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I think the 4 transformers are there because they wanted to provide individual isolation from the other components plugged into the T4.
I have a Clear Image Audio T4 Power Line Isolator and with the advent of some new equipment and PC cables I was wondering if everything was in phase equipment-wise. So I got the bright idea to use an Outlet Tester on the treated end (output) of the T4 to see which way the phase switch needed to be switched to be in phase. (there is no marking as to which way to press the rocker switch). Well to my surprise when I used the Outlet Tester it registered that all 4 of the receptacles have an "open" ground! I must admit I am confused? If they are all open ground then how does the 3 pin plug work ground-wise?Can I suggest that there might be someone to see if what I have explained it correct with all Power Conditioners or is it just mine that might not be working correctly.It would sure be a BIG help and relief to me to find out the truth! Do I have nothing to worry about OR do I have something to worry about???My equipment is plugged into the unit and works fine however when I change the rocker switch I hear no sound difference.Please can someone help out with this issue I am experiencing? I have posted a couple of pictures to fully understand what I am speaking about.
OK, in a portable, corded 'point of use' isolation transformer, there is no DC continuity from the Safety Ground to the Hot or Neutral. So the little 3 LED has no ground reference. Situation normal.
There is a good possibility the unit has each out put of the isolation transformers floating above ground. If this is the case there will not be a reference to ground from either output Line, leg, of the iso transformers. That would explain the "open ground". Will post later in greater detail
From a Bill Whitlock seminar paper.
But I presume a multimeter would show continuity between the ground pin of the isolation unit receptacle and the ground pin of the wall receptacle?Yes.* * * * * * * * * * * *To repeat myself:Portable, corded isolation transformers have different NEC & UL rules than permanent hard wired isolation transformers.If the secondaries are wired correctly so the output is a "Grounded AC Power System" the plug-in tester should have indicated 'Correct'.Only for a permanent hard-wired transformer is this true. Not so for a portable unit.
Only for a permanent hard-wired transformer is this true. Not so for a portable unit.