Harmonisation Labels as Prescribed in BS7671 Requirements for Electrical Installations
Two colour harmonisation labels or harmonisation labels as they are sometimes called are manufactured from a tough material with a permanent adhesive; these harmonisation labels are supplied on rolls. Two colour harmonisation wiring labels Alterations or additions to a single-phase installation do not require marking at the interface between old and new cabling providing that they are correctly coloured. However a two colour harmonisation label warning notice must be fixed at the distribution board or consumer unit, such as this sign, as per IEE regulations.
