×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Grounding Question

Grounding Question

Grounding Question

(OP)
If I have the grounding cable of LV Xtr or panel for example and I want to route it to the nearest ground bus I have in the past enclosed this conductor in PVC conduit, in the event that  I need to enclose this ground in a "metallic" conduit (RGS) in lieu of the PVC do I have to bond both ends of this conduit to the grounding cable.

RE: Grounding Question

Maybe this?

99NEC 250-64. Grounding Electrode Conductor Installation.  (e) Enclosures for Grounding Electrode Conductors.  Metal 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. Metal enclosures that are not physically continuous from cabinet or equipment to the grounding electrode shall be made electrically continuous by bonding each end to the grounding conductor. Where a raceway is used as protection for a grounding conductor, the installation shall comply with the requirements of the appropriate raceway article.  

The IAEI SOARES BOOK ON GROUNDING explains the need very well, with some actual field tests.  

RE: Grounding Question

(OP)
Thanks for the reply post, the book you refence is this available ON LINE

RE: Grounding Question

Suggestions:
1. Visit
http://www.nfpa.org
for NFPA 70-1999 National Electrical Code
2. Also,
IEEE Std 142-1991 "IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems"
Section 2.2.6 Bonding of Metal Sleeves Enclosing a Grounding Conductor supplements the NFPA 70 by good explanations, e.g. Figure 33 Bonding of Metal Enclosure, and L x di/dt, or Xl x Iac, etc.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources