Power Cable, Nebraska is a fiction town in United States used as a generic placename (that is, where people like A. N. Other live). It may have originated with Terry Pratchett, who dedicated ''Sourcery'' to its inhabitants, and set a scene in ''Good Omens'' there. It generally seems to be a somewhat disparaging reference, apparently being home to the sort of people who contribute to the low opinion some United Kingdom people have of American culture; as in "The way the system works, the British TV schedules are decided by the Nielsen ratings in Power Cable, Nebraska." It is used in this context by Americans as well as the British. Fictional towns and cities
Power cable (a type of electrical cable) is an assembly of two or more electrical conductor (material) held together with, and typically covered with, an overall sheath. The conductors may be of the same or different sizes, each with their own insulation and possibly a bare conductor. Larger single conductor insulated cables are also called power cables in the trade. A hybrid cable may also include other conductors (such as fiber optics), Mains electricity conductors, low-voltage data signalling or control conductors, and radio frequency conductors (such as coaxial cable). The sheath may be of metal, plastic, ceramic, shielded, sunlight-resistant, waterproof, oil-resistant, fire-retardant, flat or round, and may also contain structural supports such as Kevlar, aerial wire, or other high-strength materials. Common types of general-purpose cables used by electricians are defined by national or international regulations or codes. In the USA the definition is contained in the National Electrical Code (US) or other International standards and are generally defined according to the conductors and the materials used, shape, and intended usage for the sheath. The conductors are usually copper or aluminum, stranded, solid, and of various diameters as determined by the required amperage of the application. As mentioned, they may be individually insulated or bare. There may also be one or more conductive sheaths for mechanical protection, equalization of the electric stress on cable insulation (in circuits above 2400 volts) and for collecting the a/c leakage currents. Conductive sheaths will not reduce magnetic induction from cable to cables in circuits carrying large currents. These conducting sheaths are bonded to earth through connection to equipment enclosures or by a dedicated grounding conductor. For example, NEC ''Type UF'' (underground feeder) is a non-metallic, moisture-resistant jacket containing conductors having moisture-resistant insulation suitable for direct burial in the earth or in interiors in wet, dry,or corrosive locations. Type AC is a fabricated assembly of insulated conductors in a flexible metallic enclosure. Some are made by twisting an interlocking metal tab or other metallic sheath around the insulated conductors. ''BX'', an early genericized trademark of the General Electric company was used before & during WWII, of particular design. Some AC are rated for the flexible metal to have limited grounding currents. In Canada, type TECK cable, with a flexible aluminum or steel armour and overall flame-retardent PVC jacket, is used in industry for wet or dry locations, run in tray or attached to building structure, above grade or buried in earth. Electrical power cables are often installed in raceways including electrical conduit, and cable trays, which may contain one or more conductors. Conduit may also be rigid or flexible, metallic or non-metallic, and differentiation from cable may require some investigation of the contents at their termination. By comparison, most conduits are arranged so that their contents may be "pulled" or removed from an opening in the conduit, whereas conductors in cables are bundled tightly within the jacket, etc, as a unit. Cables undergo many stresses when being installed, that of tension, and the insulation being crushed at the bends of the temporary pulleys or at the bends of the raceway. Lubrications are used in conduits ahead of the cable to provide less friction, but these must be compatible with the nonmetallic materials of the cable -- a froth of vegetable-oil soap and water is good. The AC component has little resistance to tension. ==Flexible cables== Cables are somewhat flexible, and are packaged in rolls or coils -- larger sizes on reels. However, in applications requiring a cable to be moved repeatedly, a more flexible cable should be used. Small cables are called "cords". Flexible cords contain finer stranded conductors, rather than solid, and have insulation and sheathes that are engineered to withstand the forces of repeated flexing. Heavy duty flexible power cords such as feeding a mine face cutting machine are carefully engineered -- since their life is measurable in (6) weeks! See "Power cord" and "Extension cable" for further description of flexible power cables. Other types of flexible cable include twisted pair, extensible, coaxial cable, shielded cable, and communication cable. == See also == * Electrical wiring Power cables Electric power Electrical cables
See other meanings of words starting from letter:
Words begining with Power_cable:
Power_Cable
Power_cable
Power_Cable,_NE
Power_Cable,_Nebraska
Power_cables
Power Cable
Power Cable, Nebraska is a fiction town in United States used as a generic placename (that is, where people like A. N. Other live). It may have originated with Terry Pratchett, who dedicated ''Sourcery'' to its inhabitants, and set a scene in ''Good Omens'' there. It generally seems to be a somewhat disparaging reference, apparently being home to the sort of people who contribute to the low opinion some United Kingdom people have of American culture; as in "The way the system works, the British TV schedules are decided by the Nielsen ratings in Power Cable, Nebraska." It is used in this context by Americans as well as the British. Fictional towns and cities
Power cable
Power cable (a type of electrical cable) is an assembly of two or more electrical conductor (material) held together with, and typically covered with, an overall sheath. The conductors may be of the same or different sizes, each with their own insulation and possibly a bare conductor. Larger single conductor insulated cables are also called power cables in the trade. A hybrid cable may also include other conductors (such as fiber optics), Mains electricity conductors, low-voltage data signalling or control conductors, and radio frequency conductors (such as coaxial cable). The sheath may be of metal, plastic, ceramic, shielded, sunlight-resistant, waterproof, oil-resistant, fire-retardant, flat or round, and may also contain structural supports such as Kevlar, aerial wire, or other high-strength materials. Common types of general-purpose cables used by electricians are defined by national or international regulations or codes. In the USA the definition is contained in the National Electrical Code (US) or other International standards and are generally defined according to the conductors and the materials used, shape, and intended usage for the sheath. The conductors are usually copper or aluminum, stranded, solid, and of various diameters as determined by the required amperage of the application. As mentioned, they may be individually insulated or bare. There may also be one or more conductive sheaths for mechanical protection, equalization of the electric stress on cable insulation (in circuits above 2400 volts) and for collecting the a/c leakage currents. Conductive sheaths will not reduce magnetic induction from cable to cables in circuits carrying large currents. These conducting sheaths are bonded to earth through connection to equipment enclosures or by a dedicated grounding conductor. For example, NEC ''Type UF'' (underground feeder) is a non-metallic, moisture-resistant jacket containing conductors having moisture-resistant insulation suitable for direct burial in the earth or in interiors in wet, dry,or corrosive locations. Type AC is a fabricated assembly of insulated conductors in a flexible metallic enclosure. Some are made by twisting an interlocking metal tab or other metallic sheath around the insulated conductors. ''BX'', an early genericized trademark of the General Electric company was used before & during WWII, of particular design. Some AC are rated for the flexible metal to have limited grounding currents. In Canada, type TECK cable, with a flexible aluminum or steel armour and overall flame-retardent PVC jacket, is used in industry for wet or dry locations, run in tray or attached to building structure, above grade or buried in earth. Electrical power cables are often installed in raceways including electrical conduit, and cable trays, which may contain one or more conductors. Conduit may also be rigid or flexible, metallic or non-metallic, and differentiation from cable may require some investigation of the contents at their termination. By comparison, most conduits are arranged so that their contents may be "pulled" or removed from an opening in the conduit, whereas conductors in cables are bundled tightly within the jacket, etc, as a unit. Cables undergo many stresses when being installed, that of tension, and the insulation being crushed at the bends of the temporary pulleys or at the bends of the raceway. Lubrications are used in conduits ahead of the cable to provide less friction, but these must be compatible with the nonmetallic materials of the cable -- a froth of vegetable-oil soap and water is good. The AC component has little resistance to tension. ==Flexible cables== Cables are somewhat flexible, and are packaged in rolls or coils -- larger sizes on reels. However, in applications requiring a cable to be moved repeatedly, a more flexible cable should be used. Small cables are called "cords". Flexible cords contain finer stranded conductors, rather than solid, and have insulation and sheathes that are engineered to withstand the forces of repeated flexing. Heavy duty flexible power cords such as feeding a mine face cutting machine are carefully engineered -- since their life is measurable in (6) weeks! See "Power cord" and "Extension cable" for further description of flexible power cables. Other types of flexible cable include twisted pair, extensible, coaxial cable, shielded cable, and communication cable. == See also == * Electrical wiring Power cables Electric power Electrical cables
See other meanings of words starting from letter:
P
PA | PB | PC | PD | PE | PF | PG | PH | PI | PJ | PK | PL | PM | PN | PO | PR | PS | PT | PU | PW | PX | PY | PZ |Words begining with Power_cable:
Power_Cable
Power_cable
Power_Cable,_NE
Power_Cable,_Nebraska
Power_cables
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