| 摘要 |
PROBLEM TO BE SOLVED: To mount all connecting sections internally in bus ducts, and to economize the distribution space of a facility by butt-connecting the conductor of one bus duct and a conductor for connection and butt-connecting another conductor for connection even to the conductor of the other bus duct while mutually joining each conductor for connection. SOLUTION: When an insulating bus duct 30 and a fire-resisting bus duct 40 are connected, width is conformed to that of the larger conductor size of the bus duct the width of the conductor of the insulating bus duct 30, and height to that of the larger conductor size, the height of the conductor of the fire- resisting bus duct 40, in conductor size for connection. The conductor 35 of the same conductor A for connection as the conductor material of the insulating bus duct 30 and the in-phase conductors of the conductor of the insulating bus duct 30 are welded mutually. The conductor of the insulating bus duct 30 the conductor 35 and the conductor 45 of a conductor B for connection welded to the conductor of the fire-resisting bus duct are joined. The conductor 35 and the in-phase conductors of the conductor 45 are superposed mutually at that time, and insulating separators 4 are pinched for preventing the short circuit of different-phase conductors.
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