Power Wedge 1 Line conditioner

I tested the 75 watt outlets with the AH Sperry CA-300A wire circuit analyzer. All of them came up as open ground
The 4 amplifier outlets @ 1200 watts total did not. They came up as correct.

The wall outlet is correct.

Rather than speculation, is there anyone who know if this is normal, and if so why?
Thanks

 

There are all sorts of power line "conditioners". These usually fit somewhere into one of the following categories: Power-line filters, Isolation transformers (basic), "Balanced Power" isolation transformers, load-tap changing regulators, and ferro-resonant regulators, as well as power regenerators.

I'm not familiar with this particular conditioner, but assuming that it falls into the isolation transformer or balanced-power category, then the normal linkages between the neutral and safety ground will not have been maintained by definition. And in the case of isolation transformers (if that is what this is), this should not be something to worry too much about because the isolation itself should be able to provide comparable safety to that of having the safety-ground.

 

possibly by design? I understand this may not be the exact model you have ...
Audio Power Industries Power Wedge Ultra 116 power conditioner
The Power Wedge Ultra 116 has a bank of four amplifier outlets, one 150W outlet, and five 120W outlets. The 150W and 120W outlets each have three switched configurations: floating, balanced, or neutral.

In most cases, balanced mode (±60V, center grounded) will work best, but not always. Some components are designed to "anticipate" neutral ground reference. This doesn't mean that there's no ground, merely that there's no ground reference in the AC itself. When ground is "floated," the impedance of the equipment attached determines the neutral/ground reference. In this setting, the output is still balanced. The "neutral" or normal setting (120V over 0V, the typical domestic AC setting) is not balanced, as it references ground to neutral, but the component still benefits from the power conditioner. When all else fails, this choice might well squelch ground noise.