Click Here to Receive DIY Electrical Wiring Help from a Master Electrician


Minimum Burial Depth for Rigid Metal Conduit

June 18, 2006

Q: What is the minimum burial depth for rigid metal conduit?

A: It depends on where you are burying the conduit. Under 2″ of concrete and all locations not listed below, the rigid conduit needs to be 6″ deep.

If the conduit is going to run under 4″ or more of an exterior concrete slab with no vehicular traffic and the slab extending not less than 6″ beyond the underground installation,┬áit only needs to be 4″ deep.

If buried under streets, highways, roads, driveways and parking lots, 24″ deep.

If buried under one- and two-family dwelling driveways, and outdoor parking areas and used only for dwelling related purposes, it need to be 18″ deep.

If buried in or under airport runways, including adjacent areas where trespassing prohibited, it needs to be 18″ deep.

This is according to the National Electrical Code table 300.5 minimum cover requirements, 0 to 600 volts, nominal.

I would also recommend checking with your local authority having jurisdiction (building codes division or electrical inspector), as they may have stricter codes.

DIY Electrical Wiring Help from a Master Electrician Do you need assistance with your electrical wiring project? Please visit my DIY Electrical Wiring Help from a Master Electrician page. Where I provide electrical wiring tips, expert electrical advice, answers to your electrical questions and electrical consulting & design services over the phone, via instant messenger or via email.

If you enjoyed this post, make sure you subscribe to my RSS feed or receive updates via email. You can also follow me on Twitter and "LIKE" me on Facebook.

Similar Posts:
Site Sponsor


Do you have a question or idea to add to this post? Feel free to post it below. Due to a large backlog and an overwhelming response, it takes approximately 30 days to receive an answer to your electrical question for free. Simply subscribe to this blog (use one of the subscription methods listed in the top right corner of this page) and your answer will be listed in a new blog post in the near future.

To receive an immediate answer (in less than 24 hours) please visit my DIY Electrical Wiring Help from a Master Electrician page.

Please solve the following simple math problem so that we know you are a real person * Time limit is exhausted. Please reload CAPTCHA.