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NM was first listed and described in the NEC in 1926, but it was invented a few years earlier by the Rome Wire Company in 1922 in Rome, New York, and marketed under the trade name "Romex". [2] Today, the name "Romex" is a trademarked brand of the Southwire Company. [3]
Modern two or three-wire+ground PVC-insulated cable (e.g., NM-B), produced by such brands as Romex [citation needed] Aluminum wire was used in the 1960s and 1970s as a cheap replacement for copper and is still used today, but this is now considered [by whom?] unsafe, without proper installation, due to corrosion, softness and creeping of ...
This type of cable is the least expensive for a given size and is appropriate for dry indoor applications. The designation NM XX-Y indicates, respectively, the type of sheathing (in this case, non-metallic), the size of the main conductors, and the total number of circuit conductors (exclusive of the grounding conductor). For example, NM 14-2 ...
The National Electrical Code, 2008 edition. The National Electrical Code (NEC), or NFPA 70, is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the United States.
Breakdown voltage is a characteristic of an insulator that defines the maximum voltage difference that can be applied across the material before the insulator conducts. In solid insulating materials, this usually [citation needed] creates a weakened path within the material by creating permanent molecular or physical changes by the sudden current.
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In 2017, OM5 has been standardized by TIA and ISO for WDM MMF, specifying not only a minimum modal bandwidth for 850 nm but a curve spanning from 850 to 953 nm. Cables can sometimes be distinguished by jacket color: for 62.5/125 μm (OM1) and 50/125 μm (OM2), orange jackets are recommended, while aqua is recommended for 50/125 μm "laser ...
The NM was Mack's first tactical military vehicle. A 6-ton off-road artillery prime mover used to tow AA guns and crews. Their EY 707 cu in (11.6 L) overhead valve inline 6 cylinder gasoline engine developed 170 hp (130 kW). Models 1, 2, and 3 had the enclosed cab from the commercial L-model and commercial tires. Models 5, 6, 7, and 8 (there ...
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