How do I use a multimeter to test an outlet for current?

Question

Want to know if my 220 volt dryer outlet is getting the entire current

Answer 1

Use your multi meter to measure the voltage while the hair dryer is running. (Open the dryer cover and put the meter on the lines coming into the dryer). But for crying out loud, BE CAREFUL!

If you measure the proper voltage under load, then the dryer is getting enough current. If the voltage drops, then your dryer is taking too much current and may need repair.

Answer 2

What is the reason why you are questioning this? Are you seeing something that you think is unusual?

Essentially, you cannot measure current with most multimeters. Also 220 volt is a nominal voltage, it is not something that you can expect to be exact. The exact voltage depends on many factors that are essentially unimportant here.

Does the dryer seem to work properly? Are the wires going to it hot when it is running?

You can measure the voltage at the plug with the dryer not running and then running. There should be very little difference between the two readings.

Answer 3

Well you could test each side of the outlet and you should have 110 volts per side, which equals 220 if you just have the basic outlet tester. Just remember that one also has to stay in the ground side. Thats the side with the L shape in the outlet.

Answer 4

If you are really trying to measure current, then rent or buy a clamp on ampmeter. Using a multimeter means you have to disconnect wiring to check current. If you are checking for voltage, then you set the meter to the proper range and stick the probes in the outlet. Best to call appliance repairman.

Answer 5

set the meter on 240V and stick the prongs on the outlet. it will not read exactly 220, but it shouldnt read any lower than 220.