There are various types of wires and cables, but how can you choose the cable specification model you need?

When selecting wires and cables, use, laying conditions and safety should be considered;

For example, according to different uses, power cables, overhead insulated cables, control cables, etc. can be selected;

According to the different laying conditions, general plastic insulated cables, steel tape armored cables, steel wire armored cables, anti-corrosion cables, etc. can be selected;

According to safety requirements, non-extended combustion cables, flame-retardant cables, halogen-free flame-retardant cables, fire-resistant cables, etc. can be selected.

Selection of wire and cable specifications

When determining the wire and cable specifications (conductor cross-section), selection conditions such as heat generation, voltage loss, economic current density, and mechanical strength should generally be considered. According to experience, low-voltage power lines generally select the cross-section according to the heating conditions due to their large load current, and then check their voltage loss and mechanical strength; low-voltage lighting lines have high requirements on voltage levels, and can first be based on the allowable voltage loss conditions. Select the cross section, and then check the heating conditions and mechanical strength; for high-voltage lines, first select the cross-section according to the economic current density, and then check the heating conditions and allowable voltage loss; for high-voltage overhead lines, the mechanical strength should also be checked. If the user is inexperienced, he should consult the opinions of relevant professional units or persons.

How should the specification and model of the cable be selected?

Cable sheath specifications

What is a sheathed wire? It is a sheathed wire and cable. The sheathed wire is just a common name. Generally, the sheathed wire generally refers to the rvv cable and the bvv series wire and cable. The rvv cable is a soft sheathed wire, and the bvv is a hard sheathed wire. The following are the parameter comparisons and specifications of the two sheathed wires:

Full name: rvv full name PVC insulated PVC sheathed flexible cable; bvv full name PVC insulated PVC sheathed cloth wire;

Structure: Whether it is a soft sheathed wire or a hard sheathed wire, there is an obvious feature, that is, the outer layer of the wire is composed of a layer of sheath, which is covered with wires, and the rv wire is covered by the rvv cable, which is covered with bv The wire is a hard-sheathed bvv cable.

Material: The sheath material of the sheath wire commonly used is polyvinyl chloride, that is, pvc plastic.

Executive standard: gb standard;

Quality standard: 3c certification;

Product code: rvv soft sheathed line is 277iec53; bvv hard sheathed line is 277iec10;

Conductor: The conductor of rvv soft sheathed wire is composed of oxygen-free copper wire, so the wire body is softer, the bvv hard sheathed wire is composed of bv wire, and the conductor of bv wire is a single-strand conductor, so it is relatively hard