a conducting wire can electrocute the user & electrocution can cause death ->  a conducting wire can cause death to the user by electrocution  a conducting wire can cause death to the user by electrocution & preventing electrocution will protect the user ->  preventing electrocution from the conducting wire is required to protect the user  preventing electrocution from the conducting wire is required to protect the user & electrical insulation on a conducting wire can prevent electrocution ->  electrical insulation over a conducting wire is required to protect the user  electrical insulation requires wrapping a conductor in an insulator & a conducting wire is a conductor ->  wrapping the conducting wire in an insulator can achieve electrical insulation  wrapping the conducting wire in an insulator can achieve electrical insulation & plastic is usually an electrical insulator ->  wrapping the conducting wire in plastic can achieve electrical insulation  electrical insulation over a conducting wire is required to protect the user & wrapping the conducting wire in plastic can achieve electrical insulation -> wrapping the conducting wire with plastic can protect the user