141:
133:
242:
366:
223:
475:
376:
36:
211:
394:. Likewise, any conductor or cable will pick up energy from any existing electromagnetic field around it. These effects are often undesirable, in the first case amounting to unwanted transmission of energy which may adversely affect nearby equipment or other parts of the same piece of equipment; and in the second case, unwanted pickup of
448:
A twisted pair has two wires of a cable twisted around each other. This can be demonstrated by putting one end of a pair of wires in a hand drill and turning while maintaining moderate tension on the line. Where the interfering signal has a wavelength that is long compared to the pitch of the twisted
444:
Coaxial design helps to further reduce low-frequency magnetic transmission and pickup. In this design the foil or mesh shield has a circular cross section and the inner conductor is exactly at its center. This causes the voltages induced by a magnetic field between the shield and the core conductor
273:
Physically, an electrical cable is an assembly consisting of one or more conductors with their own insulations and optional screens, individual coverings, assembly protection and protective coverings. Electrical cables may be made more flexible by stranding the wires. In this process, smaller
466:. Alternately, fire spread amongst combustible cables can be prevented by the application of fire retardant coatings directly on the cable exterior, or the fire threat can be isolated by the installation of boxes constructed of noncombustible materials around the bulk cable installation.
405:
The first solution to these problems is to keep cable lengths in buildings short since pick up and transmission are essentially proportional to the length of the cable. The second solution is to route cables away from trouble. Beyond this, there are particular cable designs that minimize
269:
for lighting, power and control circuits permanently installed in buildings. Since all the circuit conductors required can be installed in a cable at one time, installation labor is saved compared to certain other wiring methods.
182:
from one device to the other. Physically, an electrical cable is an assembly consisting of one or more conductors with their own insulations and optional screens, individual coverings, assembly protection and protective covering.
298:
easier. Tinning is also used to provide lubrication between strands. Tinning was used to help removal of rubber insulation. Tight lays during stranding makes the cable extensible (CBA – as in telephone handset cords).
457:
Electrical cable jacket material is usually constructed of flexible plastic which will burn. The fire hazard of grouped cables can be significant. Cables jacketing materials can be formulated to prevent fire spread
274:
individual wires are twisted or braided together to produce larger wires that are more flexible than solid wires of similar size. Bunching small wires before concentric stranding adds the most flexibility.
441:. A grounded shield on cables operating at 2.5 kV or more gathers leakage current and capacitive current, protecting people from electric shock and equalizing stress on the cable insulation.
253:
Electrical cables are used to connect two or more devices, enabling the transfer of electrical signals or power from one device to the other. Long-distance communication takes place over
425:. The cable is encased for its entire length in foil or wire mesh. All wires running inside this shielding layer will be to a large extent decoupled from external
190:
may be formed into a cable assembly, which is not necessarily suitable for connecting two devices but can be a partial product (e.g. to be soldered onto a
318:) which was found useful for underwater cables in the 19th century. The first, and still very common, man-made plastic used for cable insulation was
594:– This type of cable is a flat two-wire line. It is commonly called a 300 Ω line because the line has an impedance of 300 Ω. It is often used as a
561:
531:
611:
HD 361 is a ratified standard published by CENELEC, which relates to wire and cable marking type, whose goal is to harmonize cables.
237:
rapidly spreading through the burning of cable insulation, a phenomenon of great importance for cables used in some installations.
306:
using cloth, rubber or paper. Plastic materials are generally used today, except for high-reliability power cables. The first
100:
72:
552:– Useful when many wires are required. This type of cable can easily flex, and it is designed to handle low-level voltages.
695:
Ash, Stewart, "The development of submarine cables", ch. 1 in, Burnett, Douglas R.; Beckman, Robert; Davenport, Tara M.,
461:
79:
812:
802:
704:
119:
53:
612:
718:
604:– Consists of two interwound insulated wires. It resembles a paired cable, except that the paired wires are twisted
86:
534:– Composed of two individually insulated conductors that are usually used in DC or low-frequency AC applications
57:
17:
449:
pair, alternate lengths of wires develop opposing voltages, tending to cancel the effect of the interference.
68:
254:
513:
773:"Electrical Wiring FAQ (Part 2 of 2)Section - What is Romex/NM/NMD? What is BX? When should I use each?"
598:
between an antenna and a receiver (e.g., TV and radio). These cables are stranded to lower skin effects.
326:
during which a telegraph cable using it was laid across the
English Channel to support troops following
853:
407:
650:
772:
826:
303:
46:
576:
558:– Used for sensitive electronic circuits or to provide protection in high-voltage applications.
93:
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191:
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430:
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which may mask the desired signal being carried by the cable, or, if the cable is carrying
164:
8:
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261:
are used for bulk transmission of alternating and direct current power, especially using
671:
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fields, particularly if the shield is connected to a point of constant voltage, such as
571:
402:
or control voltages, pollute them to such an extent as to cause equipment malfunction.
262:
194:
with a connector mounted to the housing). Cable assemblies can also take the form of a
807:
BICC Cables Ltd, "Electric Cables
Handbook", WileyBlackwell; London 3rd Edition 1997,
406:
electromagnetic pickup and transmission. Three of the principal design techniques are
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645:
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145:
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Electrical cables are used to connect two or more devices, enabling the transfer of
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487:
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354:
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168:
149:
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may be bare, or they may be plated with a thin layer of another metal, most often
525:
322:. This was invented in 1930, but not available outside military use until after
266:
832:
825:
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498:
433:. Simple shielding of this type is not greatly effective against low-frequency
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Cables can be securely fastened and organized, such as by using trunking,
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323:
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365:
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625:
334:
302:
In the 19th century and early 20th century, electrical cable was often
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338:
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or some other material. Tin, gold, and silver are much less prone to
226:
35:
445:
to consist of two nearly equal magnitudes which cancel each other.
375:
214:
6 inch (15 cm) outside diameter, oil-cooled cables, traversing the
608:
723:
Systems Safety
Technology Division, Sandia National Laboratories
295:
287:
230:
218:
throughout. An example of a heavy cable for power transmission.
210:
175:
831:
528:(consist of more than one wire and is covered by cable jacket)
437:
fields, however - such as magnetic "hum" from a nearby power
327:
315:
291:
27:
Assembly of one or more wires running side by side or bundled
615:(DIN, VDE) has released a similar standard (DIN VDE 0292).
565:
283:
234:
160:
279:
421:
Shielding makes use of the electrical principle of the
751:
540:– Flexible cable for AC power in portable applications
186:
One or more electrical cables and their corresponding
294:
than copper, which may lengthen wire life, and makes
163:
running side by side or bundled, which is used as an
390:-carrying conductor, including a cable, radiates an
719:"Burn Mode Analysis of Horizontal Cable Tray Fires"
486:– used for radio frequency signals, for example in
60:. Unsourced material may be challenged and removed.
845:
697:Submarine Cables: The Handbook of Law and Policy
717:Krause, Fritz; Schmidt, Willard (2 Jan 1982).
716:
265:. Electrical cables are extensively used in
756:Building and Fire Research Laboratory, NIST
202:, used to connect many terminals together.
564:(from time to time this name is used for
120:Learn how and when to remove this message
795:The History of Electric Wires and Cables
546:– A cable used for transmission of power
516:(or nonmetallic building wire, NM, NM-B)
478:A 250 V, 16 A electrical cable on a reel
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240:
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14:
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249:(254 mm) single conductor power cable
752:"Fire Performance of Wire and Cable"
699:, Martinus Nijhoff Publishers, 2014
58:adding citations to reliable sources
29:
750:Vytenis, Babrauskas (12 Jan 1981).
462:Mineral-insulated copper-clad cable
349:used in moving applications within
148:cable with three 2.5 mm solid
24:
787:
762:
452:
360:
25:
865:
818:
739:. 2017. pp. 648, 800.179(A).
834:The New Student's Reference Work
737:NFPA 72 National Electrical Code
34:
797:, Peter Pergrinus, London 1983
45:needs additional citations for
743:
729:
710:
689:
664:
613:Deutsches Institut für Normung
159:is an assembly of one or more
13:
1:
725:. NUREG/CR-2431, SAND81-0079.
657:
255:undersea communication cables
7:
672:"What Is a Cable Assembly?"
618:
514:Non-metallic sheathed cable
459:
10:
870:
827:"Cables, Electric"
651:Over/under cable coiling
469:
136:Electrical cable diagram
276:Copper wires in a cable
205:
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383:
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250:
238:
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490:distribution systems.
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392:electromagnetic field
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355:strain relief devices
353:can be secured using
345:. Continuous-flex or
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192:printed circuit board
143:
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165:electrical conductor
54:improve this article
494:Direct-buried cable
572:Structured cabling
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263:high-voltage cable
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176:electrical signals
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138:
69:"Electrical cable"
854:Electrical cables
646:Circuit integrity
596:transmission line
577:Submersible cable
150:copper conductors
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16:(Redirected from
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631:Cable management
488:cable television
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216:Grand Coulee Dam
169:electric current
157:electrical cable
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526:Multicore cable
499:Flexible cables
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453:Fire protection
431:earth or ground
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361:Characteristics
357:or cable ties.
347:flexible cables
267:building wiring
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414:geometry, and
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351:cable carriers
282:but sometimes
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110:September 2017
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18:Electric cable
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71: –
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65:Find sources:
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43:This article
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32:
31:
19:
833:
794:
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745:
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691:
679:. Retrieved
675:
666:
607:
602:Twisted pair
587:Twinax cable
562:Single cable
550:Ribbon cable
532:Paired cable
509:Heliax cable
504:Filled cable
456:
447:
443:
434:
426:
423:Faraday cage
420:
416:twisted-pair
404:
400:power supply
385:
380:Twisted pair
343:cable lacing
332:
320:polyethylene
312:gutta-percha
301:
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259:Power cables
252:
247:circular mil
185:
173:
156:
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116:
107:
97:
90:
83:
76:
64:
52:Please help
47:verification
44:
636:Cable gland
544:Power cable
439:transformer
335:cable trays
324:World War 2
314:(a natural
658:References
641:Cable reel
626:Wire gauge
427:electrical
418:geometry.
339:cable ties
233:, showing
196:cable tree
188:connectors
80:newspapers
592:Twin-lead
408:shielding
310:used was
304:insulated
296:soldering
292:oxidation
227:Fire test
167:to carry
144:Flexible
848:Category
777:faqs.org
676:wiseGEEK
619:See also
435:magnetic
245:500,000
839:. 1914.
609:CENELEC
522:(or BX)
412:coaxial
388:current
382:cabling
94:scholar
836:
811:
801:
703:
681:1 July
288:silver
231:Sweden
96:
89:
82:
75:
67:
758:: 56.
470:Types
460:(see
396:noise
328:D-Day
316:latex
180:power
161:wires
146:mains
101:JSTOR
87:books
809:ISBN
799:ISBN
701:ISBN
683:2019
566:wire
386:Any
284:gold
235:fire
206:Uses
73:news
341:or
330:.
280:tin
229:in
198:or
178:or
171:.
155:An
56:by
850::
830:.
775:.
764:^
754:.
721:.
674:.
410:,
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568:)
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117:(
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98:·
91:·
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50:.
20:)
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