With mains power, high resistance connections don't blow fuses, only short circuits blow fuses.
With mains power, neither high resistance connections nor short circuits blow PSUs.
Only a mains power surge can blow a PSU or a short circuit on the secondary side of the PSU.
Of course a PSU can die from old age, more commonly known as insulation breakdown.
![Tongue :P](https://www.computerhope.com/forum/Smileys/classic/tongue.gif)