| 摘要 |
A relay part is housed in a case, a fuse mounting part is provided above the relay part in the case and a fuse is attached/detached to/from the fuse mounting part from above the case. In the case, provided are an internal cover and a bus bar supporting resin body, which cover the periphery of the relay part. A drainage channel is provided in outer surfaces of the internal cover and the bus bar supporting resin body. In addition, a drainage hole which drains water flowing through the drainage channel to the outside of the case is provided in the case. The drainage channel includes an upper groove which is formed in an upper surface of the bus bar supporting resin body and has an inclined surface on its bottom and a side groove which is communicated with a lowest portion of the inclined surface of the upper groove and is formed on a side of the internal cover.
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