To be clear - the typical temperature rating you’ll find on mains power cabling in a house is 60c.
The highest you’ll typically be able to find is 75c.
70 Celsius is NUTS for that usage, not ‘oh, that’s ok then’
It's easier to spec out heat resistive materials for a 5cm cable than for the entirety of a house's mains power cabling. Sure, 70°C is a lot, but I think the point is that it would work if it had to.
It’s a sign of a lot of
resistive heat losses and requires specialized insulation and connectors at that level (same for mains). Typically insulation is starting to weaken or even melt at that point.
It’s well outside normal expected operating temperatures for wire.
Crazy high resistive heating when driven at multiple factors above the rated power isn't cause for alarm though. If you put 50A through your wall outlet you wouldn't be surprised when it got hot. The only application where pulling 1500W through a 12VHPWR connector is even close to possible is when using cryogenic cooling (when the conductive cooling will keep the power cable below ambient despite how many amps are crammed through them).
This data point isn't exhaustive, but it does indicate that the actual safety margin is not as tight as is assumed from this news cycle.
You and I have a very different concept of safe? I don’t think it’s saying what you think it’s saying.
That brand new connectors and wire that are custom specced wouldn’t catch on fire (but come close!) at only 2x the power draw means it’s very likely any damage to a connector, wire, etc. especially with normal wire and connectors likely would cause damage and a fire, at much less than that power draw.
Which is what we’ve been getting reports on.
And that is just from minor physical damage it seems,
ignoring corrosion or fraying wires over time which is usually the bigger problem.
That is not an issue with the connector though. That is the adapter. That is my entire point. The connector is safe. Shoddy adapters are the problem. Putting multiple supplies in parallel is always very shady, doubly when it's high current through a small piece of metal. That's what's dangerous, not the 12VHPWR connector.
70 Celsius is NUTS for that usage, not ‘oh, that’s ok then’