For 6mm2 T&E, I might very likely use different 20mm oval conduits, one particular for each of the two cables, but I would guess you'd need to have 32mm oval conduit it you actually needed to place each in a single duration. *Costs are pre-tax. They exclude shipping charges and https://zaneetivj.bcbloggers.com/28633438/how-much-you-need-to-expect-you-ll-pay-for-a-good-mini-trunking-accessories