电线越细电压越低吗？ 电线的粗细和电压有关系吗?
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电线的粗细和电压没有关系。
电缆粗细一般是跟电流相关的，电缆粗细决定着电缆的电阻，越粗电阻越小，线损热量越少，线细了超过额定电流，热量太多电缆皮容易烧坏，电缆承受的电压与电缆皮材料和厚度相关。
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