Jump to content
Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

Stay connected with us...

Subscribe to our YouTube channel for lots of appliance repair tips and help! Subscribe to our MST Radio podcast to learn secrets of the trade. Sign up for our free newsletter and keep up with all things Appliantology.



Recommended Posts



PLEASE tell me a SIMPLE WAY to use a multimeter (ohms setting) to check BOTH a 2 and 3 prong power tool for current leakage.

Doesn't the switch have to be in the "ON" position when testing?(Power tool unpluged).

What are the Specific Readings of Resistance I should have.

This is what I think in each case.

2prong infinite

3 prong infinite(2 prongs) ground prong zero

I CAN NOT find this on YOUTUBE.

Thank you for being patient. I haven't mastered how to post and such correctly.



  • Like 1

Share this post

Link to post
Share on other sites

Need appliance parts? Call 877-803-7957 now!


Plug in tool. Throw into bucket of water. If it starts running there is leakage.

Seriously... Isnt this a repost? Two wire tools are double insulated. Are you checking for safety or what? You could check for voltage from the metal housing to ground (of a outlet) while running, any would be bad. Three wire would be basically the same. Voltage from housing to ground is bad. Or check resistance from the housing to the plug ends. The only one that should have any is tool housing to ground prong of three wire.

If posting a question in the same topic Is this complicated, maybe you should invest in cordless tools :)

Edited by Bullstok
  • Like 2

Share this post

Link to post
Share on other sites

use of a "portable" GFI when using your power tools,

If it ever "trips", may be time for a new tool.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.