there are a number of active doors on the shell Some doors are designed for the operation of the switchgear Some doors are provided for the installation or maintenance of the cable connection device The
1 Ordinary distribution box There is no switch device in the general distribution box
