目前新建楼房的供电系统中已经不再使用保险丝,而是使用一种自动控制的安全电路,当用电负荷过大或发生短路时,电路会自动切断,如果站在地上的人碰到火线而使火线与大地经人体构成通路,电路也会切断,以保人身安全。某一住户搬入新居后,他看到墙上的电源插 In the current power supply system for newly-built buildings, fuses are no longer used. Instead, an automatically controlled safety circuit is used. When the power load is too large or a short circuit occurs, the circuit will be automatically cut off. If people standing on the ground hit the line of fire, The FireWire and the Earth will form a path through the human body, and the circuit will be cut off to protect personal safety. After a household moved into his new home, he saw the power plug on the wall