A device for monitoring a neutral grounding resistor (NGR), including firstand second NGRs electrically connectedin parallel, a rectifier circuit electrically connected in series with thesecond NGR and a voltage source and a logic resistorelectrically coimected in series with the second NGR. A logic circuit measurescurrent passing through the logic resistor and determines theresistance of the first NGR based on the measured current and the resistanceof the second NGR. As such, a failed-open orfailed-short condition of the first NGR may be identified based at least inpart on the determined resistance of the first NGR.
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