The use of nanocomposite polymers as electrical insulating materials has been growing rapidly in recent
decades. The base polyethylene properties have been developed by adding small amounts of different fill-
ers to the polyethylene material. It is economically to get polymer development by using cost-fewer
nanoparticles; therefore, polyethylene dielectric properties are trapped by presence cost-fewer nanofil-
lers like clay and fumed silica which are importance in development manufacture of power cables prod-
ucts. Dielectric strength is a vital pointer for quality of insulation materials of electrical power
applications; hence, experimental measurements have been investigated on ac high voltage breakdown
of new cost-fewer polyethylene nanocomposites materials. All experimental results of the new
polyethylene nanocomposites have been compared with conventional polyethylene insulation materials;
therefore, it has been specified the influence types and their concentrations of cost-fewer nanofillers on
dielectric strength of polyethylene nanocomposite insulation materials.