In some designs, the neutral and ground busbars are connected, meaning they are physically and electrically connected. In this case, the neutral and ground points of the equipment can be called "resonance points." Resonance points lie between ground potential and zero potential; if they are not connected, interference will occur.
However, in some cases, the neutral and ground busbars are not connected.
Separate Neutral Wire: If a device uses a separate neutral wire, meaning the neutral point of the device is separated from the ground potential, then the neutral and ground busbars are not connected.
Twisted Pair Cable: If the equipment uses twisted pair cable and there is no connected neutral bar inside the equipment, the neutral and ground busbars cannot be connected together.
