Samsonite801
Solar Wizard
- Joined
- Oct 15, 2020
- Messages
- 2,994
Redundant safety. Another path to insure a fuse blows or an internal fault can dissipate.
The weird thing (to me) is most of the commodity units case/chassis ground have a stud size that looks like a 10ga wire was intended. In my head I’d want it much much bigger for DC. Size of the studs suggest they intended them for an AC application?!
Chassis grounding can also help with electrical noise issues that can affect sensitive circuits. Just makes sure all of the cases/chassis of devices are at same potential (zero)...
If you look at faraday cages / boxes, they ground those boxes, which helps so anything operating inside of it is kind of in its own world so to speak, and better shielded from things (noise) going on in the outside world (also helps to keep the noise it produces inside, not to affect things outside of it).
Even though the 2 grounds are the same potential-wise, generally they keep 2 paths, one for actual device current flow, and the other ground is for safety path and shielding effect.