初三物理家庭电路连接顺序 初中物理家庭电路怎么连接家庭电路（就是一开始先接
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电能的使用给我们千家万户生产和生活带来的方便是不言而喻的，而有各种原因引起的火灾和触电事故也越来越多，如何做到用电安全是我们必须重视的问题。1.家庭电路的安装顺序进户线→电能表→总开关→保险盒→电灯→插座
红线叫火线，另一根黑色的线在户外就已经与大地相连叫零线，火线与零线之间的电压为220V火线与地线之间的电压也是220V.
3.接法：①保险盒有保险丝，串联在电路中插入保险盒
②开关接在火线上再与电灯串联
③电灯、插座等用电器并联
④三孔插座接线口决“左零右火中间地。
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