Source : Webster's Revised Unabridged Dictionary (1913)

Conduit system \Con"duit sys"tem\ (Elec.)
   A system of electric traction, esp. for light railways, in
   which the actuating current passes along a wire or rail laid
   in an underground conduit, from which the current is ``picked
   up'' by a plow or other device fixed to the car or electric
   locomotive. Hence