Hi Etienne,
It is not recommended to use the Fathom Spool or Binder 770 connectors with a high voltage topside power solutions. The Binder 770 connectors themselves are rated for 175 V, and though the slip ring itself is rated for 240 V by our supplier, we have not designed the Fathom Spool/slip ring assembly as a whole to take anywhere near this voltage. We strongly dissuade anyone from using either of these components/products with high voltage, they have not been designed for this and have not undergone any necessary high voltage testing. The slip ring is also rated at 1.5 A per circuit by our supplier, but we have not yet verified this ourselves.
-Adam