15 Interlocked socket-outlets 聯锁插座
插头插座量规Gauges for plugs and sockets：
IEC60884|GB2099|VDE0620 测试设备Testing equipments：
Socket-outlets interlocked with a switch shall be constructed in such a way that a plug cannot be inserted
into or completely withdrawn from the socket-outlet while the socket-contacts are live, and the
socket-contacts of the socket-outlet cannot be made live until a plug is almost completely in engagement.
Compliance is checked by inspection and by manual test.
NOTE Other test requirements are specified in IEC 6