The device passes - rod and the rod assembly passes -

摘要

The insulator having a through channel (47) for a connector rod (14) has an inner core (44) covered by an outer sleeve (46) of a different material. The outer sleeve (46) is made from a more flexible material than the inner core, and is fitted to the core with no clearance after the conductor rod has been inserted. The sleeve has at least one peripheral collar (68), giving it a local enlargement of its diameter.