Some of the earlier Power Supplies connected to the green ground jack to
the chassis ground but we stopped doing that some time ago.
you Can simply snip the wire to earth if you like, or ad a switch as a
ground lifter.
More about the subject here
http://www.cyndustries.com/modules_powerdist-FAQ.cfm
Best Wishes!
Cynthia
http://launch.groups.yahoo.com/group/The_Cyndustries_List/