Arduino nano 5v pin max current from wall adapter usb

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I've read many subjects related this question.
But those are confusing, because it depends how do you connect power to Arduino.
Also, answers are not consistent, as like here they say the max is 1A: [Arduino nano] How mouch current from 5V when powered trough USB?

What if I use wall adapter 5v 1a and connect it directly to Arduino Nano to USB type-c port, how much current will support that 5v pin then?

For instance, can I power 1A lamp from 5v pin + ground pin?
As I understand 5v pin is directly connected to usb 'V plus' wire, so current is limited by wall adapter itself?

if no, what is preferable way to do this if I still want to use USB port?

thank you

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From this Nano schematic

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image1870×1044 139 KB

  1. The power comes in from the USB connector and goes through a 500mA fuse. So presumably the design is not intended to support > 500mA.
  2. Then it goes through a diode, which will reduce the USB voltage by the forward voltage drop of the diode.
  3. Then it goes to the 5V pin

Edit: Added for step 2, I guess the voltage drop could be about 0.35V, so if your wall adaptor is providing 5V the 5V pin will be 4.65V. The datasheet has a graph in fig 3

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