Can the gas line share the same trench with the electrical conduit? They are both branch circuits and are not on the service side.
I know it is not an NEC issue.
Thank you.
Niko:
Check locally IMHO.
Here in NJ it's not an issue as long as they are not 'side-by-side'.
You may have siesmic issues.
I agree with John. Local policy will dictate this and it may actually be the utilities driving it.
Pacific Gas & Electric does not permit it.
Underground natural gas delivery is by plastic.
No way will PG&E suffer compounding fires -- electric then gaseous.
Common trenches out my way are restricted to power, data, coax... with various horizons at least 12" apart -- sometimes more.
Fresh water, dark water, fire systems, and gas are not permitted in the common trench.
Customer side power is not permitted in the same horizon ( depth ) as utility lines. Utility power is always to be the deepest in the trench -- except if crossing.
Thanks guys.
I have emailed the plumbing inspector for advice.