Hi. Can anyone see a problem with having 2 x 4 core 10mm swa as an 80 amp sub main supply. I know 10mm 4 core can take 62 amps. If run together in parallel from the same 80 amp mccb breaker to the same sub main switch in the the same sub db board with a 10mm c.p.c. can anyone see a problem with that? Its an existing installation. At the moment there is no 10mm earth so I intend to add that as the earth fault loop reading is a little high. Advise please.