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 portant; word-wrap: break-word !important;">  選線portant; word-wrap: break-word !important;">,portant; word-wrap: break-word !important;">是有口訣的portant; word-wrap: break-word !important;">,portant; word-wrap: break-word !important;">十下portant; word-wrap: break-word !important;">5,portant; word-wrap: break-word !important;">百上portant; word-wrap: break-word !important;">3,portant; word-wrap: break-word !important;">意思是portant; word-wrap: break-word !important;">10portant; word-wrap: break-word !important;">平方以下的銅線每平方portant; word-wrap: break-word !important;">5portant; word-wrap: break-word !important;">個電流portant; word-wrap: break-word !important;">,100portant; word-wrap: break-word !important;">平方以上的銅線每平方portant; word-wrap: break-word !important;">3portant; word-wrap: break-word !important;">個電流portant; word-wrap: break-word !important;">,portant; word-wrap: break-word !important;">鋁線算一半

portant; word-wrap: break-word !important; font-size: 14px;">portant; word-wrap: break-word !important; color: rgb(58, 58, 58); font-family: Arial; font-size: 21px;">portant; word-wrap: break-word !important;">我國的家用電壓一般是portant; word-wrap: break-word !important;">220V
1.5portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">平方毫米的線電流＝portant; word-wrap: break-word !important;">10Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">（安）； 承載功率＝電流portant; word-wrap: break-word !important;">10Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＊portant; word-wrap: break-word !important;">220Vportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＝portant; word-wrap: break-word !important;">2200portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">瓦
2.5portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">平方毫米的線電流＝portant; word-wrap: break-word !important;">16Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">（安）最小值；承載功率＝電流portant; word-wrap: break-word !important;">16Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＊portant; word-wrap: break-word !important;">220Vportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＝portant; word-wrap: break-word !important;">3520portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">瓦
4 portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">平方毫米的線電流＝portant; word-wrap: break-word !important;">25Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">（安）； 承載功率＝電流portant; word-wrap: break-word !important;">25Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＊portant; word-wrap: break-word !important;">220Vportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＝portant; word-wrap: break-word !important;">5500portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">瓦
6 portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">平方毫米的線電流＝portant; word-wrap: break-word !important;">32Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">（安）； 承載功率＝電流portant; word-wrap: break-word !important;">32Aportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＊portant; word-wrap: break-word !important;">220Vportant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">＝portant; word-wrap: break-word !important;">7064                                

1portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">．口訣 鋁芯絕緣線載流量與截面的倍數(shù)關(guān)系
10portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">下五 portant; word-wrap: break-word !important;">100portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">上二，
25portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">、portant; word-wrap: break-word !important;">35portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">，四、三界，
70portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">、portant; word-wrap: break-word !important;">95portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">，兩倍半，
portant; word-wrap: break-word !important;">穿管、溫度，八、九折。
裸線加一半，
銅線升級算。
2portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">．說明 口訣對各種截面的載流量（安）不是直接指出的，而是用截面乘上一定的倍數(shù)來表示。為此將我國常用導線標稱截面（平方毫米）排列如下：
1portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">、portant; word-wrap: break-word !important;">1.5portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">、portant; word-wrap: break-word !important;">2.5portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">、portant; word-wrap: break-word !important;">4portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">、portant; word-wrap: break-word !important;">6portant; word-wrap: break-word !important; font-family: 宋體; font-size: 12px;">、portant; word-wrap: break-word !important;">10portant; word-wrap: break-word !important