How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
Does GFCI still work on an ungrounded receptacle outlet?
Thursday, February 27, 2020
Yes, a GFCI at an ungrounded receptacle will still trip under a ground fault, and it will protect any other receptacles downstream in the circuit. The test button will also work to verify that the GFCI is functioning properly, but the receptacle should be marked with one of the small “NO EQUIPMENT GROUND” stickers that come in the box with the GFCI receptacle. Also, a GFCI breaker in the panel will also protect any ungrounded receptacles on its circuit.
Although a ground is not necessary for a GFCI to work, an ungrounded receptacle cannot be tested for GFCI protection with a 3-light plug-in tester because it has to be able to shunt a little current to ground to do the test. Also, see our blog post Can you plug a surge protector into a two prong outlet?
• • • • • • • • • • • • • • • • • • • • • • • • • • •
Here’s links to a collection of our other blog posts about AFCI and GFCI RECEPTACLES AND CIRCUIT BREAKERS:
of Blog Posts
Top 5 results given instantly.
Click on magnifying glass
for all search results.
Buying a home in North/Central Florida? for a team inspection by two FL-licensed contractors and inspectors. Over 8,500 inspections completed in 20+ years. In a hurry? We will get it done for you.