Never seen this cable before but did an EICR on an apartment today and did a double take when the neutral supply into the CU consisted of 7 1mm singles . Furthermore the Earth was 4 2.5 mm singles. The line conductor was 10mm single. Obvious first reaction was that Sparky had run out of 10 mil for N and E and use the conductors in parallel to make up the CSA of the neutral and earth. What a bodge..... But no - upon further inspection at the services cupboard all seven apartments have been supplied with an SWA thst appears to have this configuration as per my title. Has anyone else seen this or offer an explanation as to why this has been used?