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Power cables mainly consists of following components
1. Conductor - Conductor is the power carrying part of the power cable. Copper or aluminum is most preferred material.
2. Insulation - Insulation is provided on each conductor of the power cables. Commonly used insulation material in power cables are PVC (Poly Vinyl Chloride), Rubber, XLPE (Cross linked Poly ethylene). The type of material used is selected based on the operating temperature.
3. Protective Sheath - The outermost cover of the power cables is called the protective sheath. It is usually made of PVC (Poly Vinyl Chloride) and Rubber (various types). The purpose of outer sheath is to provide protection from water, chemical and mostly mechanically.
Power cables are used mostly for electric power transmission and dispersal. Power cables can be used for permanent wiring within building structures which may be concealed or exposed. Also, Power cables can be used in portable devices or machines when designed flexible materials. Power cables are designed based on the application, voltage and operating temperature.
There are various types of power cables based on their size and material which identifies with its applications. Types of Power cables and their uses
1. Aluminum cable: Aluminum power cable is the extensively used power cable. It is known for its high electrical conductivity. The ductility, light weight, non-magnetic properties of Aluminum makes it useable for several heavy-duty applications. Also, aluminum is recyclable. The most common areas of application are electric lights, telephone lines, and motors.
2. Copper Cables: Copper Cables are another widely used electrical cable that is utilized in a major industrial segments, say mining, electronics, transportation, and telecommunication. Copper Cables are at par with aluminum cables in electrical conductivity, ductility, weight and flexibility. Mostly, Copper Cables find application in integrated circuits, electromagnets, electrical switches, etc.
3. Industrial Cables: Industrial Cables are especially designed to resist extreme temperatures and find applications in sectors such as chemical plants, aviation, oil refineries, pharmaceutical companies, etc. The Industrial Cables offers great resistance to physical elements like oil, grease, chemicals, fire etc. Coaxial Cables, Armored Shielded Instrumentation Cables, are some of the commonly used power cables.
4. Fiber Optics Cables: Fiber Optical Cables consist of one or more translucent fibers sheathed in a protective jacket. This type of cable can be further categorized into Simplex Fiber, Duplex Fiber and Multi-Fiber Optical Cables. The Simplex Fiber Cables are made up of one optical fiber. Likewise, the Duplex Cables are made up of two optical fibers and the Multi-Fiber Cables are made up of several optical fibers. Fiber Optic Cables has major application in telecommunications and computer networks.
XLPE or PVC Posted on 8/16/2016
For medium to high voltage application, XLPE power cables are preferred. XLPE power cables are more resistant to high temperature than PVC. XLPE is a thermoset, hence it can withstand higher temperatures upto 90 degrees.
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