| 摘要 |
PURPOSE: A wire protection duct built in a wall of an apartment house is provided to easily connect an outlet box by withdrawing an electric wire through a space between adjacent cover plates. CONSTITUTION: A combination protrusion unit(32) is separated from the end of a cut part. A cover plate inserting groove is extended from the combination protrusion unit in one direction. A first fixing rib(34) is protrusively extended from the other side of a duct body(3) with the cut part. The duct body is located on the same plane as an inner wall. A combination protrusion unit is inserted into a combination groove unit. A cover plate(4) is inserted from one end of the duct body or cover plate insertion groove.
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