Voltage difference between the NVR cover and the building ground

# Power, # Ground, # Short circuit

# QRN-830S/430S

1. Installation Cases

   -  The NVR models were installed in office.

2. Symptoms

   - There is a voltage difference between NVR Cover and building ground

   - The neutral-to-earth voltage (NEV) is mistaken for leakage voltage

      * Neutral-to-Earth Voltage: It is an invalid power voltage caused by the potential difference between            the neutral terminal and the earth when the earth is not connected (this phenomenon is not a                    defect in the product)

3. Causes

   - The NVR ground terminal was not connected.

4. Measures

   - Follow the installation guide: Use the Ground terminal for ground connection.