240伏电器通常都是大功率(个别小暖气之类除外),否则也不需要240伏。中间加开关不但无必要,反而增加故障率和失火概率,多一个开关就多一个接触电阻。
240伏电器通常都是大功率(个别小暖气之类除外),否则也不需要240伏。中间加开关不但无必要,反而增加故障率和失火概率,多一个开关就多一个接触电阻。
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