Results 1 to 5 of 5

Thread: Metallic bonding around egc

  1. #1
    Join Date
    Jan 2004
    Location
    Maryland
    Posts
    313

    Metallic bonding around egc

    Could someone please refresh my memory , if a egc ì run in a metallic sleeve for protection does it get bonded at one or both ends? I remember something about choke effect. I just read a job spec that called for bonding on both ends, but thought you only bonded one end to avoid the choke effect. Code article ?

    Thanks

  2. #2
    Join Date
    Dec 2007
    Location
    NE Nebraska
    Posts
    33,485
    Quote Originally Posted by jimport View Post
    Could someone please refresh my memory , if a egc ì run in a metallic sleeve for protection does it get bonded at one or both ends? I remember something about choke effect. I just read a job spec that called for bonding on both ends, but thought you only bonded one end to avoid the choke effect. Code article ?

    Thanks
    EGC (equipment grounding conductor) should be run with the feeder or branch circuit conductors it goes with and never alone.

    GEC (grounding electrode conductor) and bonding jumpers however may be run alone and do need to be bonded to both ends of any ferrous sleeve to reduce inductive effects.

  3. #3
    Join Date
    Jan 2004
    Location
    Maryland
    Posts
    313
    Thanks. Darn auto correct and I missed the switch. I meant gec.

  4. #4
    Join Date
    Jun 2006
    Location
    Ohio
    Posts
    21,385
    A short (undefined by Code) protection or support sleeve for other than GEC's is not required to be bonded by Code.

    Given your project spec' says bond on both ends, you will be held to bond on both ends.
    I will have achieved my life's goal if I die with a smile on my face.

  5. #5
    Join Date
    Jan 2009
    Location
    Maryland
    Posts
    11,958
    Here is the code section requiring it.

    250.64
    (E) Raceways and Enclosures for Grounding Electrode
    Conductors.
    (1) General. Ferrous metal raceways and enclosures for
    grounding electrode conductors shall be electrically continuous
    from the point of attachment to cabinets or equipment
    to the grounding electrode and shall be securely fastened
    to the ground clamp or fitting. Ferrous metal
    raceways and enclosures shall be bonded at each end of the
    raceway or enclosure to the grounding electrode or grounding
    electrode conductor.
    Nonferrous metal raceways and enclosures
    shall not be required to be electrically continuous.

    Attachment 18361
    "Electricity is really just organized lightning." George Carlin


    Derek

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •