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In both those instances the white wire should be identified as being hot, usually with black tape inside junction boxes. The neutral wire is identified by gray or white insulated wire, perhaps using stripes or markings. With lamp cord wire the ribbed wire is the neutral, and the smooth wire is the hot. NEC 2008 400.22(f) allows surface marking ...
A standard wire gauge. The British Standard Wire Gauge, often referred to as the Standard Wire Gauge or simply SWG, is a unit used to denote wire gauge (size) as defined by BS 3737:1964, a standard that has since been withdrawn. It is also known as the Imperial Wire Gauge or British Standard Gauge. Although its use has significantly declined ...
Sample cross-section of high tension power (pylon) line, showing 1 strand (7 wires) of steel surrounded by 4 concentric layers of aluminium. Aluminum conductor steel-reinforced cable (ACSR) is a type of high-capacity, high-strength stranded conductor typically used in overhead power lines.
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Piano string ends Piano strings. Piano wire, or "music wire", is a specialized type of wire made for use in piano strings but also in other applications as springs.It is made from tempered high-carbon steel, also known as spring steel, which replaced iron as the material starting in 1834.
The Barbed Wire Patent Case, 143 U.S. 275 was a significant patent dispute in 1892 between plaintiff Joseph Glidden and the USPTO regarding the right of barbed wire. Lucian Smith was the original inventor in 1867 and held patent rights for it, while Glidden made changes to the production of barbed wire, holding the barbs in place, in 1874 that ...
Commonly known as the Yellow Sheet, [1] the magazine was launched in 1925. [2] It was used as a standard for both transacted containerboard pricing (linerboard and medium) and multiple grades of recovered paper stock pricing. [3] [4] It was also used to track linerboard prices as an economic indicator. [5]