IEC 60335-2-30取暖器标准
22.109 The disconnection of the supply by a switch in the off position shall not rely on
electronic components.
IEC 60335-1中对off position的定义：
off position
stable position of a switching device in which the circuit controlled by the switch is
disconnected from its supply or, for electronic disconnection, the circuit is de-energized
NOTE The off position does not imply an all-pole disconnection.作者: 04211 时间: 2012-1-10 18:53
意思是不要装一个实质上只是控制电子线路动作的开关。它会使人误会成器具已与电源断开了（不一定需要是全极断开）。这种误会是危险的，因为人们很可能出于防尘需要而将其覆盖。作者: 诗心竹雨 时间: 2012-1-10 18:54
电暖器都要装机械断开总开关