Sharpend so thats an option then, so is that still under regulation and can buy it like that?
I know twin and earh is no good as CPC size is always so much smaller.
The CPC of every cable is sized for that cables' max ampage rating and fault current caused by directly shorting to the cpc under fault conditions. Provided the cable is suitably protected by the correct OCPD, then there is no issue.