. "insulating phase" . "did not conduct" . . . . . "Insulative" . "long-creepage" . "non-conductive" . "insulating material" . "insulation" . . . "electrical insulator" . "insulators" . . "insulated conductors" . "sheathing" . "electric insulator" . "insulated" . "electrical" . "electrical insulation" . "electricity insulation" . "insulator" . . "Insulators" . "Insulator (electricity)" . "Insulation" . . "electric insulation" . "Insulator (electricity) #Telegraph and power transmission insulators" . "insulating" . . . "glass insulators" . "Insulator (electricity)#Sheath insulator" . "insulators." . "electrically insulating" . "insulative" . "Insulator (electricity)#Material" . . "insulate" . . "insulator to electricity" . . "electrical insulators" . "non-conducting material" . . . "Insulator (electricity)" . "band insulator" . "insulation resistance" . "electrical insulating" . "ceramic insulators" . "Insulator" . "Electrical insulators" .