我想拉电线有500米左右距离，用1000瓦的功率的电器，应该要多大的铝线才够用？ 三相电700米的距离25kw 用多大的电缆呢（铝线）？
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按功率考虑2平方足够,但在室外拉500米,考虑线强度建议用大些
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绛旓細1.5涓绫筹紝*1000绫筹紝1500鍏
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绛旓細閾滆姱鐢甸樆鐜噋锛0.0175惟.m/銕²锛孯锛0.0175*500/2.5锛3.5惟銆侷锛漊锛廟锛10.5V锛3.5锛3A锛屾嫬鎹及绠楋紝褰撴湯绔數鍘嬫崯澶10V鏃剁害璐熻嵎3A鐢垫祦锛屽崟鐩220v璁惧绾600w锛堢摝锛夛紝涓夌浉380V绾2000W銆
绛旓細绠鍗曠殑缁忛獙鍏紡璁＄畻鏄紝涓鍗冪摝涓鐧绫崇背閰嶉浂鐐瑰洓骞虫柟姣背鐨勯摑绾匡紝20*0.4=8*5=40锛20鍗冪摝鐨勭數鍔ㄦ満锛500绫鐨璺濈锛闇瑕佷笉灏忎簬鍥涘崄骞虫柟姣背鐨勯摑绾匡紝寤鸿閫夋嫨鍥芥爣浜斿崄骞虫柟鐨勯摑绾裤備簩鍗佸崈鐡︾殑鐢靛姩鏈虹數娴佹槸鍥涘崄瀹宸﹀彸锛岃绠楋細0.027/40=0.000675*40=0.027*500=13.5銆0.027/50=0.00054*40=0.0216*...
