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Thread: Grounding compression-type connector & tooll

  1. #1
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    Grounding compression-type connector & tooll

    The grounding electrode conductor must be cotinuous without slices, except:
    [/b]2008 NEC 250.64(C)(1)[/b]

    Splicing shall be permitted by irreversible compression-type connectors listed as grounding and bonding equipment . . .
    I'm interested in splicing through #4 copper with, hopefully, a handtool.

    Are most common butt slices suitable?
    Another Al in Minnesota

  2. #2
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    Al, do you want to splice solid or stranded wire? I'm not sure if you can get but splices for solid wire. I generally use C-Taps to splice GEC's. For #4 you would use an Ilsco ULT-5-Z and for #6 an ULT-4-Z. I can get you Burndy part numbers if you need them. Both of these use a BG or 5/8" die. Do you already have a tool or are you looking to purchase one? A Greenlee K425BG is an inexpensive had tool that will crimp these connectors.

    Here is the crimp tool http://www.toolup.com/greenlee/K425BG.html
    Curt Swartz
    Electrical Contractor

  3. #3
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    Al,
    You will have to look at the listing of the connector to find out if it listed for grounding and bonding. After you find a connector that is so listed, you will have to use a tool that is identified for use with that connector. With some connectors, the only identified tool is one made by the connector manufacturer.
    Don, Illinois
    "It is the first responsibility of every citizen to question authority." B Franklin

  4. #4
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    Curt,
    It does not appear that that connector is listed a bonding and grounding equipment. It is listed to UL486A which is the standard pressure connection listing. Grounding and bonding equipment must be listed to UL487. While it is true that in general 250.8 will permit this connector as part of the grounding path, it does not meet the requirements of the rule that Al cited.
    Don, Illinois
    "It is the first responsibility of every citizen to question authority." B Franklin

  5. #5
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    Quote Originally Posted by curt swartz View Post
    Al, do you want to splice solid or stranded wire?
    I hope to find a versatile tool that will handle both. #8 & #6 are most common as solid. #4 & up, stranded. And be a tool that is capable of common (non-GEC) splices.

    I am willing to buy a new tool.
    Last edited by al hildenbrand; 09-01-10 at 02:43 PM.
    Another Al in Minnesota

  6. #6
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    Quote Originally Posted by al hildenbrand View Post
    I am willing to buy a new tool.
    I suggest a used TBM8 or TBM6 and using H or C taps

  7. #7
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    Don, you appear to be correct. I have not installed many C-Taps for GEC but have on occasion if the existing wire has been damaged or is too short for a panel replacement. The few I have used have been Burndy but I gave Al the equivalent Ilsco part number since the Burndy web site can be a pain to use. I actually called Burndy and they confirmed that these particular C-Taps are not listed for grounding. They do make a version listed for grounding but they must be installed with a hydraulic tool.

    I guess I have never really understood why a connector that is listed to carry continuous current is not also listed for grounding.
    Curt Swartz
    Electrical Contractor

  8. #8
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    Quote Originally Posted by dereckbc View Post
    I suggest a used TBM8 or TBM6 and using H or C taps
    Dereck, as Don posted and I confirmed standard C and H Taps are not listed for grounding. According to Burndy they do make a C-Tap that is listed for grounding but it can not be crimped with hand tools. The dies are only available for hydraulic tools.
    Curt Swartz
    Electrical Contractor

  9. #9
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    I see, at the ILSCO site, that the ETL copper E crimps are UL 467 listed for grounding & bonding, but the sizes are not down in the #8, #6 and #4 range (the size range I'm most interested in).
    Last edited by al hildenbrand; 09-01-10 at 06:05 PM.
    Another Al in Minnesota

  10. #10
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    The Burndy YGHC C-Taps are UL467 listed and available for larger wire.
    http://portal.fciconnect.com/Comergent//fci/drawing/electrical/yghc.pdf
    Curt Swartz
    Electrical Contractor

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