If your wiring was installed before 2018, your wiring colours are likely to be different. However, even if the colours of your wiring are out of date, this does not mean that the circuit is not working.
Single-phase wiring was introduced and assumed the following colours: red was used for active, black for neutral, and green for the earth.
Prior to 2018, three-phase wiring colours were used: red was used for phase one, white for phase two, blue for phase three, black for neutral, and green for the earth.
The main problem with updated wiring colour schemes is that old and new standards can be confusing and misleading. When planning to hire builders for a renovation project, they need to know the ins and outs of the colour standards, as the old ones may not match the new colours on the Internet.
In addition, there is the danger of careless interaction with live wires, which can be life-threatening.
However, it is important to realise that professionals are aware of the innovations in wire colours and this shouldn’t cause problems.