FHB Logo Facebook LinkedIn Email Pinterest Twitter X Instagram Tiktok YouTube Plus Icon Close Icon Navigation Search Icon Navigation Search Icon Arrow Down Icon Video Guide Icon Article Guide Icon Modal Close Icon Guide Search Icon Skip to content
Subscribe
Log In
  • How-To
  • Design
  • Tools & Materials
  • Restoration
  • Videos
  • Blogs
  • Forum
  • Magazine
  • Members
  • FHB House
  • Podcast
Log In

Discussion Forum

Discussion Forum

GFCI in sub-panel tripping

mlints | Posted in Energy, Heating & Insulation on November 27, 2006 01:20am

I’m doing a remodel with a sub-panel for the second floor.  Neutral and ground are isolated at the sub-panel.  I installed a GFCI for the bathroom circuit, but it keeps tripping as soon as I turn it on.  When I replace it with a regular breaker, everything seems to work fine.  Should I start looking for a stray connection between neutral and ground somewhere in the bathroom circuit, or could there be some other problem?

Reply

Replies

  1. User avater
    maddog3 | Nov 27, 2006 01:29am | #1

    did you connect the bathroom neutral to the GFI breaker ?

    did you connect the breaker pigtail neutral to the panel neutral ?

    .

    .

    .

    .Wer ist jetzt der Idiot

    ?

    1. mlints | Nov 27, 2006 01:48am | #4

      I'm working from memory, since I did this work a couple of  months ago.  I'm reasonably sure that I did connect the breaker pigtail to the panel neutral, but I don't believe that I connected the circuit neutral to the breaker.  This is the first GFCI breaker that I have installed, and the instructions left a lot to be desired. 

       

      I didn't know then, but now that I've read a few posts on how the GFCI works, it's pretty clear to me why the neutral has to run through the breaker for it to work properly.  I'll try it the right way and see how it works.  Thanks for the help.

      1. calvin | Nov 27, 2006 03:17am | #5

        Please return with the end of the story so we know you're not laying in a smoldering heap.

        thanks.A great place for Information, Comraderie, and a sucker punch.

        Remodeling Contractor just outside the Glass City.

        http://www.quittintime.com/

         

        1. mlints | Nov 27, 2006 05:39pm | #7

          Thanks for your concern.  The problem is in a vacation home that isn't used much this time of year, so it may be a while before I get a chance to go back and wire it correctly.  But I will post a message and let you know how it turns out (assuming that I'm not lying in a smoking heap.)

          1. calvin | Nov 28, 2006 03:00am | #8

            Thanks,

            Apart from the smoldering heap..............real knowledge here comes from individuals, the group and the occasional feedback from the poster that tries something and reports back.  Too many times a thread will go through all sorts of ideas and nothing is said on the final outcome.  Sucks bigtime.A great place for Information, Comraderie, and a sucker punch.

            Remodeling Contractor just outside the Glass City.

            http://www.quittintime.com/

             

  2. renosteinke | Nov 27, 2006 01:33am | #2

    Keep looking. Most common cause is an un-used screw on a receptacle coming to close, almost touching, the side of the box.

    Since you wired it, you know the path of the wires. I'd pick a spot in the middle of the run, and separate the wires there. Then, try the GFI. If it trips, your trouble is in the first half of the circuit; if not, the second. Now, put it all back together, and 'split in half' the bad section. And so on....

  3. pm22 | Nov 27, 2006 01:35am | #3

    You seem to be on the right track for solving this problem.

    Make sure you connected the white wires in the panel correctly [neutral to breaker and curly wire to neutral bar]. Perhaps disconnect the neutral from the neutral bar and check for continuity to ground. Also if anything is plugged in, unplug them to rule out a defective appliance.

    ~Peter

    Vivaldi was wrong. There are five seasons.

  4. DanH | Nov 27, 2006 04:35am | #6

    Probably the neutral is crossed. If, eg, there is a fan that shares a neutral, it must be on the same GFCI.

    And of course the neutral must be connected to the neutral connection of the GFCI, not to the neutral bus. The GFCI's neutral wire must be then tied to the neutral bus.

    People never lie so much as before an election, during a war, or after a hunt. --Otto von Bismarck

Log in or create an account to post a comment.

Sign up Log in

Become a member and get full access to FineHomebuilding.com

Video Shorts

Categories

  • Business
  • Code Questions
  • Construction Techniques
  • Energy, Heating & Insulation
  • General Discussion
  • Help/Work Wanted
  • Photo Gallery
  • Reader Classified
  • Tools for Home Building

Discussion Forum

Recent Posts and Replies

  • |
  • |
  • |
  • |
  • |
  • |
View More Create Post

Up Next

Video Shorts

Featured Story

The Trump Administration Wants to Eliminate the Energy Star Program

The end of this program will likely lead to higher energy bills and fewer business opportunities for the American people.

Featured Video

Builder’s Advocate: An Interview With Viewrail

Learn more about affordable, modern floating stairs, from design to manufacturing to installation.

Related Stories

  • The Trump Administration Wants to Eliminate the Energy Star Program
  • Podcast Episode 685: Patching Drywall, Adding Air Barriers, and Rotted Walls
  • FHB Podcast Segment: Patching Drywall Near a Shower
  • The Unabashed Maximalist

Highlights

Fine Homebuilding All Access
Fine Homebuilding Podcast
Tool Tech
Plus, get an extra 20% off with code GIFT20

"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Fine Homebuilding Magazine

  • Issue 331 - June 2025
    • A More Resilient Roof
    • Tool Test: You Need a Drywall Sander
    • Ducted vs. Ductless Heat Pumps
  • Issue 330 - April/May 2025
    • Deck Details for Durability
    • FAQs on HPWHs
    • 10 Tips for a Long-Lasting Paint Job
  • Issue 329 - Feb/Mar 2025
    • Smart Foundation for a Small Addition
    • A Kominka Comes West
    • Making Small Kitchens Work
  • Issue 328 - Dec/Jan 2024
    • How a Pro Replaces Columns
    • Passive House 3.0
    • Tool Test: Compact Line Lasers
  • Issue 327 - November 2024
    • Repairing Damaged Walls and Ceilings
    • Plumbing Protection
    • Talking Shop

Fine Home Building

Newsletter Sign-up

  • Fine Homebuilding

    Home building tips, offers, and expert advice in your inbox.

  • Green Building Advisor

    Building science and energy efficiency advice, plus special offers, in your inbox.

  • Old House Journal

    Repair, renovation, and restoration tips, plus special offers, in your inbox.

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters

Follow

  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X
  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X

Membership & Magazine

  • Online Archive
  • Start Free Trial
  • Magazine Subscription
  • Magazine Renewal
  • Gift a Subscription
  • Customer Support
  • Privacy Preferences
  • About
  • Contact
  • Advertise
  • Careers
  • Terms of Use
  • Site Map
  • Do not sell or share my information
  • Privacy Policy
  • Accessibility
  • California Privacy Rights

© 2025 Active Interest Media. All rights reserved.

Fine Homebuilding receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

X
X
This is a dialog window which overlays the main content of the page. The modal window is a 'site map' of the most critical areas of the site. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page.

Main Menu

  • How-To
  • Design
  • Tools & Materials
  • Video
  • Blogs
  • Forum
  • Project Guides
  • Reader Projects
  • Magazine
  • Members
  • FHB House

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Popular Topics

  • Kitchens
  • Business
  • Bedrooms
  • Roofs
  • Architecture and Design
  • Green Building
  • Decks
  • Framing
  • Safety
  • Remodeling
  • Bathrooms
  • Windows
  • Tilework
  • Ceilings
  • HVAC

Magazine

  • Current Issue
  • Past Issues
  • Magazine Index
  • Subscribe
  • Online Archive
  • Author Guidelines

All Access

  • Member Home
  • Start Free Trial
  • Gift Membership

Online Learning

  • Courses
  • Project Guides
  • Reader Projects
  • Podcast

More

  • FHB Ambassadors
  • FHB House
  • Customer Support

Account

  • Log In
  • Join

Newsletter

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Follow

  • X
  • YouTube
  • instagram
  • facebook
  • pinterest
  • Tiktok

Join All Access

Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features.

Start Your Free Trial

Subscribe

FHB Magazine

Start your subscription today and save up to 70%

Subscribe

We hope you’ve enjoyed your free articles. To keep reading, become a member today.

Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine.

Start your FREE trial

Already a member? Log in