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厂家直销,导电率≥国标20%.30%.40%

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c.当保护线(PE线)所用材质与相线相同时,PE线最小截面应符合下表要求,当PE线采用单芯绝缘导线时,按机械强度要求,截面不应小于:有机械性的保护时为2.5mm2,无机械性保护时为4mm2

他说:“这是我们在拆除靠近街道的建筑时遵循的标准预防措施。”。

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