Away from my PC again but you can see my setup at 1:09 in this video https://m.youtube.com/watch?v=AWvzFnInIRw

I have circuit breakers on the mains side for the stepper PSU and the logic PSU. I can’t remember the values but the stepper PSU needed a slow reaction type (D?) as I have a toroid supply.

Then on the DC side I have a fuse(can’t remember the amps) for the logic and for the steppers I have a 5A fuse on Y driver, 5A fuse on the Z driver and a 10A fuse to both X drivers. I think these are a bit high but have not changed them.

If doing again I would go with a single fuse for all steppers and try something around 5 or 6A. I think the amps are per phase and so you don’t get the full amp draw stated (is my understanding). You can get resetting fuses so experiment with lower values and if they pop during use you can reset to get going then get some higher ones or maybe add an ammeter?

I’m not an electrician either so take that for what it’s worth too!