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!

*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.

Jobs

HV, LV and Communication cables in same precast trench

HV, LV and Communication cables in same precast trench

(OP)
Hi, I can't find any reference in code about using same precast trench to lay HV, LV and Communication cables in the same one. I would use a divider for the HV cable anyway. So, the question is if I can use the same trench (not direct buried but precast) at all. I'd appreciate your help. Thanks, Gus

RE: HV, LV and Communication cables in same precast trench

if the HV has a physical separation sufficient for the use, electric ok. But comms will want to approve, or not, shouldnt matter if its fiber in its own duct, but if comms is copper, ask them if they ok it or not.

RE: HV, LV and Communication cables in same precast trench

In the US, the HV (>1000) must be physically separated - a separate conduit is OK. But I'd strongly urge a separate trench and manholes for the HV cable. I've tried it in a common trench/duct bank and really regretted it. It can be done legally, but it is a PITA. If the comm ckts belong to telco or other, then they have the last word on that generally.

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


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close