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  2. Plenum cable - Wikipedia

    en.wikipedia.org/wiki/Plenum_cable

    The fire requirements on riser cable are not as strict. Thus, plenum cable can always replace riser cable, but riser cable cannot replace plenum cable in plenum spaces. Both plenum and riser cables commonly include a rope or polymer filament with high tensile strength, which helps support the weight of the cable when it is dangling in an open ...

  3. 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 ...

  4. Electric fence - Wikipedia

    en.wikipedia.org/wiki/Electric_fence

    Charger for a plus-minus net fence. An electric fence is a barrier that uses electric shocks to deter humans and other animals [note 1] from crossing a boundary. The voltage of the shocks may cause discomfort or death. Most electric fences are used for agricultural purposes and other non-human animal control.

  5. Dropped ceiling - Wikipedia

    en.wikipedia.org/wiki/Dropped_ceiling

    While twisted pair cable for networking and telephone service is the most common form of plenum cable, coaxial cable also needs to be plenum-rated for safety. High-voltage electrical equipment (generally regarded as being over 50 V) is not permitted to be exposed in the plenum space above a drop ceiling but must be enclosed in conduit or ...

  6. National Electrical Code - Wikipedia

    en.wikipedia.org/wiki/National_Electrical_Code

    The temperature rating of a wire or cable is generally the maximum safe ambient temperature that the wire can carry full-load power without the cable insulation melting, oxidizing, or self-igniting. A full-load wire does heat up slightly due to the metallic resistance of the wire, but this wire heating is factored into the cable's temperature ...

  7. Aluminum building wiring - Wikipedia

    en.wikipedia.org/wiki/Aluminum_building_wiring

    The first 8000 series electric conductor alloy, still widely used in some applications, was developed and patented in 1972 by Aluminum Company of America . [8] This alloy, along with AA-8030 (patented by Olin in 1973) and AA-8176 (patented by Southwire in 1975 and 1980), performs mechanically like copper.

  8. Electrical conduit - Wikipedia

    en.wikipedia.org/wiki/Electrical_conduit

    Electrical conduit provides very good protection to enclosed conductors from impact, moisture, and chemical vapors. Varying numbers, sizes, and types of conductors can be pulled into a conduit, which simplifies design and construction compared to multiple runs of cables or the expense of customized composite cable.

  9. MC4 connector - Wikipedia

    en.wikipedia.org/wiki/MC4_connector

    The MC in MC4 stands for the manufacturer Multi-Contact (now Stäubli Electrical Connectors) and the 4 for the 4 mm diameter contact pin. MC4s allow strings of panels to be easily constructed by pushing the compatible connectors from adjacent panels together by hand, but require a tool to disconnect them to ensure they do not accidentally ...