I have to provide a 160A 3P service to a building over a 65 meter run in highly reactive soil. We have been told to allow for a vertical movement in the soil of up to 300mm around the building perimeter. I am thinking of using 100mm diameter HD corrugated conduit. Will this do it or is there some other solution? I am concerned because to me 300 drop over only 65 meters seems a lot. I can allow for extra cable and loop inside the cabinet and this should protect the cable from being ripped out of its connectors but I am concerned that the conduit may tear or split. What can be done here?
