I am thinking of rewiring some of my workshop with a RCD spur for my machine tools and bench and an emergency stop. I use an ESD plug to ground an antistatic mat when working on electronics on the bench.
The RCD spur will have something in the earth line to sense current - is this going to have any effect on the effectiveness of the ESD ground, or should I add another ground for ESD use? Is having a second return path going to reduce the effectiveness of the RCD for the machine tools (not that I normally use both at the same time)?