×
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

Going from PVC (concrete ductbank) to RMC (stubups/aboveground) Part 2

Going from PVC (concrete ductbank) to RMC (stubups/aboveground) Part 2

Going from PVC (concrete ductbank) to RMC (stubups/aboveground) Part 2

(OP)
My initial post was as follows:

A concrete, below-ground, ductbank system made up of PVC conduit.  At every point of stub-up, a transition from PVC to RMC is performed.  The RMC will have a grounding bushing on it and it will be connected to the system ground grid.  Is this an acceptable installation?  Note, each piece of equipment has its own ground.  Any motors will also have a dedicated stringer to the system ground grid.

Another questions has come to light...something that I didn't factor into the equation and now need some insight.

The bulk of the area is a Class I Div II area...with some Class I Div I areas(3-5' radius' here and there)and some non-classified areas.  Is the above installation still acceptable?  The top of the ductbank will be 2' below top of grade.  The conduits will be encased with 2500 psi concrete with a minimum of 3" of concrete above and below each conduit and 2" on any side. The rigid metal conduit will be used for the last two (2) feet prior to emergence from concrete.

Thanks again!

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