NOTICE
ELECTRICAL INSTALLATIONS HAVING EXISTING WIRING NOT COMPLYING WITH
THE COLOUR CODE SPECIFIED IN ET101:2008.
Some electrical installations may contain older wiring systems that do not comply with the colour code specified in the current National Rules. In such cases, it is necessary for safety reasons that warning notices be provided for the benefit of personnel that may not be familiar with the older systems.
In some older installations, the colour black was used for the neutral conductor, and in three-phase circuits, the colour blue was used for a phase/line conductor.
Warning notices should be provided in the relevant locations, e.g. distribution boards, with the following wording or its equivalent:
WARNING
The colours for cables and insulated conductors in this (part of the) installation do not comply with the National Rules for Electrical Installations ET 101: 2008. The core colours and their respective functions should be verified by measurement.
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