I am playing with electronics that i am designing for positive ground environment (-48vdc), its looking challenging to design the electronics the right
way to prevent ground loops, and "accidental" direct short circuits by end users/installers.
The electronics module will live inside a plastic enclosure with a "floating" ground, but it will be powered from a 12Vdc source (inside a stationary diesel generator) that has its (-)ground directly connected to the positive 48Vdc (ground) of the site, which is also connected to the earth bar on the 3ph mains DB.
Does anyone know of any pointers/standards when designing this kind of electronics?
I am also interested in finding ways to protect (isolated?) negative grounded electronics modules against lighting strikes being discharged on the positive 48vdc ground.