Results 1 to 9 of 9
  1. #1
    Ryan Stouffer's Avatar
    Ryan Stouffer Guest

    Default Service entrance ground wire

    There are two 70 amp. services coming into this service box but only one ground wire is that acceptable.

    Similar Threads:
    ***IMPORTANT*** You Need To Register To View Images ***IMPORTANT*** You Need To Register To View Images
    NHIE Practice Exam

  2. #2
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,481

    Default Re: Service entrance ground wire

    Quote Originally Posted by Ryan Stouffer View Post
    There are two 70 amp. services coming into this service box but only one ground wire is that acceptable.
    Ryan,

    I don't think you can really call them mains, since main refers to one, but I am at a loss as to what to call it.

    The single ground is fine.

    You probably noticed that the doubled neutral conductors in pic #4 are not. Each conductor should have it's own terminal.

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  3. #3
    Join Date
    Apr 2009
    Location
    NY State
    Posts
    440

    Default Re: Service entrance ground wire

    Quote Originally Posted by Gunnar Alquist View Post

    I don't think you can really call them mains, since main refers to one, but I am at a loss as to what to call it.
    Actually Gunnar, there can be up to SIX "mains".

    Those are both "main disconnects" or "service disconnects".


  4. #4
    Join Date
    Apr 2009
    Location
    NY State
    Posts
    440

    Default Re: Service entrance ground wire

    Quote Originally Posted by Gunnar Alquist View Post
    You probably noticed that the doubled neutral conductors in pic #4 are not. Each conductor should have it's own terminal.
    Exactly.
    What's crazy is that there is an empty lug right there.


  5. #5
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,252

    Default Re: Service entrance ground wire

    Quote Originally Posted by Ryan Stouffer View Post
    There are two 70 amp. services coming into this service box but only one ground wire is that acceptable.

    "two ... services coming into" or do you mean 'two feeders going out from' that service equipment?

    I see the meter right there to the right, which likely means there are bus bars feeding those two mains, which are feeding (i.e., 'have feeders' going out to panels).

    On the open lug and double tapped neutrals I am going to guess that who ever wired that up (most likely an electrician as that is service equipment) looked at the larger neutral terminal lug and the smaller ground terminal lugs and thought to themselves ... 'Hmmmm ... I have 3 ground wires and 2 neutral wires but only 1 neutral terminal.', not realizing that at service equipment they are all basically both.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  6. #6
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,481

    Default Re: Service entrance ground wire

    Quote Originally Posted by Speedy Petey View Post
    Actually Gunnar, there can be up to SIX "mains".

    Those are both "main disconnects" or "service disconnects".
    Well, that is good to know. I have never know what to call it when there are multiple mains.

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  7. #7
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,252

    Default Re: Service entrance ground wire

    Quote Originally Posted by Gunnar Alquist View Post
    I have never know what to call it when there are multiple mains.

    Gunnar,

    You know what to call it ... you just did: "multiple mains".

    Those multiple mains, however, cannot be added up to determine a service size.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  8. #8
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,481

    Default Re: Service entrance ground wire

    Quote Originally Posted by Jerry Peck View Post
    Gunnar,

    You know what to call it ... you just did: "multiple mains".

    Those multiple mains, however, cannot be added up to determine a service size.
    Of course not. They are "multiple mains", so you multiply! Right?

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  9. #9
    Join Date
    Apr 2009
    Location
    NY State
    Posts
    440

    Default Re: Service entrance ground wire

    Quote Originally Posted by Gunnar Alquist View Post
    Of course not. They are "multiple mains", so you multiply! Right?



Bookmarks

Posting Permissions

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