An electrician like me, who has done a lot of work, thinks that multi-stranded wire is better to use, because of its characteristics, it is softer and easier to install. The threading tube will not scratch the insulation layer, and the crimping nose is easy to be pressed, so the contact area is relatively large and the resistance is relatively small. Personally, I think it is very useful.

Then what is a single core wire?

As the name implies, the insulating layer has only one conductor. Its advantages are good flexibility, good heat dissipation, good skin resistance and good fracture resistance. Disadvantages are: poor tensile strength, easy to mold, poor surge current resistance, and inconvenient molding.

Then what is a multi-core wire?

There are two or more wires in the insulation layer of a multi-core wire. Its advantages are good flexibility, good heat dissipation, good skin resistance and good fracture resistance. Disadvantages are: poor tensile strength, easy to mold, poor surge current resistance, and inconvenient molding.

Is the household wire single-core or multi-core?

1, when the current passes through the conductor, there is a characteristic, that is, the so-called "skin effect" of the current (when alternating current passes through the conductor, the current will flow on the surface of the conductor), so the single-core conductor with the same cross-sectional area has a larger surface area than the multi-core conductor, and from this characteristic, the multi-core conductor wins.

2. The main difference between single-core and multi-core is the different structure. Because the multi-core is soft, it is not easy to break the core. It is suitable for the bending and stretching movement of conductor in pipeline installation, and the single strand is not easy to pull (unless it is straight); The price of plastic insulated wire with the same specification is higher than that of a single wire. One is complicated technology, and the other is pure copper. Compared with multi-core, single core is more convenient in line connector and equipment wiring.

2. The advantage of multi-core wire over single-core wire is that it is very suitable for bending installation in pipeline due to different structures. From this point of view, multi-core wire wins.

There is no absolute statement about which kind of household wire is good, it should be decided according to the specific use. Like lighting wires, you can use a single copper core wire of 1.5; 2P (inclusive) air conditioners can use copper cores of more than 4 square strands, namely hot electric water heaters and yuba. For the remaining lines, more than 2.5 strands of copper core wire can be used.