Type of Wire Conductors
TYPE | Cross Section | Description |
Solid conductor | ![]() |
A single strand, uncombined conductor. It is low cost but is generally not used for electronic wire & cable as its flexibility, handling of bend resistance & reliability is poor. The central conductor for coaxial cable & small size data transmission cable etc. Used in fixed wiring. |
Concentric stranded conductor |
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It has a single or multiple strands in the center & around each layer are combined concentric shaped strands. Generally, the single center core’s : 7, 19 or 37 strands has many adaptations. Flexibility & the handling of bend resistance is maintained & it also has a s |
Bunch stranded conductor | ![]() |
Multiple strands are bundled together & combined in the same direction. When compared to the concentric stranded conductor, regarding the construction & stranding - surface unevenness is a failing. However, with its low price & suitability to mass production & also its sufficient handling ability with regards to practical usage & reliability, it is for a variety of reasons the most generally used conductor for electronic wire & cable. |
Rope lay conductor | ![]() |
Once it is a bunch stranded conductor (child strand), it is once again combined into a concentric stranded conductor (parent strand). As it has rope lay strands it is called a rope lay conductor. It is the same as a wire rope strand, so is also known as a ‘rope conductor’. It is a conductor used for mobile wiring, & wire & cable that require flexibility & bend resistance. Like wire rope there are many types depending on use & bend resistance. |
TASC Tin over coated tinned annealed stranded copper wire |
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The flexibility of this standed conductor does not have many failings ; it has also improved on the bendability of the solid conductor. The tinned annealed copper has 7 identical strands (right Z) - bundled together with a thin (3-5 μm) tin coating. It was originally developed for wrapping connector use, but over recent years it has become difficult to open the conductor strand when inserting it into the PCB. It has the added advantage of having solderability, & it is used as the conductor for hook up wire, & extruded flat ribbon wire on directly soldered PCBs. There is also excellent bend resistance in the stainless steel center wire conductor (SUS). |
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