For 6mm2 T&E, I'd probably use separate 20mm oval conduits, one particular for each of the two cables, but I might guess you'd need 32mm oval conduit it you actually wanted to put the two in one length. PVC-U trunking modules can be found in distinct measurements and configurations, enabling https://alexisldthi.diowebhost.com/83076684/the-best-side-of-mini-trunking