Large villas can contain several electrical systems in one house
These areas contain many substantial Victorian and Edwardian homes. In practice, the original house may have changed several times.
Extensions and loft rooms can add newer circuits. Meanwhile, quiet bedrooms or cellars may retain much older wiring.
Also, bigger houses naturally need longer cable runs. Coach houses and annexes can add separate supplies again.
Therefore, MPS looks at how the whole installation fits together. A new kitchen alone does not tell the full story.