| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize and to easily perform an operation for electrically connecting a lightning arrester to three conductive bars by a constitution, wherein the lightning arrester is arranged and installed transversely at a branch switch so as to be connected to respective branch connection parts at the three conductive bars. SOLUTION: In a distribution board, a master switch, three conductive bars which comprise a plurality of branch connection parts 7, 8, a plurality of branch switches 9 which are connected to the branch connection parts 7, 8 at the two conductive bars and a lighting arrester 10 by which leads connected to the branch switches 9 are protected from a lighting surge are housed inside a box body and a lid body. Then, the lighting arrester 10 is arranged and installed transversely at the branch switches 9 and is provide with three power-supply-side terminals connected to branch connection parts 7, 8a, 8 at the three conductive bars and with a load-side grounding conductor. As a result, the lightning arrester can be arranged and installed in a space in which the branch switches are arranged and installed, and the distribution board can be miniaturized. |
