Originally Posted by LongRunner
...running the numbers suggests that if 1.0mm² flex can carry 16A under optimal conditions, then 0.75mm² could even do about 13A in the same scenario...
Indeed it can. (Well, 12.5A, but close enough.)

I'm thinking a bit about perhaps even rigging up a "DIY power-board" for my PC desk; the SPB 1 is working well enough electrically, but it's a tad awkward to reach at and it's also picking up a bit of dust in the "face up" orientation. Given the right tools, it shouldn't be beyond my ability to assemble something with a group of dual switched outlets on suitable surface mounting blocks, using a bit of ordinary Australian TPS cable (this may be 1.0mm² with solid L+N and 7-strand earth, or 1.5mm² with 7 strands in all 3 cores) to join them together and with an IEC 60320 C14 inlet mounted in the side/underside of one block (so I can use whatever cord I have available to connect it to the wall outlet), and the whole thing mounted against a vertical "wall" of the desk. I even have a 10A thermal circuit breaker of the same type common in Australian power-boards (albeit this one was taken from a cheap UPS), so I ought to be able to make it pretty safe overall.

This won't be commencing too soon, but I already know pretty much what I'll need; the outlets will be Deta 6202 (normal spacing) or 6212 (wide spaced, to better accommodate oversized plug-in PSUs), the mounting blocks respectively 6065 or 6062 (both 34mm tall, which is more than sufficient to fit an IEC C14 inlet to the side of), the TPS cable is easy enough to get (and 90°C rated as standard here in Australia), and I'll cross the bridge on fasteners (and perhaps also a "backing" sheet of preferably flame-retardant plastic, or metal to be connected to earth; maybe also clamps for the visible sections of the TPS cable) when I come to it. (I would have liked to use Clipsal stuff, but it's not really an option for me until they can be convinced to change their policy of selling only to contractors - another story, though, which I won't go too deep into here.) Then the SPB 1 will also be free to go somewhere else...