![]() ![]() ^ NFPA 70-2011 National Electrical Code 2011 Edition Archived at the Wayback Machine.Lloyd, Bariatric Magnetic Apparatus and Method of Manufacturing Thereof, US patent US 8481076, 9 July 2013. ^ Edwin James Houston, A Dictionary of Electrical Words, Terms and Phrases, p.^ "Energy Acronyms", California Energy Commission.^ "Popular Acronyms" Archived at the Wayback Machine.Number 8 wire, a term used in the New Zealand vernacular.Standard Wire Gauge (SWG), the British imperial standard BS3737, superseded by the metric.American Wire Gauge (AWG), used primarily in the US and Canada.IEC 60228, the metric wire-size standard used in most parts of the world.Note: For smaller wires, consult American wire gauge § Tables of AWG wire sizes. Stranded wire is larger in diameter to allow for gaps between the strands, depending on the number and size of strands. The diameter in the table below is that of a solid rod with the given conductor area in circular mils. Standard sizes are from 250 to 400 in increments of 50 kcmil, 400 to 1000 in increments of 100 kcmil, and from 1000 to 2000 in increments of 250 kcmil. For example, one common wire size used in the NEC has a conductor diameter of 0.5 inches, or 500 mils, and thus a cross-section of 500 2 = 250,000 and the calculated result would be 211,600 circular mils. In many NEC publications and uses, large wires may be expressed in thousands of circular mils, which is abbreviated in two different ways: kcmil or MCM. In Canada and the United States, the Canadian Electrical Code (CEC) and the National Electrical Code (NEC), respectively, use the circular mil to define wire sizes larger than 0000 AWG. The area in circular mils, A, of a circle with a diameter of d mils, is given by the formula: As the definition of the unit contains π, it is easy to calculate area values in circular mils when the diameter in mils is known. It is a unit intended for referring to the area of a wire with a circular cross section. It corresponds to approximately 5.067 ×10 −4 mm 2. A circular mil is a unit of area, equal to the area of a circle with a diameter of one mil (one thousandth of an inch or 0.0254 mm). ![]()
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