C
97 Posts in this encyclopedia categoryCable core
The cable core is formed by one or more conductors or cores stranded together. This stranding in a concentric position or bundle stranding, including the winding and the overlying inner sheath, is called the cable core. (All information without guarantee)
Cable duct
Cable duct is the name given to ducts on and in buildings, on and in built-in cabinets and furniture in which cables and wires for power supply and data transmission are located in an organised and protected space.
Cable kink protection
Cable kink protection or anti-kink grommets are used for safe, kink-free cable entry into devices or machines.
Cable outlet, straight
Position of the cable opening for enclosures. (All information without guarantee)
Cable strand
In electrical engineering, stranded wire is an electrical conductor consisting of thin individual wires and is therefore easy to bend. Copper is predominantly used as a conductor. In technical terms, electrotechnical standards (e.g. IEC 60228 / VDE 0295) differentiate between less flexible and highly flexible stranded wires as "fine stranded" or "superfine stranded". (All information without guarantee)
Cable structure
Describes (from the inside to the outside) the materials used for cables and wires, their design types and properties as well as the position of the individual elements. (All information without guarantee)
Cabling
Cabling refers to the cable connections between two or more participants. Cabling is always the bottleneck of a signal chain, as all losses resulting from adaptation errors, incorrect cabling, excessively long cable runs or inadequate cable quality can only be compensated for by expensive connection or end devices. (All data without guarantee)
Cabling room
Space in the connector housing to accommodate the connection wires. (All data without guarantee)
Cabling standard EN 50173
This cabling standard defines connectors, cable types and cable lengths as well as electrical properties (building cabling). (All information without guarantee)
Calibration of measuring lines
If a test lead is used to test cables and wires, the resistance is added to the test object. For this reason, an additional resistor is connected in the bridge to equalise the test lead. (All data without guarantee)
CANopen
Communication protocol based on CAN - for communication between interoperable devices in distributed industrial automation systems. It is based on a so-called communication profile, which specifies the underlying communication mechanisms and their description. The most important device types used in industrial automation technology, such as digital and analogue input/output modules, drives, controllers, programmable controllers or encoders, are described in so-called device profiles. (All information without guarantee)
Capacity
The capacitance is a disturbance variable that limits the bandwidth of a wire. The result is a low-pass filter. For example, a high capacitance can change the input signal in such a way that it is no longer recognised without error by the receiver at the other end of the wires. Low-loss coaxial cables have a lower capacitance than standard cables. This is achieved by an improved dielectric. Electrical unit of measurement, measured in farads. (All data without guarantee)
Carbon copy
Electrical spark discharge (charge equalisation) in which an insulation is destroyed. (All information without guarantee)
Carrier frequency
The frequency of the oscillation whose amplitude, phase or frequency is influenced by a signal. (All data without guarantee)
CE labelling
CE markings consist of the graphic symbol "CE". It indicates conformity with all EU directives that apply to the labelled product. CE means that the natural or legal person who carried out or arranged for the connection has ensured that the product complies with all Community directives on full harmonisation and has undergone all prescribed conformity assessment procedures. (All information without guarantee)
CEC / Canadian Electrical Code
The Canadian version of the US National Electrical Code (NEC)
CECC 75 301-801
Cenelec CECC 75 301-801. design specification for high-pole rectangular connectors with round interchangeable crimp contacts. (All data without guarantee)
CENELEC
Comité Européen de Normalisation Electrotechnique (European Committee for Electrotechnical Standardisation). European Committee for Electrotechnical Standardisation. International association under Belgian law based in Brussels, responsible for the harmonisation of electrotechnical standards within the European Union and the entire European Economic Area EEA.
Characteristic impedance
The characteristic impedance is the input resistance of an infinitely long wire or a wire terminated with the characteristic impedance.The impedance is a quantity that represents the ratio of electrical to magnetic waves of a data line. The characteristic impedance is of decisive importance for the compatibility of individual components of a data transmission system. All elements of a data connection must have the same characteristic impedance (e.g. transmitter output, connectors, cables, receiver input). The characteristic impedance is calculated from the inner diameter of the outer conductor, the outer diameter of the inner conductor and the dielectric constant of the insulation." (All data without guarantee)
Clamping point
Possibility of connecting an electrical conductor. (All information without guarantee)
Coaxial cables
Concentric conductor pair consisting of an inner conductor and an outer conductor that completely encloses the inner conductor. Coaxial cables are suitable for low attenuation and distortion-free transmission of high bandwidth signals. Due to their self-shielding structure, they are significantly less sensitive to external interference. Coaxial cables are used in high-frequency telecommunications systems (cable television, Ethernet applications) to transmit high-frequency signals.
Coaxial connector
Coaxial connectors consist of an inner conductor, the surrounding insulator (dielectric) and the outer conductor (coaxial shielding). Coaxial connectors are used to connect circuit boards, cables and devices, whereby very high frequencies can be transmitted. It is crucial that a constant characteristic impedance is maintained throughout the transmission system.
Coding elements
The correct assignment of the connector halves is achieved with coding elements.
Coherent waves
Waves with the same wavelength and a constant phase difference are called coherent waves. (All information without guarantee)
Colour coding
To identify the individual wires or cores in the finished wires or cables, these are usually colour-coded. Three colour markings are preferred: 1st marking = basic colour, 2nd marking: longitudinal stripes, 3rd marking = coloured rings. (All information without guarantee)
Combi detent element
Bracket for connection distributors of different designs on standard mounting rails.
Combustion heat
The heat of combustion is the heat or temperature that is released when a cable or wire burns (see fire load). (All data without guarantee)
Company earthing
Earthing of a point in the circuit, such as the centre point, star point, neutral conductor or outer conductor. (All information without guarantee)
Concurrent lay ladder (B ladder)
Lang lay conductors are conductors or stranded conductors in which the individual wires of the different layers have the same twist direction. By filling the gusset spaces with the wires of the layer above, a better fill factor can be achieved. (All data without guarantee)
Condensation
Capacitive reactance of an alternating current circuit. (All data without guarantee)
Conductance
Effective control unit of an alternating current circuit. (All data without guarantee)
Conductivity
Conductivity is the ability of substances to transport energy, other substances or particles. (All data without guarantee)
Conductivity/conductivity
Conductivity is the ability of substances to transport energy, other substances or particles. There are several forms of conductivity in different areas of physics.Thermal conductivity plays a special role in thermodynamics. It depends on the material and is used to calculate the heat flow density. In simple terms, thermal conductivity expresses the amount of heat that flows through a 1m thick layer of material with a surface area of 1m² in 1s at a temperature difference of 1K.Electrical conductivity or conductivity is the reciprocal of the specific resistance. It increases with the number of freely moving charge carriers in the material and is given by the ratio of current strength to applied voltage. The magnetic conductivity or permeability (H/m or Vs/Am) determines how well the magnetic flux is conducted in a substance. Dielectric conductivity or permittivity (F/m) describes the ability of substances to conduct electric fields. Other areas in which forms of conductivity occur are hydraulic conductivity (permeability for liquids or gases) or acoustic conductivity (conductivity of sound). (All information without guarantee)
Conductor resistance
Electrical resistance of a conductor, which is determined by the length, cross-section and conductance of the material. (All data without guarantee)
Conductor shapes
In power engineering, cables are manufactured with different conductor shapes depending on the intended use. The most common are round conductors, sector conductors, waveguides, rectangular or flat conductors, oval conductors, triangular conductors and concentric conductors. The abbreviations for the conductor shapes are as follows:1. re = round, solid conductor. 2. rm = round, stranded conductor. 3. se = sector-shaped, solid conductor. 4. sm = sector-shaped, stranded conductor. (All data without guarantee)
Conductor shapes Short designations
re = round, solid conductors rm = round, stranded conductors se = sector-shaped, solid conductors sm = sector-shaped, stranded conductors (All data without guarantee)
Conductor, concentric
The concentric conductor encloses one or more insulated conductors concentrically. (All information without guarantee)
Conductor, finely stranded
The fine-stranded conductor consists of several to many thin individual wires. (All data without guarantee)
Conductor, sector-shaped
Everything you need to know about ladders, sector-shaped! Find out everything you need to know about ladder, sector-shaped in the STEX24 glossary. "Discover now (All information without guarantee)
Conductor, solid
The solid conductor consists of only one single wire. (All data without guarantee)
Conductor, stranded
The stranded conductor consists of several individual wires. (All data without guarantee)
Connection
Logical link between one or more users of a networking service (network). (All information without guarantee)
Connection cable
The connection cable is a cable that connects the distribution unit (junction box) to the end device.
Connection side
The side of the connector on which the wires are connected. (All information without guarantee)
Connection, flying
Both sides of the housing are not attached. The function is similar to an extension cable. (All information without guarantee)
Contact resistance
The electrical resistance in a mated or switched contact pair, measured between the connection points under specified measuring conditions. (All data without guarantee)
Contact voltage
Part of a fault voltage that can be bridged by humans. (All data without guarantee)
Copper alloy
Copper is an excellent alloy. There are therefore many alloys for a wide variety of applications. Below you will find some very common copper alloys:CuZn - copper-zinc alloy (brass). Applications depending on the alloy composition: connectors, fittings, etc. CuSn - copper-tin alloy (bronze). Applications depending on alloy composition: plain bearings, spring-loaded plug and screw connectors, etc. CuNiZn - copper-nickel-zinc alloys (nickel silver). Applications depending on alloy composition: connectors, cutlery, coins, etc. CuSnZn - copper-tin-zinc alloys (gunmetal). Applications depending on alloy composition: drinking water applications, etc. (All data without guarantee)
Copper base
The price of most cables and wires already includes a share of the copper price. The copper surcharge is added when the invoice is issued. (All information without guarantee)
Copper number
It expresses the mass of the copper contained in the wires and cables. (All data without guarantee)
Copper properties
Good electrical and thermal conductivity are the most important properties of copper. However, the great importance of this material for technology is only due to the combination of its various good properties, which - also in combination with other metals - have been utilised and further developed for years. (All data without guarantee)
Copper surcharge
Difference between the value of the copper based on the calculated copper basis and the value at the DEL daily quotation. (Copper number (kg / km) x (DEL - copper basis)) / 100 (All data without guarantee)
Core cable
Core wires are solid or stranded wires, usually for fixed installation with rubber or plastic insulation (underground wire).
Core group
Two or more cores stranded together are required for transmitting signals or energy. It is possible to form a circuit that can transmit energy or signals via 2 cores. (All data without guarantee)
Core Ident Code
VDE/DIN colour code for colour-coded low-voltage cables and wires according to VDE 0293-308/HD 308 S2. (All data without guarantee)
Core testing, behaviour at elevated temperature
Behaviour of the core under thermal shock: The insulating sheath of cores is tested for thermal shock by wrapping cores or strips from the insulating sheath of cores around a defined mandrel and placing them in a heating cabinet at 150 °C for approx. 1 hour. After removal and cooling to room temperature, these test specimens must not show any recognisable cracks. (All data without guarantee)
Coupling paths
Electrical wires (mains cables, data cables, bus cables, control cables, etc.) or magnetic, electrical or electromagnetic fields. (All information without guarantee)
Coupling resistance
The coupling resistance provides information about the quality of the shielding. see transfer impedance (All data without guarantee)
Covering or covering
Equivalent for the shielding attenuation of the shielding braid in (dB), a measure for the optical coverage can also be specified in (in per cent). (All data without guarantee)
Crane cables
Crane wires are reeling wires made of plastic or rubber, which can be supported by steel cables. They are intended for use as power and control cables on transport systems, trailing cable systems, railway engines, agricultural equipment, etc. for medium and high mechanical loads.
Creepage distance
Shortest distance between two conductive parts along the surface of a solid insulating material. Creepage distances depend on the rated voltage, the degree of contamination and the properties of the insulating materials. (All data without guarantee)
Crimp connection
The term crimp connection means that conductors are connected to a connecting part by cold forming. This is done using suitable crimping pliers (crimping tools). This type of connection is only suitable for stranded conductors and is carried out using cable lugs, connectors and ferrules, for example.
Cross over cables
Twisted pair cable in which the cable ends are cross-wired. This means that the pins for transmitting (TD) on one side of the cable are connected to the pins for receiving (RD) of the respective wire pair on the other side of the cable (example: TD+ "-" RD+)
Cross-linking, vulcanising
In cable production, the insulating sheaths and jackets of polyethylene elastomer compounds are cross-linked. The macromolecules of the elastomers or polyethylene are linked together by cross-links. The material changes from a plastic to an elastic state. When processing elastomers, this process is called vulcanisation. (All information without guarantee)
CTI value (Comparative Tracking Index)
The CTI value provides information about the conductivity of insulating materials. It influences the creepage distance specification. The higher the value, the shorter the creepage distance can be. The CTI value is used to categorise plastics into insulating material groups.
Current carrying capacity
The current carrying capacity is the maximum permissible current that can be transmitted under the specified and prescribed conditions. (All data without guarantee)
Cut to length
Cables and wires are delivered by the manufacturer in standard lengths rolled up on cable drums or rings. If a customer requires a shorter length than the standard length, this will be cut to length by Stecker Express. (All information without guarantee)
Cut-off frequency
The cut-off frequency is the frequency at the upper and lower end of a frequency range at which the gain has dropped to 71 per cent compared to the middle frequencies. (All data without guarantee)