GFI Issue

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Topic by Bureaucrat posted 03-24-2009 04:31 AM 11820 views 0 times favorited 4 replies Add to Favorites Watch
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5 posts in 4042 days

03-24-2009 04:31 AM

Topic tags/keywords: question electrical parts

I recently had an electrician install a 20 amp line into my workshop. He put in a GFI outlet according to code. I want to plug a 4’ shop light into this outlet until my rehab is done. Whenever I plug the shop light into the GFI directly, the GFI pops. If I put an extension cord in between the shop light and the GFI everything works fine. Does any one know what’s up with that? Is it likely that the shop light is a hazard?

-- It's too late to start earlier!

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Dan Lyke

331 posts in 4125 days

03-24-2009 04:47 PM

It’s possible that there’s something about how the ballast is charging that’s kicking your GFI, and having the extra copper in between makes a difference. I’d do two things:

1. See if the lamp triggers the GFI if you plug it in when it’s off. If it does, then you’ve got problems.

2. make sure that the lamp is hanging from something that isn’t conductive and check the voltage between the lamp case and ground. If the lamp casing is grounded, it should be zero. If it’s a two prong plug, make sure it’s fairly close to zero (ie: roughly what your voltmeter registers if you just leave the leads hanging).

If it’s not a three prong plug you might just want to run a ground wire to your lamp casing for safety.

(Not an electrician, but I do do some electronics work)

-- Dan Lyke, Petaluma California, http://www.flutterby.net/

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5 posts in 4042 days

03-25-2009 02:41 AM

Thanks Dan. It does not trip when the light is off. Will check the voltage as recommended.

-- It's too late to start earlier!

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