Safety adapter for ? 4 mm socket. It can be used to ensure compliance with the standard 4 mm socket.
It is fitted without the 4 mm socket and then fixed in position by tightening a grub screw (using a hexagonal socket wrench), causing the ? 4 mm plug to expand.
For use in education, research and development etc.
When installing the adapter, the component to be connected must be powered off.
IEC 61010 CAT II