ENERPIA
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TECHNICAL INFORMATION 1 – HEATING CABLE AND CONDUCTOR
Types of electrical cable
Electric cable: Spreads conductors such as metal (mainly copper wire) in the longitudinal direction and connects 2 points in order to send electricity or electric signal to the device installed on both ends. Uses sheath in general for insulation and protection. Electrical cables have various structures according to factors such as their uses, characteristics, and environment for using the cables.
| Wire, Cable |
Wire | Electrical cable with a single conductor (single or stranded) |
|---|---|---|
| Cable | Electrical cable with 2 or more insulated conductors | |
| Structures and shapes of electrical wire |
Single Conductor | Uses one conductor and it is easy to maintain the bent shape |
| Stranded Conductor | Collects multiple thin conductors and has better flexibility than single conductor | |
| Twisted Pair | Electrical cable which twists 2 insulated electrical cable with certain pitch (ex: LAN cable) | |
| Shield Cable | Electrical cable with netlike braiding or coiling with metal (Cu or Al tape) for blocking external noise | |
| Flat Cable | Electrical cable where insulation cable is spread out in balance for multiple conduction | |
| Coaxial Cable | Has internal conductor and external conductor (braided or metal tape). Mainly used for sending high-frequency signal (ex: CATV) | |
| Optical Fiber Cable | Cable for sending multiple signals at the same time using optical fiber instead of copper wire |
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Wire (single conductor) -
Wire (stranded conductor) -
Triple-braided cable -
LAN cable (pair) -
Coaxial cable -
Optical fiber cable
Production process for heating cable
The production process for heating cable is as follows. Process and facilities with various methods are used according to the product structure and characteristics.
Type (shape) of the conductor
| Type | 단면 현상 | Details |
|---|---|---|
| Solid conductor |
 |
– Conductor with 1 wire without stranded wire. It is inexpensive but has poorer characteristics of flexibility and curve-resistance as well as reliability compared to stranded conductor, therefore not being used often as electric cable for electronic appliances – Used for central conductor with coaxial conductor or for fixed wiring of small-sized communication cable. |
| Concentric stranded conductor |
 |
– Composed with single or multiple-stranded wire at the center, surrounded by multiple strands of wire in a concentric circle. In general, 7 strands, 19 strands, and 37 strands with single wire at the center are used often. It has a flat surface while acquiring flexibility and curve-resistance, being used for thin-wall insulation cable, electric cables or heating cables that require flexibility. – Generally stranded to the opposite direction by layer. Soft pitch increases towards outer layers. |
| Bunch stranded conductor |
 |
– Multiple wires are collectively stranded in the same direction. It has much unevenness on the surface in terms of structure and composition compared to concentric stranded conductor, but is cheaper than concentric stranded conductor, being appropriate for mass production. – Has adequate utilitarian quality and reliability, being used most generally as electric wire conductor for electronic devices |
| Rope lay conductor |
 |
– Conductor which strands wires that have already been joined (child strand) once more into a concentric circle (parent strand) – also called stranded conductor. Called rope lay conductor because it has the same composition with wire rope Used as conductors for electric cables that require flexibility and curve-resistance, such as portable wiring Has many types according to use or curve-resistance just like wire rope |
| Compressed stranded conductor |
 |
– Compact Type: Has no space inside, reducing the external diameter of the conductor – Compressed Type (compressed conductor): Structure which reduces internal space and improves production productivity compared to Compact Type – Used mainly for thin-wall insulation cable |
Production process for conductor
Production process
General characteristics of Copper (Cu)
| Item | Unit | Specifications |
|---|---|---|
| Tensile strength | kgf/mm2 | 23.46 (reference) |
| Elongation rate | % | Over 30 |
| Resistance | Ω∙g/m2 at 20℃ | Below 0.15328 |
| Conductivity | % at 20℃ | Over 100 |
| Tensile strength | % | Over 99.90 (99.97 in general) |
