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The conduit methods were known to be of better quality, but cost significantly more than K&T. [2] In 1909, flexible armored cable cost about twice as much as K&T, and conduit cost about three times the price of K&T. [6] Knob and tube wiring persisted since it allowed owners to wire a building for electricity at lower cost.
2 Locating Knob and Tube. 2 comments. 3 First sentence- copied from elsewhere or vice-versa? 5 comments. 4 Requested move 8 February 2015. 4 comments.
Knob and tube wiring, 1880s–1930s, using asphalt-saturated cloth or later rubber insulation; Armored cable, known by the genericized trademark "BX" - flexible steel sheath with two cloth-covered, rubber-insulated conductors [4] - introduced in 1906 but more expensive than open single conductors
12. Office Chairs. Fixing broken wheels or armrests can be pricey, especially on cheaper models. While some office chairs exceed $100 in price, there are less expensive ones that can be purchased ...
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A knob-and-tube installation uses wires suspended in air. This gives them a greater heat dissipation rating than standard three-wire NM-2 cable , which includes two tightly bundled load and return wires.