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I'm trying to ground an outlet in my home to the metal of the junction box. I'm using a grounding pigtail of 14AWG wire with a 10/32 terminal attached to one end. Unfortunately it seems the metal enclosure doesn't have a tapped hole that could fit. There simply only seems to be conduit knock outs and mounting holes that are way larger to the screw in question, I'd estimate a bit less than a 1/4".

What other options do I have for connecting this grounding wire to the enclosure?

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    If your certain the box itself actually has ground, drill a hole and use a self-tapping screw.
    – Tyson
    Mar 6, 2017 at 23:12
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    Can you post a photo of the inside of the box?
    – ThreePhaseEel
    Mar 6, 2017 at 23:13
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    @Tyson Sheet-metal screws are specifically disallowed. Self-tapping screws need to be -32 or finer. The reason is required thread engagement.
    – Harper - Reinstate Monica
    Mar 7, 2017 at 1:37
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    I guess I should have added ... they sell green colored self tapping screws just for this purpose.. @Harper
    – Tyson
    Mar 7, 2017 at 1:41

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If you are certain that the box is properly grounded, you can use grounding clips

grounding clip

The wire is attached to the clip and the clip to the front edge of the box.

Images and links are illustrative only, not an endorsement of goods or sources.

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  • Thanks! I actually found a box with the correct 10-32 hole, but unfortunately, it seems the actual junction/conduit isn't a good ground path :(. Looks like it's time to buy a UPS for my electronics!
    – user20740
    Mar 7, 2017 at 23:55

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