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  • Types of cables


    An electric cable has the

    purpose of transporting electrical energy from one point to another. Depending on their

    final application, cables can have different configurations, always basing their design

    on national and international regulations.



    Low voltage cables (up to 750 V): in a variety of applications, and with

    thermoplastic and thermoset coatings. They are designed and built according to harmonized

    standards.


    Low Voltage cables (up to 1,000 V): (also called (0,6/1 kV) The cables in this

    section are used for industrial power installations in various fields (general industry,

    public installations, infrastructures, etc.). They are designed according to

    international standards (UNE, IEC, BS, UL).


    Medium Voltage cables: from 1 kV to 36 kV. They are used to distribute electricity

    from electrical substations to transformer stations.


    High Voltage cables: from 36 kV. They are used to transport electricity from the

    generating plants to the electrical substations.


    Types of electric cable by their use


    Low voltage cables


    Cables for electric panels


    Flexible cables for wiring electric cabinets. These electric cables are especially

    suitable for domestic use, for installation in public places and for internal wiring of

    electrical cabinets, switch boxes and small electrical appliances.


    Power cables


    Energy cables for industrial facilities and public places. It is common to find

    power cable in applications for power

    transmission in all types of low voltage connections, for industrial use and for variable

    frequency drive (VFD).


    Armoured cables


    Cables with aluminium or steel reinforcement for installations with risk of

    mechanical aggression. It is also common to find armoured cables in places where rodents

    are present, as well as in installations in premises with a risk of fire and explosion

    (ATEX).


    Rubber cables


    The use of extra flexible rubber cable

    is very varied. We can find rubber cables in fixed industrial installations as

    well as in mobile service. Welding cables should have a rubber sheath, which allows high

    currents to be transmitted between the welding generator and the electrode.


    Halogen-free cables


    High Security Halogen Free (LSZH) Cables with low smoke and corrosive gas emission in

    case of fire are suitable for use in wiring of electrical panels and public places,

    installations of all kinds in public places, individual derivations, emergency circuits,

    public distribution networks and also for mobile service.


    Fire resistant cables


    These cables are specially designed to transmit electrical energy in the extreme

    conditions that occur during a prolonged fire, guaranteeing supply to emergency equipment

    such as signalling, smoke extractors, acoustic alarms, water pumps, etc. Their use is

    recommended in emergency circuits in places with public concurrence.


    Control cables


    Control cable for

    fixed or mobile installations should be extremely flexible, as they are mainly designed

    for small household appliances, for the interconnection of machine parts used for

    manufacturing, for signalling and control systems, for the connection of motors or

    frequency converters, for signal transmission where the voltage induced by an external

    electromagnetic field may affect the transmitted signal or for power supply connections

    to avoid generating electromagnetic fields.


    Instrumentation cables


    These are flexible and shielded cables for the transmission of signals between

    equipment in industrial installations. Especially suitable for optimum data transmission

    in environments with a high level of electromagnetic interference.


    Solar cables


    These cables are particularly suitable for connecting photovoltaic panels, and from

    the panels to the DC to AC inverter. Thanks to the design of their materials and their

    cover, which is especially resistant to solar radiation and extreme temperatures, they

    can be installed outdoors with full guarantees.


    Special cables


    There is a wide variety of electric cables for special installations such as:

    temporary light garland installations at trade fairs; connections for overhead cranes,

    hoists and lifts; applications in submerged pumps and drinking water areas such as

    aquariums, purification systems, drinking water fountains or in swimming pools for

    lighting, purification and cleaning systems.




    PVC Cables or PUR Cables: How to Choose the Right Cable






    Cables are an essential part of any industrial application. It is important

    to make sure that you choose the appropriate cable material for the environment,

    especially where chemical cleaning solutions, cutting fluids, and other caustic liquids

    are present. The two main types of cables used in industrial applications are either PVC

    or PUR, and they are each suited to different types of environments. This article

    describes the difference between PVC and PUR cables and when to use each type of cable.






    PVC Cables and When to Use Them






    PVC cable is Polyvinyl Chloride (PVC) cables that is sheathed and

    insulated. PVC cables are an excellent choice for most chemical washdown applications in

    the food industry and beverage industry. They have good-to-excellent resistance to

    common cleaning solvents including, but not limited to:


    Sodium Hypochlorite


    Sodium Hydroxide


    Potassium Hydroxide


    Peracetic Acid


    Hydrogen Peroxide


    Quaternary Ammonium Compounds


    It is also important to take into consideration the concentration of

    chemicals, temperatature of the process, and the duration and frequency of exposure since

    these factors can impact the suitability of PVC for these applications. Furthermore, PVC

    has limited resistance to oils, making it less suited for automotive and machine tool

    industries.


    In addition to being resistant to common cleaning chemicals, PVC cables are

    generally more rigid than other types of cables. This makes them suitable for use in

    applications where they will be exposed to high temperature, high pressure washdown. The

    rigidity of the PVC sheathing protects the cable from damage and extends the life of the

    cable.


    A PVC cable with IP69K rating means it is sealed against the ingress of water

    even during washdown. However, the rigidity of PVC cables can be a disadvantage in

    freezer applications, where low temperatures can cause the material to crack if the

    cables are being flexed. Discuss your specific application with an expert to determine

    the best cable material in these circumstances.






    PUR Cables and When to Use Them






    PUR (or polyurethane) is a thermoplastic material used for cable jackets.

    Because PUR cables are resistant to cutting fluids, oils, and other harsh chemicals, they

    are a good choice for many automotive manufacturing

    , stamping and machining applications.


    PUR cables also have high tensile strength, tear resistance, and abrasion

    resistance. They are also extremely flexible, with a small bend radius. This makes them

    ideal for applications where connections move or bend frequently, such as robotic

    applications.




    What do you mean by XLPE cable and what are its advantages over conventional cables ?


    XLPE cable means

    cross linked polyethylene insulated aluminium conductor armoured cable. In XLPE cable

    stranded aluminium conductor is first screened in the form of a semi conducting extrusion

    which provides a smooth conductor surface and prevents formation of cavities at the

    surface of the conductor when the cable is subjected to bending. The screened conductor

    is insulated with extruded XLPE compound. The insulation is further screened with layer

    of nonmetallic semiconducting material and over that a non magnetic metallic screen in

    the form of copper or aluminium tape is applied. In case of multicore cables cores are

    laid together with suitable filler in the interstices and wrapped with PVC tapes or

    extruded PVC. For mechanical protection non magnetic aluminium wire/ strip/tape armour

    for single core cables and steel wire armour for multicore cables are provided over the

    inner sheath. A layer of PVC/PE is extruded as outer sheath usually in back colour to

    prevent ingress of moisture.

    The space feature of the XLPE insulation is that long molecular chains of polyethylene

    are cross linked to each other by means of a process similar to vulcanisation of rubber

    and thus forming a three dimensional network structure with strong bond. Pure

    polyethylene is a thermoplastic material i.e. it becomes soft and plastic on heating and

    hard on cooling. Pure polyethylene is converted into thermosetting XLPE i.e. it sets

    permanently when heated. By cross linking process the polyethylene insulation of the

    cable is made thermally stable and also the melting point is greatly increased. So XLPE

    insulated cable has better resistivity to thermal deformation for its higher thermal

    tolerance property. Due to excellent thermal properties the current carrying capacity of

    XLPE cable is higher than that of conventional cable. XLPE insulation has higher

    dielectric strength compared to other conventional dielectrics used for cables resulting

    low dielectric loss.

    XLPE cable is made suitable for high voltage and extra high voltage application puto 132

    kV. This cable can be used for long cable routes in high voltage transmission where the

    dielectric losses play a major role. This cable can easily be hadled due to lighter in

    weight than any other high voltage cable. As there is no case of oil migration from

    insulation it can be installed for inclined or vertical runs without any hesitation. XLPE

    insulation is highly resistant to moisture for which no special precaution is needed at

    the time of jointing & termination. The joining of XLPE cable needs less time than that

    of any other conventional cable of similar grade. These cables can safely be used on any

    vibrating layouts like bridges. These cable have the better resistance to salinity of

    water in the ground, chemicals, oils and corrosive furnes. These are free from fire risk.

    These cables are not prone to failure due to ageing characteristics and have longer life.


    Advantages of Using ABC Cables:


    ABC Cable Network

    introduced a number of benefits that you get to avail when you use ABC cables instead of

    conventional ones. Here are some of them:


    ·Increased Safety:ABC cables are more safe, secure, and reliable than any

    conventional transmission lines.


    ·Low Maintenance Costs:These cables have low power costs, low installation costs,

    and, most importantly, low maintenance. It has all of it. This is why aerial bundle cable

    has started to replace the obsolete bare copper and aluminum conductor worldwide.


    ·Wide Area Coverage:Unlike traditional uninsulated transmission cables, you can use

    ABC cables in all areas. Knowing about ABC cable specifications, it is perfect for areas

    where the installation is quite a task.These cables are the best choice for installation

    in congested urban areas,where it is very difficult to lay the lines in between the

    narrow gaps of buildings. It is totally not possible to install bare conductors

    there.They are also quite ideal for places such as hilly areas or dense forest.ABC Cable

    Company ensures that they lay power lines there without trimming any trees.


    Common Types of Electrical Wire Used in the Home


    Knowing the basic wire types is essential to almost any electrical project around the

    house. When you're installing new wiring, for example, choosing the right wire or

    cable is half the battle. And when you’re examining existing wiring in your home,

    identifying the wire type can tell you a lot about the circuit the wiring belongs to—for

    example, when you open a junction box and need to determine which wires go where. Wiring

    for modern homes is quite standard, and most homes built after the mid-1960s have similar

    types of wiring. Any new electrical installation requires new wiring that conforms to

    local building codes.


    Here are some common types of home electrical wire.


    It helps to understand a few basic terms used to describe wiring. An

    electric wire is a type of -

    conductor, which is a material that conducts electricity. In the case of household

    wiring, the conductor itself is usually copper or aluminum (or copper-sheathed aluminum)

    and is either a solid metal conductor or stranded wire. Most wires in a home are

    insulated, meaning they are wrapped in a nonconductive plastic coating. One notable

    exception is ground wires, which are typically solid copper and are either insulated with

    green sheathing or uninsulated (bare).


    The most common type of wiring in modern homes is in the form of nonmetallic (NM)

    cable, which consists of two or more individual wires wrapped inside a protective plastic

    sheathing. NM cable usually contains one or more “hot” (current-carrying) wires, a

    neutral wire, and a ground wire.


    As an alternative to NM cable, individual wires can be installed inside of a rigid or

    flexible metal or plastic tubing called conduit. Conduit is typically used where the

    wiring will be exposed and not hidden inside walls, floors, or ceilings.


    These larger wires in your home are carrying circuit voltage, and they can be very

    dangerous to touch. There are also several wires in your home that carry much lesser

    amounts of "low-voltage" current. These are less dangerous, and with some, the

    voltage carried is so low that there is virtually no chance of shock. However, until you

    know exactly what kind of wires you are dealing with, it's best to treat them all as

    dangerous.

    • Creado: 24-11-21
    • Última sesión: 24-11-21

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