> What power supply do you have that even has a 20A inlet?
ATX PSUs usually have IEC 60320 C14 inlets. The IEC 60320 standard itself states that this inlet is only good for up to 10 Amps.
UL is happy to ignore them and say that 15 Amps is okay. It wouldn't surprise me if someone else were happy to ignore that and say that 20 Amps is okay.
Even still, swapping a C14 inlet for a C20 inlet (IEC max 16 Amps, UL max 20 Amps) would be a relatively easy thing to do (EDIT: on a PSU that is already designed to take more than 15 Amps, obviously). Probably a warranty-voiding action though.
ATX PSUs usually have IEC 60320 C14 inlets. The IEC 60320 standard itself states that this inlet is only good for up to 10 Amps.
UL is happy to ignore them and say that 15 Amps is okay. It wouldn't surprise me if someone else were happy to ignore that and say that 20 Amps is okay.
Even still, swapping a C14 inlet for a C20 inlet (IEC max 16 Amps, UL max 20 Amps) would be a relatively easy thing to do (EDIT: on a PSU that is already designed to take more than 15 Amps, obviously). Probably a warranty-voiding action though.