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The original NEC, later known as NEC-1 after NEC-2 was introduced, was a modification of the earlier AMP2, adding a more accurate current expansion along wires and at multiple wire junctions, and an option in the wire modeling for far greater accuracy on thick wires.
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. It is part of the National Fire Code series published by the National Fire Protection Association (NFPA), a private trade association . [ 1 ]
The National Electrical Safety Code (NESC) or ANSI Standard C2 is a United States standard of the safe installation, operation, and maintenance of electric power and communication utility systems including power substations, power and communication overhead lines, and power and communication underground lines.
The NEC contracts now form a suite of contracts, with NEC being the brand name for the "family" of contracts. [16] When it was first launched in 1993, it was simply the "New Engineering Contract". This specific contract has been renamed the "Engineering and Construction Contract" which is the main contract used for any construction based project.
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NEC Laboratories America was created in November 2002 through the merger of NEC Research Institute and NEC USA's Computer and Communications Research Laboratory. [14] NEC Laboratories succeeded in sending over 100 terabits of information per second through a single optical fibre in April 2011, establishing a new world record. [15]
COBie was developed by Bill East, of the US Army Corps of Engineers, while at the Construction Engineering Research Laboratory in 2007. [3] The project was funded with an initial grant from the US National Aeronautics and Space Administration and the White House Office of Science and Technology Policy (through National Institute of Standards and Technology).
According to the NEC, the purpose of connecting an electrical system to the physical ground (earth) is to limit the voltage imposed by lightning events and contact with higher voltage lines. In the past, water supply pipes were used as grounding electrodes, but due to the increased use of plastic pipes, which are poor conductors, the use of a ...