As i wrote in earlier post, I have a PCB which its 0V (its GND) is the Neutral wire, and the PCB is floating, meaning its ground (the Neutral wire) is not connected to earth wire on PCB (actually they are only connected through MOV, but it's still considered floating, right?).
I have a scope which is connected to Earth, and I wanted to connect a prob from the scope to the PCB.
I connected the GND pin of the Probe to the 0V (Neutral wire) of the PCB, and the (+) pin of the Probe to some resistor.
When i turned on the PCB, the power has failed.
So i disconnected the Earth wire of the scope, and then the power didnt fail.
Why did it happen?
Thank you very much.
I have a scope which is connected to Earth, and I wanted to connect a prob from the scope to the PCB.
I connected the GND pin of the Probe to the 0V (Neutral wire) of the PCB, and the (+) pin of the Probe to some resistor.
When i turned on the PCB, the power has failed.
So i disconnected the Earth wire of the scope, and then the power didnt fail.
Why did it happen?
Thank you very much.