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  2. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    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 ...

  3. Thermoplastic-sheathed cable - Wikipedia

    en.wikipedia.org/wiki/Thermoplastic-sheathed_cable

    In North America, this type of cable is designated as NM cable. NM means "nonmetallic", referring to the outer sheathing; the conductors are still metallic. 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]

  4. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    Diagram of a simple electrical cable with three insulated conductors, with IEC colour scheme. About 1950, PVC insulation and jackets were introduced, especially for residential wiring. About the same time, single conductors with a thinner PVC insulation and a thin nylon jacket (e.g. US Type THN, THHN, etc.) became common. [citation needed]

  5. Mineral-insulated copper-clad cable - Wikipedia

    en.wikipedia.org/wiki/Mineral-insulated_copper...

    Mineral-insulated copper-clad cable is a variety of electrical cable made from copper conductors inside a copper sheath, insulated by inorganic magnesium oxide powder. The name is often abbreviated to MICC or MI cable, and colloquially known as pyro (because the original manufacturer and vendor for this product in the UK was a company called ...

  6. Power cable - Wikipedia

    en.wikipedia.org/wiki/Power_cable

    A power cable is an electrical cable, an assembly of one or more electrical conductors, usually held together with an overall sheath. The assembly is used for transmission of electrical power . Power cables may be installed as permanent wiring within buildings, buried in the ground, run overhead, or exposed.

  7. Electrical cable - Wikipedia

    en.wikipedia.org/wiki/Electrical_cable

    Non-metallic sheathed cable (or nonmetallic building wire, NM, NM-B) [6] Armored cable (or BX) [6] Multicore cable (consist of more than one wire and is covered by cable jacket) Paired cable – Composed of two individually insulated conductors that are usually used in DC or low-frequency AC applications; Portable cord – Flexible cable for AC ...