I am having lights fitted above a hydrotherapy pool. The leccy is siting the transformers next to the lights in the ceiling which is 2.4m. I understood that zone 1 is limited by a horizontal plane 2.5m above the height of the pool surface. I had asked for the transformers to be placed in another room but apparently the voltage drop would mean having to run 10mm wire!!
Can anyone confirm what the regulation is and what my options are?