Put the meter on AC Volts, 200V range. For residential US service you should have 120V between hot and neutral, 120V between hot and ground, and 0V between neutral and ground. Remember: narrow prong is hot, wide prong is neutral, round prong is ground. Don't set your meter to current or you will zap it. Reisitance shouldn't damage it, but the reading will be worthless. (If you don't know what you are testing for or how to use your tool, should you really be sticking things in a wall outlet?)
A multimeter is a devise used to measure voltage, resistance and current in electronics & electrical equipment.
It is also used to test continuity between to 2 points to verify if there is any breaks in circuit or line.
Your question is very vague. By test I'm assuming you want to know if it works. The easiest way is to simply plug something into it and see if it works.
Turn off the supply to that outlet and check if any other outlet is also without power. this can be done by many methods.
The answer will depend on where you are in the world!
For more information see the answers to the Related questions shown below.
Use a volt meter.
Your bathroom outlets might be connected to a GFCI Outlet. The Ground Fault Circuit Intercept outlet prevents you from electrocuting yourself in the odd chance that you drop an electrical appliance into the water of the bath tub while you're in it. Look around and see if there's one outlet with 2 buttons on it labeled Test and Reset and if you find one hit the Reset button and see if the other outlets start working.
If the electrician that did the wiring was saving wire (preferable) the outlet closet to the fuse panel is the first one and the others downstream are further away. There is no absolute way to tell other than disconnecting one and see which others (downstream) are dead.
I'd suggest checking into the electrical codes for your location because often it's not legal for people to do their own electrical work without at least an inspection by an electrician BEFORE power is applied. Having said that, the black wire normally indicates "hot". I'd recommend that you try to look at a similar outlet to see how it is wired, or check Wikipedia for electrical wiring. House wiring is of course extremely dangerous. Make sure that you understand the safety rules before working on anything electrical.
The grid operates on 60 Hz. The grid operates on 50 Hz. For more information see the answers to the Related Questions shown below.
It depends. It could be improperly installed. Outlets can be GFI protected by using a GFI rated breaker in the main panel box. Look for a breaker in the panel box that has a push to test button on it. Press the push to test button then plug something into the outlet to see if it still works. If the breaker turns off the power then it is GFI protected. To reset it flip the breaker to the fully of position then back to the on position.
Your bathroom outlets might be connected to a GFCI Outlet. The Ground Fault Circuit Intercept outlet prevents you from electrocuting yourself in the odd chance that you drop an electrical appliance into the water of the bath tub while you're in it. Look around and see if there's one outlet with 2 buttons on it labeled Test and Reset and if you find one hit the Reset button and see if the other outlets start working.
Buy a tester. They are very cheap and will tell you at a glance if the outlets are wired correctly. The only other way is to remove the outlet and look see. But if it is a 2 prong outlet with no ground hole then it does not have a ground.
More than likely you have 1/2" or 5/8" drywall. Remove one of your electrical outlet covers, you should be able to see the depth of the drywall in the gap next to the outlet box.
It might help, but I would test your wiring first in few simple steps. Get a 12ga extension cable long enought to reach 20A outlet (usually above kitchen counter or sump pump). Plug your printer into 20A outlet using extension and see is its still dimming your lights, if it does try a different outlet, if problem exists no matter where you plug it, than a voltage regulator will not help. If you did find an outlet that solved light dimming than all you need is a licensed electrician to pull a pair of wires for printer dedicated outlet.
Unplug the UPS from the outlet with devices plugged into the UPS. You should unplug all devices from the uninterruptible power supply (UPS) and then unplug the UPS from the outlet. The UPS alarm should sound and you should be able to test the UPS outlets and verify that they have power.
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
The most common one you see around your home is the GFI outlet, (ground-fault interrupter), which monitors the balance of electricity going through the plug. If there is an imbalance, the switch will 'trip' and shut off the current. Another electrical safety device a plastic plug that is inserted into an unused electrical outlet to prevent children from sticking things into the plug holes and getting electrocuted. The third item is the breakers that control electrical current to the different parts of your home. This works on a larger scale, but is similar to how a GFI outlet works. Instead of monitoring just one plug, a breaker protects an entire circuit (or electrical zone) of a home or building.
The most common one you see around your home is the GFI outlet, (ground-fault interrupter), which monitors the balance of electricity going through the plug. If there is an imbalance, the switch will 'trip' and shut off the current. Another electrical safety device a plastic plug that is inserted into an unused electrical outlet to prevent children from sticking things into the plug holes and getting electrocuted. The third item is the breakers that control electrical current to the different parts of your home. This works on a larger scale, but is similar to how a GFI outlet works. Instead of monitoring just one plug, a breaker protects an entire circuit (or electrical zone) of a home or building.
To detect heart disease, you should see your doctor who can perform an EKG test. An EKG test can test the electrical currents to your heart to assess if they are performing properly.
If the electrician that did the wiring was saving wire (preferable) the outlet closet to the fuse panel is the first one and the others downstream are further away. There is no absolute way to tell other than disconnecting one and see which others (downstream) are dead.
I'd suggest checking into the electrical codes for your location because often it's not legal for people to do their own electrical work without at least an inspection by an electrician BEFORE power is applied. Having said that, the black wire normally indicates "hot". I'd recommend that you try to look at a similar outlet to see how it is wired, or check Wikipedia for electrical wiring. House wiring is of course extremely dangerous. Make sure that you understand the safety rules before working on anything electrical.
Fill it up with water and see if it works. If your pump has two wires coming out, unplug them from the outlet take a wire with male plug and connect it back to the power outlet for couple seconds, if pump start working it means your floating switch does not work.