Power Lines | CET Management Solution LLC | United States

How deep are power lines buried?

Power lines

In General Power Lines Depth.

There are several key factors to consider when determining the possible presence, depth and protection of underground power lines. Luckily, all fifty states provide a toll free hotline that will connect you to professional utility location services that will come and locate any underground power lines for free. Requirements for buried power lines can differ geographically. Although the National Electric Code provides minimum specifications for underground low voltage electrical circuits, the physical characteristics of the installation will determine the actual depth.


Direct Burial Installation

There are two common methods of installing underground power lines. The direct burial method is the placement of a multi-conductor cable with a jacket that is manufactured to resist the elements of corrosion associated with soil and moisture. The minimum depth requirement of a direct burial cable is 24 inches, except when installed under a concrete slab with a minimum thickness of 2 inches. In this case, the cable can be installed at only 18 inches deep.

Installing in a Raceway

Another option is to install an underground raceway, also known as a conduit to house separate individual conductors. When installing a non-metallic underground raceway, the minimum burial depth is 18 inches, except when installed under a concrete slab with a minimum thickness of 2 inches, in which case the conduit can be installed at only 12 inches deep. When installing an underground metallic raceway, the minimum burial depth is a mere 6 inches.

Call Before You Dig

If you are considering an excavation of any depth, don't gamble with your safety. Even small jobs like planting a shrub or tree on your property requires that you call 811 before you start digging. Failure to do so can result in damage to underground systems, heavy fines, repair costs and serious injury or death.



    • Related Articles

    • How do I measure for windows treatments?

      MOUNTING CONSIDERATIONS:             Why Choose an Inside Mount?             Clean look: Allows for showcasing attractive window or door molding. THINGS TO CONSIDER: Deductions and Light Gaps: A small deduction in width and/or length is taken to ...
    • Is there a standard amount of outlets per room/sf?

      Common Electrical Code Requirements by Room Below is a reference point to some common electrical code requirements by room. However, you may still want to consult with your city or county electrical code compliance office or inspector for there ...
    • How do I stop my Xbox one from turning off?

      One possible solution is to check the "Configure Auto Shutdown Settings" for the Xbox One. Press the Menu key of the controller and then go to Settings > Power & startup > Turn off after. Select one of the following options: 1 hour of inactivity, 6 ...
    • Samsung galaxy A6 has a blue moving box on lock screen, Why?

      Sounds like the universal switch is enabled that is the cause of the blue box. By pressing the power button and volume up button together rapidly 2 - 3 time to disable. Reference: ...
    • What is a recirculating vent on a microwave?

      Recirculating Vents The vent is on the top rear as with most over-the-range microwaves. Traditionally, it is vented through a duct system to the outside or you can choose to recirculate it, which means just that--the air recirculates as opposed to ...