[GreenKeys] Model 19 table grounding question...

[E.]

Hi!

Looking at the schematics on a Model 19 and table… why do the schematics show that both AC and DC grounds are strapped together on the 19?… because when I look at the schematics  on the 19 table, it looks like on the table-side (on the same lines AC/DC that go to the teletype), they go to ground as well (I could be wrong).  Wouldn’t this create a grounding loop???  Just trying to work this out in my head with a newly acquired 19 table ;p .

Thanks much in advance ^^ !!!