The role of wire and cable braiding

Wire and cable is mainly composed of conductive wire core, insulation, sheath layer, three basic structure. The difference between the wire and cable has no strict boundaries, but speaking from a broad meaning, cable structure is complex, it has complex sheath layer, and some only conductor and insulation wire structure is simple, some only weave tu la light armor layer or coating a layer of light soft armor layer. The conductive wire core wire and cable is used for the transmission of current. To reduce power loss and voltage, conducting wire core general selection of high conductivity copper and aluminum. The role of the insulating layer is to prevent the current along the radial leakage, ensure use safety. Therefore require insulating layer has good electrical insulating properties. Heat resistance and mechanical strength.
                      

Outside the insulated wire core or a cable core protection layer called the sheath of the cable. The main function is to protect the insulation sheath. Its main performance is moistureproof, prevent oil, anti-corrosion. Anti aging, sun fire resistant, as well as mechanical protection, but also has the electric and magnetic resistance etc. From the perspective of cable sheath, weaving is many kinds of wire and cable sheath or one of the outer sheath. However, according to the materials used in wire and cable braid braid and different parts in the structure of wire and cable, the role of the braid is obviously different.

cable braiding

The effect of fiber braid
For wire, fiber braid is a form of the light cover. Its main function is to protect the insulation is not affected by or less by all kinds of light, heat, moisture, low temperature, acid and alkali gases such as erosion and external mechanical force damage, to ensure that the wires, such as enhanced sheath is in the middle of the rubber or plastic sheath in cotton yarn, hemp fiber braid, in order to improve the strength of the sheath.
The effect of metallic braid
Metal braided layer are mainly copper, tin plated copper wire braid and steel wire (wire) two woven layer
Is the main purpose of seller, copper wire weaving:
1. Preventing electromagnetic interference shielding effect such as tin plated copper wire braided dedicated cable, wire weaving control cable, etc.
2. Eliminate shield of power cable surface potential, it bound power line and eliminate the induction, such as high voltage cable total shielding.
3. The shielding effect of security protection, in the main core insulation braided copper wire and with core or on the ground a good contact, timely response to the leakage situation, such as mining cable shielding
And social, is the main purpose of steel wire armoured:
L. mechanical protection. Such as Marine power cable CF31 type.
2. Under longitudinal tensile force, such as Marine geology exploration using magnetic measurement cable WC - GC, WCT.
3. The magnetic shielding.
By above can see, the role of braid in wire and cable is obvious, wire and cable prices also will be different, choose to pay attention to the use environment of wire and cable, wire and cable, in order to choose the right wire and cable.

http://www.anytecable.com/product.asp

Fire-resistant cables for security alarm

The field repair of the cable also must be prepared to some of the tools and materials used fully, plastic welding torch is essential, high-voltage insulating tape, waterproof tape and plastic insulated and sheathed strip cut leather, such as sealing material, must also be prepared, because the cable insulation sheath material is mainly divided into crosslinked polyethylene, polyethylene, PVC etc. Some materials belong to thermosetting materials, such as crosslinking polyethylene insulation can't repeat the molten again use, use of raw materials for repairing in site, can only use high voltage insulation tape and repair in United States 3 m tape series for repair. And some of the material belongs to thermoplastic material, can again with high temperature, fused using such as polyethylene, PVC and other materials, can live out, using the cable ends covering materials for cutting down the edges of cut into thin strips, can realize the low voltage cable insulation and sheath repair, the repair quality can fully meet the cable normal use performance requirements.

Another for medium voltage Security cables cable sheath damage phenomenon during the processing, cannot too rough, a process is the installation of the cable must be a light to put, please again after a cable appear external damage, its internal insulation damage sometimes is to say, the author used on construction site installation process accidentally damage to large area of outer sheath of the cable, and with returned to the factory, found that the partial discharge of cable damage levels and breakdown phenomenon, so for medium voltage power cable laying process appeared at the scene of outer sheath after damage, it is best to truncate or to replace the cable intermediate joint, because after the sheath of cable damage repair, there may be using.

PVC insulated & sheathed Control Flex Cable

Anyte Flexible cables for cable tracks are especially designed for use with high reversed bending stress as for example in production lines, high rack storage areas or pacing machines. They show a very good durability with very small bending radius.

Anyte Flexible cables also use high strand conductors, but there are more factors involved controlling the flexibility; Such as, Shielding, outer jacket material, cable lay construction and type of conductors just to name a few.It's always best to discuss your flexibility needs and the conductors available with a wire and cable manufacturer, especially one that works with high strand count conductors. Off the shelf (commodity) wire manufacturers usually work with solid, 7 and 19 strand conductors which are less flexible than the high strand conductors.

PVC insulated & sheathed Control flex cable Screened numbered cores
Conductors: Plain annealed flexible copper
Insulation: PVC (Polvinyl chloride)
Screen: Melinex tape & TCWB (Tinned copper wire braid)
Sheath: PVC (Polvinyl chloride)
Voltage: 300/500v
Operating temperature: Maximum 70°C, Minimum 0°C
Standards: VDE0250: Insulated power cables. General specifications
BSEN50266-1:2001: Common test methods for cables under fire conditions. Test for vertical flame spread of vertically-mounted bunched wires or cables