an electrical insulator prevents the flow of electricity
porcelain is good_electrical_insulator. electrical_insulator is insulating_medium. insulated_wire is electrical_wire. electrical_conduction is flowing. electrical_plug is electrical_conductor. power_cord is multi_conductor_insulated_wire. electrical_outlet is electrical_conductor. pure_water is good_electrical_insulator. electrical_wire is electrical_conductor. multi_conductor_insulated_wire is insulated_wire.