Question
Different Grounds - Energy metering
Hi.
My name is Andres Gomez and I'm working on a project which requires to monitore the AC energy of the street, specifically street lightings. Therefore, we bought STPM32 that measures one phase to probe our design and then take further actions. However, I have a doubt regarding to the differents grounds. The image below shows two types of ground
what is the ground that has F character? Floating ground? How do I connect it?
Thank in advace.