| 摘要 |
PROBLEM TO BE SOLVED: To prevent a flow of a surge current to the frame of a unit room even when a surge voltage is applied on a box arranged on the back of the ceiling of a unit room. SOLUTION: A frame 16 is arranged at the back of the ceiling of a unit bath room 10 and an insulation tape is mounted on a lateral frame 22 and a longitudinal frame 20. A screw hole is formed in the lateral frame 22 and a bush made of synthetic resin is mounted. A control box 26 is placed on the frame 16 such that an opening coincides with the central hole of a bush and a screw 46 is screwed in through an opening. |
