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For many designers, cables and connectors are an after-thought. After all, cables just connect things together. They are only a collection of passive wire and connectors--no special knowledge needed to [...]

The electrical performance of a flexible-cable test structure is characterized from low frequencies up to 25 GHz. The experimental results are used to develop and refine models which describe the performance of such cables, with particular emphasis on the contribution of dielectric and resistive losses, including skin effect. The capability of triplate flexible cables to provide high-bandwidth connections over long lengths is investigated with the models developed. A triplate design is chosen because it offers high density, limited crosstalk, no loss through radiation, and relatively inexpensive fabrication. Bit rates of 100 Mb/s-1 Gb/s are considered for proprogation over lengths up to 250 cm. The paper highlights the performance-limiting factors through realistic examples, including the contribution of interfaces to other interconnection structures.

UNDERSTANDING CABLE PULLING PARAMETERS ALTHOUGH CABLES are tested fully at the factory, many detrimental things can happen to damage them before they are put into service. While modern technology has [...]

High voltage electric cables with conductive stress control layer imbedded between layer of insulation offer superior voltage capability and reduced electric field strengths compared to conventional electric cables. For example, a stress-controlled direct-current cable with 600 kV capacity weighs 24.9 kilograms per meter (kg/m), compared to 39.4 kg/m for a conventional cable design. Applications of stress-controlled alternating current cables are also discussed., The idea of designing the dielectric of ac-cables with two or more layers to obtain a more favourable field strength distribution in the cable by means of different insulating materials [...]

The operators of the Dutch and Danish power transmission systems moved one step closer to linking their markets this week. The operators have now officially signed a cooperation agreement for [...]

Vancouver Island is Nestled Tightly Along the Lower Southwestern Coast of British Columbia, Canada. The island is 460 km (286 miles) long and 130 km (80 miles) wide at its [...]

Construction work on a new 150-kV cable to be laid underneath the Westerschelde estuary between Terneuzen and Ellewoutsdijk, The Netherlands, began on July 2. A ceremony to mark the start [...]

Disposable and reusable medical cables demand specific material, design requirements. Medical cables fall into two general categories: disposable and reusable. As their functions differ in important ways, so do their [...]

SHOREHAM - Three months after its initial proposal to build a 24-mile cable to transport energy between Shoreham and New Haven was blocked by the Connecticut Siting Council, Cross Sound [...]

The Mega Snake for overhead installations is designed to convey thousands of cables used in large cable runs. Featuring the Snake Rail built-in suspension system, Mega Snake requires no brackets [...]

Connectivity of cabling is being standardized on a global basis with the introduction of Category 6 (Cat 6) performance standards although there remains several problems with the use of RJ-45 connectors. The connector design of the RJ-45 prevents it being compatible with Cat 6 cables and therefore previous industry standards. The introduction of super plugs may help improve connectivity of RJ-45 connectors although the high-speed needed to meet requirements in Cat 6 may be compromised. Improved information sharing between manufacturers would help eliminate the connectivity issue.

Whether scratch-building a complete wiring harness or lengthening kit-supplied wires, you need to determine the correct electrical wire size needed to support each electrical device. The wire must carry the [...]

Electrical wholesalers have a wide range of electrical cables available and it is essential that contractors understand their technical performance. In the past, the BASEC marking on a cable indicated its quality and performance, but new marks, such as the CE mark and BS 6500, have been added to cable certification. Contractors considering buying cable should understand that the CE mark is attached by the manufacturer and is no real indication of high quality, while BASEC certification indicates that the cable is tested by an independent testing body for up to 150 safety characteristics.

Electro-mechanical cable designs in dynamic and varied offshore environments present new engineering challenges to manufacturers The Netherlands company De Regt Special Cable designs more than 1,500 electro-mechanical cables per year, [...]

ROPE PERFORMANCE CHARACTERISTICS AND SAFE CABLE PULLING A COMMON REQUIREMENT in any electrical project, whether new construction or renovation, is the pulling of electrical wires and cables. While a great [...]

The company's line of custom-configured ITC/PLTC cable is designed for use in industrial control and instrumentation circuit applications. Three of the six new product platforms are exposed run rated, and […]

Single conductor cables prove more economical than triplex cable.

Cables for variable-frequency drives and motors must be large and sturdy enough to handle the signals and power that control motor speed and torque. The insulation should withstand overvoltages and harmonic frequency voltage spikes. An inner jacket can be utilized to separate the insulation from the braid shield to decrease the capacitance between the braid and the power conductors. Moreover, lower cable capacitance and higher voltage ratings let cables endure the worst reflections, standing waves and spike voltages., Cable runs between variable-frequency drives and motors usually handle more than the signals and power that determine motor speed and torque. They also carry unwanted harmonics, nonlinear spikes, reflections, and [...]

The tradeoff of advancing audio technology is that today's components require a dizzying array of wiring compared to older components. Gordon J. Gow Technologies' Tributaries line of cables meet an audiophile's need for cables with flexibility, good shielding, and correct impedance.

A study by the Copper Development Association found that 4-core electrical cable is not able to withstand the requirements of the new electronic products used in the commercial and industrial environment. To counteract the risk of fire and to maintain a constant supply of energy 5-core cable should be used, particularly in areas where the cessation of power would be disastrous. In 1996 a company wishing to change to 5-core cable had to purchase the product from Italy as it was not available in the United Kingdom.

The computation of the sidewall bearing pressure (SWBP) of a cable is crucial to the design of a power distribution feeder. This phenomenon, which occurs when a conduit-clad cable is bent by pulling, is a function of the bend's radius, the pulling tension and the cable's weight. There are different equations for computing SWBP for one to four cables. In addition, the possibility of jamming whenever three cables are linearly placed in a raceway should be calculated., When a cable is pulled through a bend in a raceway system, as shown in the diagram below, or around a sheave, pressure develops between the cable and the bend [...]

The use of electrical cable constructed of polymeric composites has created a demand for matching accessories. The benefits of the terminations employing polymeric composite designs are simplicity and lighter configurations, and the deletion of compound filing when using box terminations. Pre-molded rubber designs are not useful for shaped conductors or paper-insulated cable, but heat shrinking eliminates that problem.