CookiePush

CookiePush t1_j6osrgb wrote

Grounding is a critical element required for proper surge protection. In regard to the question about whether surge protectors work on ungrounded outlets, the answer is “no.” Surge protection equipment typically uses components called metal oxide varistors (MOVs) to divert excess current into the ground line. An ungrounded outlet does not have this third ground wire, therefore there is no place for the surge protector to divert excess current.

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