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Apr 5, 2021 at 0:35 vote accept TucsonTerry
Apr 5, 2021 at 0:34 comment added TucsonTerry Thanks. I wasn't sure whether to trust the simple 3-light tester. Posters elsewhere indicated GFCI's "always" show as ungrounded with these testers, but it was unclear whether they assumed two wire/ungrounded wiring.
Apr 5, 2021 at 0:24 comment added NoSparksPlease Any ungrounded 3 wire receptacle must be labelled. Something is missing if the tester shows no ground. If it is a cable in the panel that has a ground but isn't connected it needs to be corrected. A cable connected in the panel but the ground not being complete to the receptacle the circuit needs to be repaired, a GFCI is not an acceptable alternative to repairing damage or fixing an incomplete or poorly installed splice.
Apr 5, 2021 at 0:00 comment added TucsonTerry So, if I find the bare copper wire coming in is NOT GROUNDED at the service box, I'll disconnect that wire from the receptacle and mark the outlet "No Equipment Ground." But what if I find that it is GROUNDED at the service box? Leave the wiring as is and no sticker required?
Apr 4, 2021 at 23:49 history answered NoSparksPlease CC BY-SA 4.0