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  2. Insulator (electricity) - Wikipedia

    en.wikipedia.org/wiki/Insulator_(electricity)

    Insulators used for high-voltage power transmission are made from glass, porcelain or composite polymer materials. Porcelain insulators are made from clay, quartz or alumina and feldspar, and are covered with a smooth glaze to shed water. Insulators made from porcelain rich in alumina are used where high mechanical strength is a criterion.

  3. Polybutylene terephthalate - Wikipedia

    en.wikipedia.org/wiki/Polybutylene_terephthalate

    Polybutylene terephthalate (PBT) is a thermoplastic engineering polymer that is used as an insulator in the electrical and electronics industries. [2] It is a thermoplastic (semi-)crystalline polymer, and a type of polyester.

  4. Magnet wire - Wikipedia

    en.wikipedia.org/wiki/Magnet_wire

    Inductor made with magnet wire wound around a toroidal core. Magnet wire [1] or enameled wire is a copper or aluminium wire coated with a very thin layer of insulation.It is used in the construction of transformers, inductors, motors, generators, speakers, headphones, hard disk head actuators, electromagnets, electric guitar pickups, and other applications that require tight coils of insulated ...

  5. Comparative Tracking Index - Wikipedia

    en.wikipedia.org/wiki/Comparative_Tracking_Index

    The Comparative Tracking Index (CTI) is used to measure the electrical breakdown (tracking) properties of an insulating material. Tracking is an electrical breakdown on the surface of an insulating material wherein an initial exposure to electrical arcing heat carbonizes the material. The carbonized areas are more conductive than the pristine ...

  6. How a rural Alabama school system outdid the country with ...

    www.aol.com/news/rural-alabama-school-system...

    PIEDMONT, Ala. (AP) — While the rest of the country’s schools were losing ground in math during the COVID pandemic, student performance in a rural Alabama school district was soaring.

  7. List of insulation materials - Wikipedia

    en.wikipedia.org/wiki/List_of_insulation_materials

    This is a list of insulation materials used around the world. ... Thinsulate clothing insulation [4] 2.54: 1 0.28–0.51: 1.6–2.9: 11–20 Urea-formaldehyde panels