While local rules may apply, generally speaking the safety of a contained cable more depends on what is protecting it one end (fuse / circuit breaker) and what the load is the other end. The question is a little too vague to answer really.
What do you mean be 'ECC'? Initially I though that was "earth continuity conductor" (our UK equivalent is CPC for circuit protective conductor) but then you say it is at 240V which is not making sense.
Also what do you mean by "chunking" ? Was it some strange auto-correct of trunking ?
Earth Continuity Cable - I've come across this term in other countries before for just about any cable that contains a CPC, sheathed or unsheathed. I did a charity job in Zambia once and explaining what I wanted was impossible until I learned this term!
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc