发布时间:2025-01-22 19:15:40
总配电箱的零线和地线是连在一起的,要从总配电箱接电源到下个配电箱,零线和地线就必须分开接,此时零线就不能再接地了,这就是常说的三相五线制(TN-C-S系统)。注意零线应在总箱处先接地,在同一点引同截面导线至总漏电开关进线端,从总漏电开关出来后的零线就再也不能接地了,此时相线引到哪,零线、地线也引到哪。
能率燃气热水器使用多久必须要维修 能率燃气热水器使用寿命及维修周期
2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40家里房子要装修了想知道除了通风可以除气味还有什么办法能尽快出去屋子的难闻气味呢
2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40 2025-01-22 19:15:40