Well, things like bus-stops and traffic lights may have an un-metered connection, and be billed on calculated consumption. This is likely to be fused at 10A or less in the cut-out, and the incoming supply cable may well be less than 10mm2

The more common case for lights around a building is an outside light that us one of many final circuits within the building, perhaps on its own CU but in practice still part of a larger installation, with a main fuse and supply cable sized to match the 100A supply or whatever so 25 or 35mm2 incomer - with potential for proportionally higher diverted neutral currents.

Mike

Correct

I am doing buildings so this is exactly the case

The lighting columns are final circuits and to me really the metal columns is no different than a cooker's metal cover.

Looks to me more like an exposed conductive part.

So am i right to understand that this regulation does not really apply in this case?

Correct

I am doing buildings so this is exactly the case

The lighting columns are final circuits and to me really the metal columns is no different than a cooker's metal cover.

Looks to me more like an exposed conductive part.

So am i right to understand that this regulation does not really apply in this case?