| 摘要 |
A method of restricting operation of at least one electrical device connectable to a site electrical power supply system and an electrical device and transmitting device for operating in accordance with the method. In one embodiment, the method includes: (1) receiving a signal including a site identification code via the site electrical power supply system and extracting the site identification code by the at least one electrical device, (2) determining a correspondence between the site identification code and a site confirmation code stored in a memory of the at least one electrical device and (3) allowing unrestricted operation of the at least one electrical device only when the site identification and site confirmation codes correspond.
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