An outlet cladding of an optical aerial cable for overhead high-tension lines is formed of a material that is self-quenching and resistant to partial discharge and tracking current. An additive of metal hydroxide is provided in the outer cladding for this purpose....http://www.google.es/patents/US4673247?utm_source=gb-gplus-sharePatente US4673247 - Optical cable for overhead high-tension lines
