https://www.techspot.com/news/89828-usb-c-specification-revision-21-brings-up-240w.html#:~:text=the%20maximum%20voltage%20has%20been%20increased%20from%2020V%20

https://www.techspot.com/news/89828-usb-c-specification-revision-21-brings-up-240w.html#:~:text=the%20maximum%20voltage%20has%20been%20increased%20from%2020V%20(USB-C%202.0%20standard)%20to%2048V https://www.techspot.com/news/89828-usb-c-specification-revi.... So we are looking at 5A current, not 48A. 16 gauge will have only a 3% voltage drop for a 1.5m cable. Probably more important is that the insulation and connector materials are rated for the heat, and gold or rhodium plated for minimal contact resistance.