Direct current electrical field induced formation of an electrically conductive network in carbon nanoparticle/silicone oil suspensions were studied in this work. Suspensions with various concentrations of multi wall carbon nanotubes, conductive carbon black and graphene nanoplatelets were made and electrical resistivity change in time were determined at various electrostatic field intensities from 50 V/cm to 250 V/cm. It has been observed that electrical field significantly reduces electrical resistance of suspensions in field direction indicating that orientation of carbon nanoparticles takes place in silicone suspensions. The influence of silicone oil viscosity on electrical field induced orientation of carbon nanoparticles has been studied as well. Based on these results the impact of electrical field induced carbon nanoparticle orientation in suspensions has been evaluated. These results will be used to produce orientated polymer/carbon nanoparticle composite manufacture.