| 摘要 |
PROBLEM TO BE SOLVED: To carry out appropriate treatment at an early stage by being able to easily know abnormality of a receptacle in order to solve such a problem that it is difficult to request a user to maintain the initial performance since it is hard to check the defective place in a conventional receptacle and a receptacle plate in either of the cases of heat generation due to electrical or mechanical contact failure, overload, or secular deterioration, and of the heat generation or the like due to tracking phenomenon caused by dirt and dust accumulated in a receptacle portion. SOLUTION: For the conventional receptacle and the conventional receptacle plate 1a, a material having performance in which it is changed to a prescribed color due to the heat generation in the receptacle portion is used as a forming material of the receptacle, and a color change material used for a seal 1c, a label 1b, and coating is stuck to, mounted on, and coated on the surrounding of the receptacle, then appropriate treatment is carried out rapidly since the user can know the heat generation of the receptacle easily, thereby being able to prevent the occurrence of a serious fire accident or the like to affect even human life. COPYRIGHT: (C)2011,JPO&INPIT
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