小电缆电阻会更高，造成过热，并最终融化。
A smaller cable would have a higher electrical resistance, causing it to overheat, and eventually, melt.
防止电力电缆冷却、火炬或枪、消耗品过热保护焊，也算伤害。
Cooling prevents the power cable, torch or gun and consumables from overheating and also protects the welding operator from injury.
由于电缆接头的过热崩烧故障，可能引起大面积停电。
Due to over-heated on the cable tie-in, the breakdown may cause a large area power off.
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