cable ( introduction )

Electricity is conveyed in metal conductors , which have to be insulated and which also have to be protected against mechanical damage . When the conductor is insulated to make a usable piece of equipment for carrying electricity , it becomes a cable . This nomenclature makes a convenient and logical distinction between a bare conductor and insulated cable , but in practice the terms ' conductor ' and 'cable' are in fact used interchangeably and it is olny the context which makes clarified what is being referred to . We shall try to avoid confusion and shall discuss conductor first and the insulation appllied to them afterwards .