| 摘要 |
A switch board (2) with a casing (5) thereof supported on right and left vertical supports (3, 4) includes a conduction chamber (6) and an upper and lower electricity chambers (7A, 7B) with a partition wall (8) therebetween. A drawer-type electric device (21) is adapted to operate into and out of the electricity chambers, so that a secondary movable plug (23) of the drawer-type electric device is connected and disconnected to a secondary control stationary plug (24) in each of the electricity chambers. Control lines (46, 47) are connected between the secondary control stationary plug and the control terminal in the upper electricity chamber. Wiring ducts for containing the control lines include control ducts (29) arranged along the ceiling of the casing from the control terminal, vertical ducts (38, 39) communicating with the right and left sides of the control duct, and horizontal ducts (43, 44) for connecting the end of the vertical ducts to the secondary control stationary plug of the upper electricity chamber and the other end thereof to the secondary control stationary plug of the lower electricity chamber. |
