Circuit engineering is a very important step in the decoration process. The selection of wire is also related to the safety of later electricity. Here's a brief introduction to the usual specification and grade selection of home decoration wire, so as to help you better choose the appropriate home wiring.

1. The specifications of the household electric wire

The wire specification is usually expressed in square. The square of the wire refers to the cross section area of the copper wire. According to the different conductor structure, the wire is divided into single conductor, hard wire and stranded wire. The number of square wires for multiple strands is the sum of the cross section area of all copper wires.

There are mainly 1.5 square, 2.5 square and 4 square three kinds of commonly used specifications, and 6 square and 10 square wires, which are mainly used for entering the main line, and almost no use in home decoration works.

1.5 square line: mainly used for lighting and switching lines

2.5 square line: mainly used for socket power and common electric appliances.

4 square line: it is mainly used for high-power appliances such as circuit mainline and air conditioner. Because of more kitchen appliances and large power consumption, sometimes 4 square wires will be selected.

Two. Model of household electric wire

The single conductor hard line has two types of WDZ-BYJ and BV, and the multiple stranded wire has three types of WDZ-BYJ, BVR and RV.

WDZ-BYJ: low smoke halogen-free crosslinked polyolefin wires (depending on the results of conductors, hard lines and cords)

BV:PVC wire, only one copper wire single core line, more hard

BVR:PVC wire, a lot of copper wire twisted single core wire, more soft

RV:PVC wire, more strand of copper wire twisted single core line, very soft

The letter B represents the wiring for wiring, and the letter V represents the insulating material PVC, and the letter R represents the soft.

Single stranded conductors and hard wire cords are single core wire, another kind of multi core line, also called the sheath line, before the family decoration often used for indoor walk line, can be directly buried in the wall or is fixed on the wall, is now less used. The sheath has two types: BVVB and RVV.

BVVB: a hard sheathing line, two or three BV lines set together with a sheath

RVV: a soft sheath, a pair of 3 or 4 RV lines with a sheath.

Three. Purchase of electric wire and wire in home

Check the package and mark: whether the information on the certificate is complete or not, there is a certificate of "CCC" certification and quality system certification.

Look at the manufacturing process: intercept a piece of copper wire and see if the core is in the middle of the insulating layer.

Check the quality of copper core: high quality copper core purplish red, luster, soft hand, inferior copper core is yellow, white or black.

Check wire size: the cross-sectional area of the wire length and view the inner core and the label is consistent, avoid Quejinduanliang, the resort to deceit.