GFCI tester - open ground?
gene_2007
15 years ago
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petey_racer
15 years agogene_2007
15 years agoRelated Discussions
Open ground from sub panel - Really?
Comments (4)I know the ground-neutral jumper is supposed to be disconnected in the sub panel. Is that the reason my circuits seem to fail? Well, it is correct not to connect the neutral bar to the equipment ground bar in a subpanel so I can't in good conscience say that is the reason the equipment grounds test bad. Neutrals and equipment grounds are properly bonded in one place only--the main panel. I'd start out by inspecting the main-to-subpanel wiring. The normal case is that there are four wires running from main panel to subpanel (two hots, a neutral and a ground). The ground wire should be well-connected to the ground bar in the main panel on one end, and the subpanel's ground bar at the other end. Have you tested hot-to-ground in the subpanel? Above all, don't just jumper the ground and neutral bars in the subpanel. That would very likely make the problem appear to go away, but it isn't the correct solution....See MoreFalse ground on plug-in GFCI device?
Comments (10)I tested another plug-in 6-outlet device I had around, and it also tested with what appears to be a false ground. I agree with ronnatalie that those cheapo testers are not particularly reliable as I had one that apparently had one bulb that was burned out and was not detecting reverse polarity. Nevertheless I purchased another one that I believe is currently working okay as by testing various outlets and devices I have determined that there are no burned out bulbs. However, I do not agree that the testing methodology can be the whole problem, especially since the probe tester also shows a ground-to-neutral connection. The thing is that the 2 devices that looked as if they have a false ground are recent purchases, where as older devices appear to be okay. I agree with davidr that there is probably a manufacturing issue, and I just do not trust the 2 devices that are showing a neutral-to-ground connection, especially since every other surge strip and power tap I had around the house tested okay. (And I have quite a few of these.) I happened to have one other 6-outlet power tap that did not show a ground-to-neutral connection, so I decided to use it. If I can find the receipts I may try to return the 2 devices I think may be faulty. In the future I will test every plug-in power device as soon as I buy it and return it if it appears to have a neutral-to-ground connection....See MoreGFCI testers - hot to ground question
Comments (21)dudley, your correction is quite out of order. If the correction is directed to me, nothing I posted is different from your "correction". The part about tripping range of 3 ma to 6 ma is also wrong. 250 feet of NM-B cable will typically have a leakage to ground of 2 ma or fractionally more. Set at 3 ma , the nuisance tripping in some installations would be intolerable. And that would result in widespread tampering to defeat or disable the GFCI. Given that volunteers are few for determining the current level required to kill humans, it is generally believed that the level at which the sickliest and most vulnerable among us would be killed by electric current is ABOUT 10 ma and that even the hardiest specimens would be dead at 30 ma.3 ma is felt by most individuals and 6 ma is perceived by most as a very unpleasant shock. An additional hazard of electric shock is the possible injury that might occur from trying to reflexively escape the situation. I know one man who is partially paralyzed as a result of falling from a ladder when he received a shock while messing with something he knew nothing about-- but somehow thought that he did. I now I offer a correction. "Can't be to good for the life expectancy of the meter as it is creating a dead short." The described use of the meter is exactly how one would measure voltage. If the meter is set for the correct function, how would that damage the meter? This post was edited by bus_driver on Tue, Nov 12, 13 at 14:09...See MoreGrounded with Neutral touching ground - open otherwise
Comments (2)If you show no ground since removing the connection of neut-ground, it sounds as if you do not have a continous ground back to the panel. You would need to chase back through any junction boxes to find where the ground is lost. It may simply not be connected at the panel to start with. I don;t quite understand the touching the screws showing hot. What 2 points are you touching to get a hot showing?...See Morebrickeyee
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