IEC 60445 is an international standard published by the International Electrotechnical Commission. It establishes a uniform system for identifying conductors—such as phase, neutral, and protective earth (PE) wires—using colors or alphanumeric notations.
Many countries have adopted IEC 60445 as a national standard (e.g., EN 60445 in Europe, BS EN 60445 in the UK, DS 60445 in Denmark, SNI IEC 60445 in Indonesia). Sandardization bodies in some nations allow you to in their public reading rooms. iec 60445 pdf free
One of the most critical aspects of IEC 60445 is the color identification of conductors: IEC 60445 is an international standard published by