Which of the following statements about ground detectors for systems that are permitted to operate ungrounded is not true?
A. Ground detectors are permitted to consist of a system of lamps (light bulbs).
B. Ground detectors are intended to indicate that one phase has become grounded.
C. Ground detectors are available as listed equipment.
D. Ground Detectors must report the occurrence to a remote location.
D. Ground Detectors must report the occurrence to a remote location.
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