Does anybody have these devices on their system? Pothead cable termination and means of disconnect. 4,000V - three phase. 3 conductor PILC cable terminates in a compund filled cast iron body. Hand operated porcelain covered plugs connect to overhead wires thru rubber covered tap wires. G&W Specialty Electric made them up until about 50 years ago. We stopped operating them while energized about 5 years ago.