By grounding at the supply, you would technically be creating a ground loop.
But this happens all the time when folks use positive grounded power
supplies on positive grounded loads. I don't think it would hurt or help
anything. It could make it obvious to some future technician that this is a
pos ground system. That could be a good thing.
Now, if you decided to power it with only one negative wire and trust the
building and tower grounds for the return.... things could get dicey indeed.
-----Original Message-----
From: [email protected]
Sent: Tuesday, June 21, 2016 12:14 PM
To: [email protected]
Subject: [AFMUG] -48v stupid question
My 48v power supply has floating ground on the DC side. It does have a
chassis ground, and the AC input has a ground.
So my DC side is -48 only by virtue of the equipment on the tower having +
grounded.
Should i go ahead and connect + to ground at the power supply? Seems like
that would make it official, but it's already working now.
Do i gain any safety or equipment protection by adding that ground
connection at the bottom? Would i add any danger or potential problems?
Sent from my iPhone
