| 摘要 |
A duplex branch circuit for selective power supply blocking is provided to make the connection of an electric heater free, thereby arranging the electric heater suitably to taste. A duplex power line(13) is duplexed parallley with a P power line(12). A main switch(20) is equipped with the duplex power line to connect and block power supply. A selection switch(31',32',33',34',35',36') is equipped with each outlet(30) to connect selectively one of the P power line and the duplex power line. A user connects an electric heater to each outlet and connects the electric heater to the P power line or the duplex power line through the selection switch. |
