楼道内的总开关一般都是空气开关，空气开关的大小是根据国家用电标准来确定的，也就是说这个空气开关的大小我们是无法私自改动的，因为它与上口的电缆是匹配的;
由于家中配电箱内的开关配置只是根据家中的用电负荷来确定，没有考虑楼道空气开关的大小，最终导致家庭配电箱内的开关的大小是大于楼道内的总空气开关的，这种现象出现在很多装修公司给装修的过程中;
所以，当我们使用大功率的电器的时候，就会出现家庭配电箱内的开关没有跳闸，而是越级跳闸，跳的是楼道内的空气开关;
出现这种问题时，我们要观察一下楼道内总空气开关的大小，例如楼道内的总空气开关是40A的，那么我们家庭的用电负荷最大也不能超过8800W，我们可以根据这个用电负荷，合理安排家用电器的使用。
由于空气开关的本身质量问题或者是连接问题导致的楼道内空气开关总是跳闸的原因以及解决办法：
我们首先要做的是检查一下楼道内空气开关的接线，看看空气开关的端子是否松动，空气开关的接线是否牢固，因为电线的虚接会造成空气开关的跳闸，严重的时候还会烧坏空气开关甚至是引发火灾;
至于是否是由于空气开关内部之间问题引起的楼道内空气开关跳闸，这种问题没有好的解决办法，我们只能购买一个新的同型号的空气开关，然后找专业的电工给我们更换，最好是找电力局的维修人员来给我们更换。
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