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Thread: 3 Phase GFCI for portable tools

  1. #1
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    3 Phase GFCI for portable tools

    I have a concrete cutting contractor that requires a 3 Phase GFCI 20 amp for his portable wet cutting saw, he's using a gas powered generor for the supply. Is there such a device on the market that can trip out at 5ma?

    Also can the GFCI work without a load neutral?
    Thanks,
    Ian Reece, Ontario Canada

  2. #2
    Join Date
    Mar 2010
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    Check Bender.org They have tons of GFCI and GFP options. I would not have thought that 5mA would be appropriate for this application but I do not know.

    http://www.bender.org/products_list....FVa1wAodDwIJcg

    1N73LL1G3NC3 15 7H3 4BILI7Y 70 4D4P7 70 CH4NG3.

  3. #3
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    5mA isn't likely going to work, but it's probably not required either. There is a whole new class of GFCIs now for things like this, read this article and see which class of GFCI applies, then do a search for that class of GFCI. Most mfrs have released products now to fill this requirement.
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  4. #4
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    Quote Originally Posted by Jraef View Post
    5mA isn't likely going to work, but it's probably not required either. There is a whole new class of GFCIs now for things like this, read this article and see which class of GFCI applies, then do a search for that class of GFCI. Most mfrs have released products now to fill this requirement.
    Where is the article?
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  5. #5
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    Extension Cord

    I have the same question. I came across a portable machine, 3phase. 208v 20a extension cord that is ran outside the building. L15-20 twist lock extension cord, 100' long. 14-4 or 12-4 extension SJ cord. They wheel the machine outside on nice days, and cut material. Does this need a GFI ?

    Is there a 3 phase GFI that will work with a motor starter?

  6. #6
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    Quote Originally Posted by ActionDave View Post
    Where is the article?
    Oops, sorry, never noticed that the link wasn't there!

    http://www.csemag.com/single-article...1d51ba57a.html
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  7. #7
    Join Date
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    Quote Originally Posted by Jraef View Post
    Oops, sorry, never noticed that the link wasn't there!

    http://www.csemag.com/single-article...1d51ba57a.html
    Small typo: "NEC requires them on all 5-amp and 20-amp 125-V utility outlets used in locations such as ....",
    and the flow chart path to Class C does not properly represent the AND logic.

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