Thanks znort101, in effect, 10v is a value that can create some annoying problems, in particular touching the terminals with wet (or sweaty) hands. I think it's quite common to get a little electrical shock handling the patch cables. But it's very different than main dangerous leakage current.
My physicians says that this range not create particular problems, but is better to avoid this risk taking care in handling patch cables. It is more dangerous the exposition to magnetic field or stay too close to wireless equipment.