functional earth
specific notion of electrical ground, used as part of a device's operation and not as a protective system
en-GB/ˈfʌŋkʃənəl ˈɜːθ/
en-US/ˈfʌŋkʃənəl ˈɝθ/
specific notion of electrical ground, used as part of a device's operation and not as a protective system