On 11/06/2017 01:36 AM, David Farber wrote:
I have one of those polarity/line/ground checker plugs. It has three lamps
that illuminate according to the condition of the 120VAC outlet. The neon
light that illuminates indicating a good ground is not lighting up anymore.
Will this replacement neon light work properly for this application?

Hello, and these testers (with or without GFCI test capability) are very
simple devices consisting of three neon lamps with ballast resistors
connected line-neutral, line-ground and neutral-ground. Your main
problem I think is that these testers usually are encased in a molded
liquid-resistant rubber-like enclosure. Buying a replacement unit might
be more feasible. Also, depending on the tester manufacturer, the
pattern of of the 3 lamps (on or off) for the same outlet condition can
be different. Sincerely,


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J. B. Wood e-mail: