About: Knob-and-tube wiring

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Knob-and-tube wiring (sometimes abbreviated K&T) is an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1930s. It consisted of single-insulated copper conductors run within wall or ceiling cavities, passing through joist and stud drill-holes via protective porcelain insulating tubes, and supported along their length on nailed-down porcelain knob insulators. Where conductors entered a wiring device such as a lamp or switch, or were pulled into a wall, they were protected by flexible cloth insulating sleeving called loom. The first insulation was asphalt-saturated cotton cloth, then rubber became common. Wire splices in such installations were twisted together for good mechanical strength, then soldered and wrapped with rubber

Attributes	Values
rdf:type	software
rdfs:label	Knob-and-tube wiring (en) がいし引き工事 (ja)
rdfs:comment	がいし引き工事（がいしびきこうじ）とは、電気工事の施工方法の一種である。造営材に取り付けたがいし（碍子）で電線を支持し配線する工法で、この工事による配線をがいし引き配線ともいう。 (ja) Knob-and-tube wiring (sometimes abbreviated K&T) is an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1930s. It consisted of single-insulated copper conductors run within wall or ceiling cavities, passing through joist and stud drill-holes via protective porcelain insulating tubes, and supported along their length on nailed-down porcelain knob insulators. Where conductors entered a wiring device such as a lamp or switch, or were pulled into a wall, they were protected by flexible cloth insulating sleeving called loom. The first insulation was asphalt-saturated cotton cloth, then rubber became common. Wire splices in such installations were twisted together for good mechanical strength, then soldered and wrapped with rubber (en)
foaf:depiction
dct:subject	Electrical wiring
Wikipage page ID	5444091 (xsd:integer)
Wikipage revision ID	1111090075 (xsd:integer)
Link from a Wikipage to another Wikipage	Electrical wiring National Electrical Code Solder Earthing system Mechanical strength Fuse (electrical) Friction tape Wall stud Joist Junction box Electrical wiring Carter system Home insurance Western Union splice Building insulation Porcelain Copper wire and cable Ground and neutral Thermoplastic-sheathed cable Multiway switching Rat-tail splice T-splice Electrical insulation Ground conductor Three-way switch National Electrical Code (US)
sameAs	Knob-and-tube wiring Knob-and-tube wiring Knob-and-tube wiring Knob-and-tube wiring Knob-and-tube wiring Knob-and-tube wiring Knob-and-tube wiring
dbp:wikiPageUsesTemplate	dbt:Electrical_Wiring_Sidebar dbt:Cite_book dbt:Cn dbt:Commons dbt:Fact dbt:More_references dbt:Reflist dbt:Short_description
thumbnail	wiki-commons:Special:FilePath/Knob_and_tube_1930.jpg?width=300
has abstract	Knob-and-tube wiring (sometimes abbreviated K&T) is an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1930s. It consisted of single-insulated copper conductors run within wall or ceiling cavities, passing through joist and stud drill-holes via protective porcelain insulating tubes, and supported along their length on nailed-down porcelain knob insulators. Where conductors entered a wiring device such as a lamp or switch, or were pulled into a wall, they were protected by flexible cloth insulating sleeving called loom. The first insulation was asphalt-saturated cotton cloth, then rubber became common. Wire splices in such installations were twisted together for good mechanical strength, then soldered and wrapped with rubber insulating tape and friction tape (asphalt saturated cloth), or made inside metal junction boxes. Knob and tube wiring was eventually displaced from interior wiring systems because of the high cost of installation compared with use of power cables, which combined both power conductors of a circuit in one run (and which later included grounding conductors). At present, new knob and tube installations are permitted in the U.S. only in a few very specific situations listed in the National Electrical Code, such as certain industrial and agricultural environments. (en) がいし引き工事（がいしびきこうじ）とは、電気工事の施工方法の一種である。造営材に取り付けたがいし（碍子）で電線を支持し配線する工法で、この工事による配線をがいし引き配線ともいう。 (ja)
gold:hypernym	Method
prov:wasDerivedFrom	wikipedia-en:Knob-and-tube_wiring?oldid=1111090075&ns=0
page length (characters) of wiki page	16302 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Knob-and-tube_wiring
is Link from a Wikipage to another Wikipage of	Samuel Penney House National Electrical Code K&T Residual-current device Multiway switching Knob and tube wiring T-splice Cleated wiring Knob-and-tube Knob and tube
is Wikipage redirect of	K&T Knob and tube wiring Cleated wiring Knob-and-tube Knob and tube
is foaf:primaryTopic of	wikipedia-en:Knob-and-tube_wiring

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