How to test for reverse polarity

If the wires of an outlet are reverse there is the possibility that the electrical current may damage appliances and electrical motors. Sometimes wires get crossed and you encounter reverse polarity , which can damage your electrical appliances. Much better than the $Fluke is a $led tester (like the one shown in the noshockzone video suggested below).

This instantly tells you reverse polarity as well as several OTHER dangerous conditions. Fluke -A1-II Volt-Alert AC Non-Contact Voltage Tester : Amazon.

Tw7CY Fluke 1Electricians True RMS Multimeter: Amazon.

Reverse polarity” is the term used to describe this situation.

Measure the voltage between the wider opening and the ground. If your readings are reversed , your polarity is reversed. How do you correct this if your polarity is reversed ? Turn the power off to the outlet by opening the breaker or pulling the fuse.

Check the outlet again to be sure it is . One Test Electricians Carry Out With Electrical Inspections Is Checking The Polarity At Socket Outlets Is Correct. Make absolutely sure you are not grounded (and no pets or children are around). Make sure the digital voltmeter is definitely on the voltage setting. Please always use your meter, learn how to use it on basic tests.

Check all wiring with it before you do anything, verify voltages, amps, polarity , etc, and just take your time. The more basic your level, the more time and caution to use. If you have outlets in your home with reverse polarity , then you are not alone.

We often find these on home inspections. In this video Maggiore Inspections discusses reverse polarity in an electrical system. That reading is the one that will often show up when the actual condition is the more common one called open neutral. This master electrician only explains why on his website, not here. Connect the positive probe (red lead) to the chassis or ground terminal of the unit under test.

Plug the component into the wall socket and turn on the power switch. Reverse the position of the plug in the wall socket and repeat step 5. You can test for reversed polarity at your outlets with an inexpensive outlet tester - they cost about $at any home improvement store. The polarity test is the 8th test in the sequence.

Electronic equipment plugged in to an outlet with reversed polarity will still function properly.