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functional earth

  1. eveares

    Do only electronic RCD's/RCBO's have functional earths?

    Just wondering if the only reason some RCD's/RCBO's have functional earths is to allow the electronics inside the RCD/RCBO to remain active in the event the incoming neutral is lost or impaired casing a low/absent voltage between L & N. Any other reasons for functional earths? Are RCBO's/RCD's...
    • eveares
    • Thread
    • 30ma earth electronic functional earth mechanical rcbo rccb tripping rcd
    • Replies: 63
    • Forum: Electrics UK
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