The difference between wire and cable depends on the size of the wire is generally small, the electrical conductor cross-section is very large (more than 6 square millimeters) called large wire and cable, smaller (less than or equal to 6 square millimeters) called small wire, insulated wire is also called cloth wire. But sometimes the cable is also classified as theoretical wire.

First, the way the difference wire

Wires: are composed of one or two soft transmission wires, with a soft outer sheath of toast bread to install a conductive carbide mold for electric flow. There are various types of wires such as solid, stranded or hand braided foil. According to the insulation layer, it is divided into two categories: bare wire and insulated wire.

Bare wire is a wire that does not have any insulation or protective layer. In addition to being a transmission line for electromagnetic energy and information content, it can also be used to produce electric motors, prefabricated components of household appliances and electrode connection lines. Generally with copper, aluminum, alloy copper, aluminum alloy profiles and its copper clad steel, aluminum climbing steel and other composite metal composites made. In addition to excellent electrical conductivity, bare wire also has certain physical properties, such as compressive strength, tensile strength, bending and twisting characteristics, stress relaxation resistance, abrasion resistance, etc.

Insulated cables are divided into electromagnetic wires and general-purpose insulated wires according to their main applications. General purpose insulated cables include a variety of connection lines, installation lines. Electromagnetic wire refers exclusively to the production of electromagnetic coils or winding resistance of insulated wire.

Second, the difference between the way the cable

1, the cable: by one or more mutual insulation layer of conductive wire core placed in a sealed sheath of insulated wire. In addition to maintain the soil layer, for the transmission, distribution of electromagnetic energy or transmission of electronic signals. The main difference between it and the general cable is that the cable specification is very large, the structure is more complicated.

2, the key cable consists of the following four parts.

(1), conductive wire core: the

Made of high conductivity raw materials (copper or aluminum). According to the laying application standards for cable soft level, each core is likely to be stranded by a single transmission line or multiple transmission lines.

(2) Cable sheathing.

As the cable insulation material should have high ground resistance, high penetration field strength, low dielectric loss and low relative dielectric constant. Common insulation materials in the cable are oil-impregnated paper, polyethylene, high pressure polyethylene, high density polyethylene, rubber, etc. Cables are often categorized by insulation materials, such as oil-impregnated paper-insulated wires, polyethylene cables, high-density polyethylene cables, etc.

(3), sealed wire sheath: the

Maintenance of insulated cable heart from mechanical equipment, water, moisture, organic chemicals, light and other damage. For easy to return to the moisture insulation layer, the general choice of lead or aluminum extrusion sealing sheath.

(4), maintenance of the soil layer

Used to maintain the hermetic sheath from mechanical equipment damage. Generally choose galvanized steel strip, stainless steel wire or copper foil, copper wire, etc. as armor wrapped around the outside of the sheath (called cable), armored cable layer with the electrostatic field shielding off and to avoid the effect of external radio waves. In order to better prevent the strip steel, stainless steel wire by the surrounding medium of corrosion, generally in their outer edge coated with leach or wrapped around the pre-pregnant linen layer or extrusion molding high-pressure polyethylene, polyethylene cover.

2, the cable according to its main use can be divided into wire and cable, communication fiber optic cable and frequency conversion cable, etc.. Compared with the overhead cable, the advantages of the cable is that the insulation layer spacing between wires is small, occupies a small indoor space, laid underground and does not occupy indoor space above the road, will not be affected by the surrounding air pollution hazards, high closing stability, life safety and the surrounding environment is small. However, the project cost is high, the construction and maintenance are inconvenient, and the manufacturing is complicated. Therefore, the cable is mostly used in densely populated and dense areas of the power network and busy traffic congestion; in the river crossing, river crossing, deep sea laying can prevent the application of large span overhead cable. In the area where overhead cables must be prevented from affecting communications and where they must be considered aesthetically pleasing or to prevent exposure of targets, cables can also be used.