Cabling zones exist to reduce the risk that you could accidentally cut or screw into an electrical cable when doing day to day jobs such as DIY or hanging pictures. Before starting any installation, always turn off the power supply at the main circuit breaker and verify that the wires are de - energized using a voltage. The design, con- struction, and use of power cable should only be undertaken by competent professionals in light of current- ly accepted design and engineering practices. First, always use the appropriate type of cable for your specific needs, whether it's for power, lighting, or data. Whether in industrial, commercial, or residential environments, following correct procedures minimises the risk of malfunction, fire, or damage to property and equipment. Whether you're dealing with low-voltage (LV) or high-voltage. When installing cables in walls and those cables will be concealed, BS7671 requires that they are installed only in specific zones. These were called 'safe zones' in the 17th and earlier editions, now renamed 'prescribed zones' in the 18th edition.
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