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Reducing cable sizes for termination agasint volt drop

MS01
Hopefully a straight forward question:- I have a development where the submains supply is 70mm² XLPE/SWA/LSF  and this is largely down to the length of run (volt drop) opposed to the current carrying capacity. However at the source end of the cable the meter that’s been installed cannot accommodate this size of cable so installing this through an isolator first can the cable size then be reduced to fit in the meter. The small cable would still be well with the current carry capacity of the circuit and line with the protection device? What are peoples thoughts? Bad practice??



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    Yes, a smaller cable will be fine, provided that it is still adequate for the OCPD.

    Keep the smaller cable as short as is reasonable, remember that 3 M of 25mm will have a similar effect on voltage drop as another 10 M of 70mm.
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    Yes, a smaller cable will be fine, provided that it is still adequate for the OCPD.

    Keep the smaller cable as short as is reasonable, remember that 3 M of 25mm will have a similar effect on voltage drop as another 10 M of 70mm.
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