Measuring of RCD in IT earthing system can be done with instruments MI 3155, MI 3154 and MI 3152 with required following settings:
- Earthing system: IT
- Ignore PE warning (IT): yes
Measuring setup for measuring of RCD in IT earthing system is shown on picture below.
![](/support/confluence/mpd/files/en/44302386/44302385/1/1643966758000/Measuring+RCD+in+IT+system.png)