Hello. I've uploaded similar question before but I think it is time to make this clear. I've seen the attached one during reading of grounding. In the picture, the body of the power line filter (or ground of the filter) is connected to inner surface of Faraday cage and signal ground is connected to external surface of the cage. Thus if common mode noise is effectively rejected by the filter, I guess the noise must be flowing on the inner surface of the cage then...there maybe radiation of noise from this flow to inner volume of the cage. I guess this is not good connection but could you tell me this is really reasonable connection? If not, could you please give me other way of ground connection?