Cables service

Basic cable television service, which includes 16 channels, costs 15 a month. The initial labor fee to install the service is 25. A 65 deposit is required but will be refunded within two years if the customer s bills are paid in full. Other cable services may be added to the basic service the movie channel service is 9.40 a month the news channels are 7.50 a month the arts channels are 5.00 a month the sports channels are 4.80 a month. 

A customer s first bill after having cable television installed totaled 112.50. This customer chose basic cable and one additional cable service. Which additional service was chosen ... 

A customer s cable television bill totaled 20 a month. Using the passage above, what portion of the bill was for basic cable service ... 

Under the Regulations, the Director General has no power in relation to advertisements carried on any television, radio or cable service. Where an advertisement is misleading, neither the Independent Television Commission nor the Radio Authority have power to seek an injxmction, instead they can refuse to transmit the advertisment. 

The changes described above also allowed much easier access to the high voltage cable for routine (6-month) owner directed, service operations, and provided better upper and lower x-ray cabinet and control cabinet ventilation. With the exception of the x-ray tubes, all the individual manufactured components, on all four systems are identical. There are very subtle differences in the warm-up/start-up sequence on the x-ray controllers on the newer systems due to model/year and x-ray tube differences. The last three systems were supplied with environmental type key-boards for the image processors and base-mounted , rather than conduit-mounted exterior warning indicators. The first system was subsequently upgraded to include the better keyboard and the external warning appliances/features. 

PVC—nitrile mbber permanent plasticization of PVC, improved processibihty wire and cable insulation, food contact service 141,317,318... 

Nearly all polymeric materials require the addition of antioxidants to retain physical properties and to ensure an adequate service life. The selection of an antioxidant or system of antioxidants is dependent upon the polymer and the anticipated end use. A product that will not be exposed to the elements for a long period of time such as polyethylene grocery bags does not need a long term stabilizer polyethylenes used to iasulate communication cable must be stabilized for many years of service. 

For most plants, 01001 110 distribution systems start at the power company s service point on the plant s property. The choice of an electrical system will depend on many fartors relating to the particular projecl . A wide range of items, from switchgear, transformers, and motor control centers to cabling, earthing, and lighting, are required. Normally, competitive quotations would be obtained to take an estimate beyond the study stage. 

To the basic current requirement is applied the derating faetors for various service conditions, as noted in Section 1.5.4.2. The equipment, devices and components may then be cbosen to be as close (nearest higher) to this rating as possible from the available standard ratings. Based on these ratings, the minimum cross-sectional areas of the other current-carrying parts used in the circuit, such as interconnecting links and the cables-are calculated. 

Appendix 1 Selection of Power cables 16/531 A 16.1 Introduction 16/531 A16.2 Technical details 16/544 A16.3 Service conditions 16/544 A 16.4 Recommended derating factors 16/544 A 16.5 Voltage drop 16/544... 

These are heat- and flameproof cables suitable for high fire risk zones. In severe fire conditions, when the outer protection and insulation have been destroyed, these cables would still maintain continuity of essential services. 

Polymer cable anodes are made of a conducting, stabilized and modified plastic in which graphite is incorporated as the conducting material. A copper cable core serves as the means of current lead. The anode formed by the cable is flexible, mechanically resistant and chemically stable. The cable anodes have an external diameter of 12.7 mm. The cross-section of the internal copper cable is 11.4 mm and its resistance per unit length R is consequently 2 mQ m l The maximum current delivery per meter of cable is about 20 mA for a service life of 10 years. This corresponds to a current density of about 0.7 A m. Using petroleum coke as a backfill material allows a higher current density of up to a factor of four. 

Where there is available ground and the specific resistivity of soil in the upper layers is low, the anodes are laid horizontally [3]. A trench 0.3 to 0.5 m wide and 1.5 to 1.8 m deep is dug with, for example, an excavator or trench digger (see Fig. 9-2). A layer of coke 0.2-m thick is laid on the bottom of the trench. The impressed current anodes are placed on this and covered with a 0.2-m layer of coke. Finally the trench is filled with the excavated soil. No. IV coke with a particle size of 5 to 15 mm and specific gravity of 0.6 t m" is backfilled at a rate of 50 kg per meter of trench. The anodes are connected in parallel and every three to four anode cables are connected to the anode header cable by a mechanical cable crimp encapsulated in an epoxy splice kit to give an economical service life at high current output. 

The installation costs for a single impressed current anode of high-silicon iron can be taken as Kj = DM 975 (S550). This involves about 5 m of cable trench between anodes so that the costs for horizontal or vertical anodes or for anodes in a common continuous coke bed are almost the same. To calculate the total costs, the annuity factor for a trouble-free service life of 20 years (a = 0.11, given in Fig. 22-2) should be used. For the cost of current, an industrial power tariff of 0.188 DM/kWh should be assumed for t = 8750 hours of use per year, and for the rectifier an efficiency of w = 0.5. The annual basic charge of about DM 152 for 0.5 kW gives about 0.0174 DM/kWh for the calculated hours of use, so that the total current cost comes to... 

In 110-kV high-voltage grids, gas pressure cables (external and internal gas pressure cables) are mainly laid in steel conduit. In service, the steel pipe is filled with nitrogen at a gas pressure of 15 to 16 bar. Figure 14-1 shows the cross-section of such an external gas pressure cable. 

Vulcanised (cross-linked) polyethylene is being used for cable application where service temperatures up to 90°C are encountered. Typical cross-linking agents for this purpose are peroxides such as dicumyl peroxide. The use of such agents is significantly cheaper than irradiation processes for the cross-linking of the polymer. An alternative process involves the use of vinyl silanes (see Section 10.9). 

For cables such as in elevators or cranes, the service life might be based on 95% of the fatigue life of the material. In such circumstances, a composite cable would clearly last far longer than a metal cable. Moreover, the composite cable length, if measured, would be found to be longer than originally as time passes (an elevator would have to be periodically adjusted to stop precisely at each floor). Such measurements when recorded would be an evidential record of the cable per-... 

Cabled housing with electronic service and alarm signal... 

Service Supplied and Consumed, by Mode, in the United States, 1997. NOTE "Other includes ferryboat, inclined plane, automated guideway, monorail, aerial tramway, and cable car. 

ELECTRICAL CABLE, AND WINDINGS, ETC. FOR HIGH VOLTAGE SERVICE... 

In oilfield service, wire rope is often referred to as wire line or cable. For clarity, these various expressions are incorporated in this recommended practice. 

The major uses of lead in the UK are in batteries, and in sheet and pipe of which the vast majority is sheet for building purposes. These applications account for about one third each of lead used. This situation is unique, since in all other countries batteries account for most of the lead market. A small but very important application is sheet and pipe for the chemical industry. Lead is no longer installed for water services. Lead cable sheathing which accounts for 5% is in general decline, but is valued in niche applications such as on oil rigs where resistance to hydrocarbons is important. The use of lead for anodes accounts for a very small tonnage, but is still of great importance to the industries which use them. 

An electric railway or tramway system with an adjacent buried pipeline or cable which may cross the running rails at intervals is illustrated in Fig. 10.35 in which the arrows indicate the general flow of stray currents when one vehicle is in service. Rapid variations of current and potentials will occur as the tram or train moves along the rails. Corrosion will occur at points near the sub-station or near negative feeders where the stray current leaves the buried structure to return to the negative busbar at the sub-station. 

The amount of corrosion damage resulting from the operation of d.c. railways is generally less than the corrosion caused by street tramway systems since the railway track insulation is better, the frequency of service is less, and pipes and cables are usually buried further from the running rails. 

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