| 摘要 |
PROBLEM TO BE SOLVED: To aim at electric protection countermeasures against a thunderbolt accident or the like at a place such as a building and a general architectural structure where an electrical equipment or the like is used, and provide so that a beautiful appearance of interiors or the like is not impaired. SOLUTION: A connector classified according to uses and a connector for multi-purpose use wherein a plug-in classified according to multi-purpose use is possible are installed in a box on an outlet plug-receiving side, and an embedded type of receptacle is provided on wall surfaces, floor faces or ceiling faces or the like, and a plug-receiving part classified by purposes are classified according to a shape difference and color difference or the like. By this, a housed fixture, that is equipments and fixtures to the protected from overvoltage or the like, and to be housed in the box are made to have a fire-resistance, and a safety against a fire-hazard can be improved.
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