will this tell me if the power to an outlet is off?
1475087
If so, the lights will all be off. This is handy for making sure you have the correct breaker off if you are working on wiring.
55173
Not that I'm aware of, I just had a power outage yesterday and the unit remained off
785391
Since it cuts the power to the box you are plugging the main unit, you could probably turn it off but not on from the main unit.
2100803
I believe so, it's been awhile since I installed mine but I think it's just a variable power outlet.
958961
Not really, unless you consider that to get it to light up, there is a minimal current draw while the unit is lighted up. When you unplug, there is no current draw. It really doesn't "Test" to get an accurate reading. It just shows what the battery reading is.
1793663
Hold it to where it does not go off and move it towards a power cord or a fluorescent light. It should go off the closer to the power it gets. It does not tell you if it is measuring EMF or RF energy.
1948671
That has never happened to me, so I can't answer specifically. However, if I unplug it, it must be reset again, so I assume the same would be true of a power failure.
379038
It only tells you the voltage loss at a specfic load (15 or 20 amps). If the loss is out of line then you would need to investigate to find the cause, like bad connections or undersized wires.
452965
No this device will only show if the outlet actually has power, how it is wired (polarized), and test a GFCI outlet for tripping properly. GFCI not resetting then will not show you anything on this tester as no lights will light up. I would check first to see if there is another GFCI receptacle or even breaker that is downstream from the one that is tripped as I see this in my inspections from time to time. Basically someone installed an unnecessary GFCI . If there is, it will need to be reset in order to reset the one upstream. If not, then the GFCI outlet has probably just gone bad. If none of that made sense....call an electrician. Bottom line is no this tester will not help No this device will only show if the outlet actually has power, how it is wired (polarized), and test a GFCI outlet for tripping properly. GFCI not resetting then will not show you anything on this tester as no lights will light up. I would check first to see if there is another GFCI receptacle or even breaker that is downstream from the one that is tripped as I see this in my inspections from time to time. Basically someone installed an unnecessary GFCI . If there is, it will need to be reset in order to reset the one upstream. If not, then the GFCI outlet has probably just gone bad. If... » Read More No this device will only show if the outlet actually has power, how it is wired (polarized), and test a GFCI outlet for tripping properly. GFCI not resetting then will not show you anything on this tester as no lights will light up. I would check first to see if there is another GFCI receptacle or even breaker that is downstream from the one that is tripped as I see this in my inspections from time to time. Basically someone installed an unnecessary GFCI . If there is, it will need to be reset in order to reset the one upstream. If not, then the GFCI outlet has probably just gone bad. If none of that made sense....call an electrician. Bottom line is no this tester will not help « Show Less
2089130
Yes it does, to test, plug into a power strip and turn the power strip on and make sure the GFCI is on, hit the black test button on the GFCI and it will be off as if a power failure occured, turn the power strip back on and the GFCI clicks back to the on on or powered up position (red light lit). Hope this helps. Jeffrey Nordi
2245095
No, the GFI reset turns the red light (power) back on if it is off. The "Test" button turns it off.
1335636
typically at the fuse box it is just power and it is switched later. you could test where you are tapped to see if it is turning off when it's not in reverse
1876358
Check the power plug at the base of the unit. Sometimes the plug will back itself out and disconnect the power. It looks like it's plugged in, but the plug isn't fully seated.
861376
No, but you will need to turn that breaker off. Use a meter and double check that there is no power on that circuit. If in doubt, then pull the wires for that circuit.
1982996
It alerts me when opened or closed no matter what. Not sure if power is lost.
168594
It shows that the power is successfully connected. It goes out but never lets you know when fully charged. Sorry, I just let it go for a few hours.
1439277
Not directly. Once you have determined which breaker to turn off, you can plug in the sender (the plug-in) and see if the little pilot light is on or not in the 'downstream' outlets.