I'm new to the forum and this would be my first question.
I'm working on a non-isolated AC/DC power supply with universal AC line input and 380VDC 3kW output. The output is for sure not isolated from the input.
This power supply is supposed to supply some lighting applications and for safety purposes all the metal equipment in the load are connected to the AC safety ground. Now I have two questions:
1) Can I connect the DC output negative leg to the AC safety ground (considering the fact that it is not isolated.) If not, why is that not possible?
2) Do I need to worry about GFCI on the DC side (for personnel safety)? I searched a lot for this issue and I couldn't find anything on this. There is ground fault protection on PV arrays but that is solely for fire hazard protection and not human protection.
I'd appreciate it if we can brain storm here about the issue to find a solution.