Open in this context means that the power is not connected and hot means it is.
When a 3 prong electrical outlet tester indicates an open ground, it is telling you that the d shaped slot on the outlet is: not connected to the ground conductor ( the bare or green jacketed wire that is supposed to provide an electrical connection to the earth) or that if it is connected to the designated ground wire the wire itself is not connected to the earth or perhaps there is no ground conductor available in the electrical device box where the outlet is located. Many areas of the country did not require that a ground conductor had to accompany the hot and neutral conductors in electrical devise boxes until somewhere around 1960 or so and some areas didn't adopt that requirement until several years after that. If there is no ground wire in your devise box you are out of luck and you should install an old style 2 prong outlet to prevent use of appliances that require a ground or you should run modern wiring to the location. If you are asking this question it means that you don't have a basic understanding of electrical wiring. It would be prudent to consult someone who has that knowledge to assess and guide you before you attempt to correct the situation.
It safely grounds or faults the GFCI outlet. You're supposed to check/test them once a month, they do wear-out and need replacing.
An EEG test.
Either the supply or the multimeter is faulty.
It could be a loose termination on the back of the outlet or the plug that you have plugged into the outlet. Check the plug end first as this is the easiest. Make sure that connection points are tight. To check the outlet turn the supply breaker OFF at the distribution panel and remove the outlet from the wall. Check the connections for tightness. If any component looks burnt or has been over heated, replace the device.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
There is a tool that plugs into a outlet that will test for that. There is one that will check for open ground in light fixtures and fans as well. That one is a little pricey... Check with your local electrical supply store.
Stick your toungue in and if it hurts you have electricity. Go to your local Radio Shack and pick up a simple voltmeter to test your electrical outlets.
When a 3 prong electrical outlet tester indicates an open ground, it is telling you that the d shaped slot on the outlet is: not connected to the ground conductor ( the bare or green jacketed wire that is supposed to provide an electrical connection to the earth) or that if it is connected to the designated ground wire the wire itself is not connected to the earth or perhaps there is no ground conductor available in the electrical device box where the outlet is located. Many areas of the country did not require that a ground conductor had to accompany the hot and neutral conductors in electrical devise boxes until somewhere around 1960 or so and some areas didn't adopt that requirement until several years after that. If there is no ground wire in your devise box you are out of luck and you should install an old style 2 prong outlet to prevent use of appliances that require a ground or you should run modern wiring to the location. If you are asking this question it means that you don't have a basic understanding of electrical wiring. It would be prudent to consult someone who has that knowledge to assess and guide you before you attempt to correct the situation.
yeah
It safely grounds or faults the GFCI outlet. You're supposed to check/test them once a month, they do wear-out and need replacing.
test in lamp
Electrical equipment should be tested every 6 months like your smoke detectors and your furnace . Electrical fires are the 3rd leading cause of fires in Canada, so test ,test test.
You will need a special screwdriver to open it up and test to see what is broken. Test to see if anything doesn't have an electrical current. This is safe as long as you arn't standing in a puddle or licking the motherboard
If the term "access point" means the base station in a WiFi network or wireless LAN, it depends on its design as to whether it needs to receive any power from an adjacent electrical service outlet or not.If it requires power from an electrical service socket outlet then power must be supplied to it either:by using a long enough "plug-in power extension cable with socket outlet" orby installing a hard-wired permanent outlet into the wall of the room that may be connected either to a suitable existing branch circuit or, as a new branch circuit from the main breaker panel in the building, by installing a separate circuit breaker and cable having the correct ampacity.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
check fuse
Do you mean water current? Do you mean electrical current? I'm not sure really what you're asking. You need to be specific. Either way, don't stick an electrical wire into water to check the current as you may die. It's not a healthy test.
An EEG test.