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2 Different power supplies: Connecting V- together

Noise

Jan 27, 2016
3
Joined
Jan 27, 2016
Messages
3
Hi everybody,

I have a rack where there are two different power supplies. I would like to avoid gnd loops, or dangerous short circuits. Is it safe to tie all '-' terminals together? If so, should I connect the earth terminals, which are already connected to the rack chassis, to the common '-'?

Thanks
 

Tha fios agaibh

Aug 11, 2014
2,252
Joined
Aug 11, 2014
Messages
2,252
It sounds fine to me. You can either tie all your "-" (negatives) to earth ground, or just tie the two together and have a floating neg rail.
As long as your grounds are tied together at the source only you won't have ground loops.
 
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