[KongchangAI]
Unverified90% confidenceCautionTime unknown

无TN-S/TN-C-S可靠接地系统时,不要指望SPD起效:浪涌保护器的泄流必须通过良好接地(接地电阻建议≤10Ω,防雷≤4Ω)导入大地,老房无地线或地线虚接时装SPD形同虚设,应先解决接地

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