Can anyone explain this?

[Crossy]

6 hours ago, Negita43 said:

Crossy says  it should be based on the plug wiring. 

 

Assuming you are looking at using for Thai plugs. For UK plugs it is right now.

 

But yes, just swapping the red and blue wires should sort it. I'd extend and re-route the red wire too, passing it across the earth bus is a recipe for a bang!

 

No need to swap the wires on the USB board.