Fuses and all installations are checked and room for couple machines in there built from scratch.
There is one corsair ax1500i, one superflower or something like that 1600W PSU, this thermaltake 1500W and 3 more corsair 1200W PSU. also one 2200VA ups with couple stuf on it like server and network but not big load.
So fuses and all installations are really great and this fuse out was happening in every single location where I was plugging this PSU from day one. But back then I figured it is big one so probably normal thing to happen Only way to avoid it was when it was plugged to that big UPS first.
I will check tomorrow on those fuses anyway but if I recall correctly house was built to pull up to 50 KW without issues at all.
All in all electric guy checked all installations before building these ones for my small render room and everything on that side is 100% good and covered.