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  2. Physikalisch-Technische Bundesanstalt - Wikipedia

    en.wikipedia.org/wiki/Physikalisch-Technische...

    The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute of the Federal Republic of Germany, with scientific and technical service tasks.It is a higher federal authority and a public-law institution directly under federal government control, without legal capacity, under the auspices of the Federal Ministry for Economic Affairs and Climate Action.

  3. Knob-and-tube wiring - Wikipedia

    en.wikipedia.org/wiki/Knob-and-tube_wiring

    Knob-and-tube wiring (sometimes abbreviated K&T) is an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1930s.

  4. National Electrical Code - Wikipedia

    en.wikipedia.org/wiki/National_Electrical_Code

    Electrical installations. 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]

  5. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    A CAGE code is a unique identifier to label an entity (that is, a specific government agency or corporation at a specific site) that is a CDA, ODA, or MFR of the part defined by the drawing. One corporation can have many CAGE codes, as can one government, because each division, department, and site (campus) can have its own CAGE code.

  6. National Electrical Safety Code - Wikipedia

    en.wikipedia.org/.../National_Electrical_Safety_Code

    National Electrical Safety Code. 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.

  7. Electrical code - Wikipedia

    en.wikipedia.org/wiki/Electrical_code

    v. t. e. An electrical code is a set of regulations for the design and installation of electrical wiring in a building. The intention of a code is to provide standards to ensure electrical wiring systems that are safe for people and property. Such wiring is subject to rigorous safety standards for design and installation.

  8. Telecommunications power cable - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_power_cable

    Telecommunications power cable is intended for use in AC/DC distribution circuits, wireways, racks, and conduits installed in telecommunications Central Offices (COs), transmission stations, cell-tower sites, and other remote sites. These environments are normally dry, but cables may be placed in partially covered or protected porches, crawl ...

  9. Canadian Electrical Code - Wikipedia

    en.wikipedia.org/wiki/Canadian_Electrical_Code

    t. e. The Canadian Electrical Code, CE Code, or CSA C22.1 is a standard published by the Canadian Standards Association pertaining to the installation and maintenance of electrical equipment in Canada. The first edition of the Canadian Electrical Code was published in 1927. [ 1] The current (25th) edition was published in April of 2021.

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