Ee, anyị nwere eletriki mkpanaka mkpanaka post insulator, biko lee n’okpuru. ihe mkpuchi ọkụ eletrik nke dị mma maka post mkpanaka ígwè, e nwere ihe nkedo plastik a na-eji na-eme ka ihe mkpuchi ọkụ eletrik na-agbanye n’elu ígwè ígwè, akụkụ nke ọzọ na-ejikọta polywire ma ọ bụ polyrope.