x keep the area of any electrical installation as small as possible x maximise the distance to lines with high currents
x separate power lines from data lines
x use TN-S-type networks only.
Only TN-S networks are EMC-friendly. In TN-C networks unbalanced currents may arise, so that the TN-C network generates the magnetic field of a single line carrying the unbalanced current. For the same installation geometry the unbalanced current generates a magnetic field of at least two orders of magnitude higher than of a TN-S network.