Filler 2 : A material used in multiconductorcable to occupy large interstices formed by the cable assembly. Also, a material added to an insulation compound to add volume and increase impact resistance
Young & Company Electric Power Products and Related Engineering Services, Glossary of Electrical Terms, http://www.youngco.com/young2.asp?ID=4&Type=3, CA., USA 2001. (Electr Sfty - Amer) {514}