non-metallic sheath applied over a covering, generally metallic, ensuring the protection of the cable from the outside NOTE 1 - In North America, the term sheath is generally used for metallic coverings, whereas the term jacket is used only for non-metallic coverings. NOTE 2 - In case of special bonding, the oversheath may provide electrical insula...
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=461-05-04
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