Hi,
One problem we have with our machines is that customers will plug them into circuits that don't have the ground connected to earth ground, or just be lazy/stupid and not connect it to earth ground. Either way, this causes us problems.
90% of our support is phone support, so I can't look at the wiring that the customer has. What I want to do is put a light on the machine that indicates a proper ground. I know that a GCFI works by comparing the voltage on N to the voltage on ground, and trips if they approach each other. In this case, however the ground would not be connected at all.I have seen music products that have an LED for when the ground is properly connected. How does one detect when the ground is connected to earth ground vs. to nothing?
Thanks! Tom