Hi, I am fitting a new kitchen and changing the layout. I am replacing the existing built in double oven some 3 metres further away from the meter and therefore need to extend the cable. I intended to use a cooker circuit jb and run behind units and under worktop to new cooker. However when I have removed old cooker the cable isn't long enough to go under worktop! Could I safely run horizontally in conduit under the plaster a couple of inches off the ceiling and down behind the new cooker??