[ScottKolo]

While amperage is indeed a problem, PD 3.1 uses 48 volts to deliver 240W. https://www.usb.org/usb-charger-pd

That’s only 5 amps, but such a high-ish voltage is enough to lead to arcing. Charging cables are likely to require additional safety measures.

[delfinom]

Not even safety requirements, going above 48V will start subjecting to your device to electrical code.