Device for the automation of the labelling of electrical cable terminals, which is fed by one or more continuous strips of labels, comprising: - at least a strip of labels comprising: a plate, wherein the plate comprises at least one outer upper flat wall; a tube; an intermediate connection element; said plate being joined on the top of said tube by means of said intermediate connection element, and where said intermediate connection element between said plate and said tube is only located in the central part and has an extension that is limited to less than half the extension of the plate; - a feeder or advancement unit for the advancement of one end of the free section of at least one strip of labels for just the predefined length or the length equal to that occupied for the entire length of the writing that must be affixed to the outer visible side of the single plate; and where said feeder or advancement unit connects to the side edges of said plate, compressing them before the advancement of the strip of labels; - a centring device, equipped with an inserter that brings the axis of its inserter to the corresponding vertical position of the axis of the tube, and where said tube has a variable vertical position of the axis corresponding to the variable dimensions of the strip of labels, that is inserted like a pin in and from the end of the free section of the strip of labels with an insertion into the cavity of the tube itself to a length less than the size of the label that will be made after the cutting of said strip of labels and holds it in position before being cut to size; - a cutting unit that cuts the free end of said strip of labels to form the single label with a predefined or necessary length, exposed beyond the feed or advancement unit; - where said flat wall, before or after the cutting phase, exposed for printing to identify the terminal of the electrical conductor on which said label consisting of the piece of the strip of labels is to be inserted, and - a laser printer, capable of writing on said outer upper flat wall exposed to the laser beam of said laser printer, - where said label consisting of the piece of the strip of labels consisting of a material that can be written on by said laser printer, and where the writing of the printing device of the laser beam, is a different colour to and/or contrasting with the colour of the material of which the label is made. - at least a strip of labels comprising: a plate, wherein the plate comprises at least one outer upper flat wall; a tube; an intermediate connection element; said plate being joined on the top of said tube by means of said intermediate connection element, and where said intermediate connection element between said plate and said tube is only located in the central part and has an extension that is limited to less than half the extension of the plate; a plate, wherein the plate comprises at least one outer upper flat wall; a tube; an intermediate connection element; said plate being joined on the top of said tube by means of said intermediate connection element, and where said intermediate connection element between said plate and said tube is only located in the central part and has an extension that is limited to less than half the extension of the plate; - a feeder or advancement unit for the advancement of one end of the free section of at least one strip of labels for just the predefined length or the length equal to that occupied for the entire length of the writing that must be affixed to the outer visible side of the single plate; and where said feeder or advancement unit connects to the side edges of said plate, compressing them before the advancement of the strip of labels; - a centring device, equipped with an inserter that brings the axis of its inserter to the corresponding vertical position of the axis of the tube, and where said tube has a variable vertical position of the axis corresponding to the variable dimensions of the strip of labels, that is inserted like a pin in and from the end of the free section of the strip of labels with an insertion into the cavity of the tube itself to a length less than the size of the label that will be made after the cutting of said strip of labels and holds it in position before being cut to size; - a cutting unit that cuts the free end of said strip of labels to form the single label with a predefined or necessary length, exposed beyond the feed or advancement unit; - where said flat wall, before or after the cutting phase, exposed for printing to identify the terminal of the electrical conductor on which said label consisting of the piece of the strip of labels is to be inserted, and - a laser printer, capable of writing on said outer upper flat wall exposed to the laser beam of said laser printer, - where said label consisting of the piece of the strip of labels consisting of a material that can be written on by said laser printer, and where the writing of the printing device of the laser beam, is a different colour to and/or contrasting with the colour of the material of which the label is made.