The depth to bury conduit for a detached garage EV charger is set by code and depends on the wiring method, with a common requirement being around 18 inches of cover for PVC conduit, while other methods and conditions require different depths. Running power underground to a detached garage for EV charging must follow the code’s burial depth rules for the method used. Because the exact depth depends on the method and situation, it is determined by a licensed electrician per the applicable code. Understanding the general picture helps you plan the project.

Here is what to know about burial depth for a detached garage EV charger.

Minimum burial depths are set by code and depend on the wiring method, voltage, and conditions, so always confirm the required depth with a licensed electrician and the applicable code.

Burial depth depends on the wiring method

There is no single burial depth for all situations; the code specifies minimum cover depths based on the wiring method and conditions. Different methods, such as PVC conduit, rigid metal conduit, or direct-burial cable, have different minimum depths, and factors like the circuit’s voltage and location can affect the requirement. So the first thing that determines the depth is how the underground run is wired.

A common figure for PVC conduit

For a typical underground run using PVC conduit, a common minimum cover is around 18 inches, which is frequently used for residential circuits in PVC conduit. So running EV charger wiring to a detached garage in PVC conduit commonly involves burying it to roughly this depth. This is a general reference, and the exact required depth for your installation depends on the method and conditions, confirmed against the code.

Other methods and depths

Other wiring methods have different burial depth requirements:

• Direct-burial cable (without conduit) typically requires a greater depth than PVC conduit
• Rigid metal conduit may allow a shallower depth in some cases
• Depths can vary with the circuit voltage and specific conditions

Because the depth depends on the method chosen, the electrician selects a wiring method and buries it to the corresponding required depth. The common 18-inch figure applies to PVC conduit, but the right depth for your method could differ.

Why burial depth matters

Burial depth matters because adequate cover protects the underground wiring from damage, such as from digging, surface activity, or the elements, and keeps it safe. Burying the wiring too shallow risks damage, which is why code specifies minimum depths for each method. Meeting the required depth ensures the underground run to the detached garage is protected and compliant, which is part of a safe installation.

Planned and installed by an electrician

Because the required burial depth depends on the wiring method, voltage, and conditions, and because running power to a detached structure involves additional code considerations, the work is planned and installed by a licensed electrician. They select the appropriate wiring method, bury it to the correct depth, and handle the other requirements of feeding a detached garage (such as grounding and any subpanel), to code, with a permit and inspection. This ensures a safe, compliant underground installation.

The depth to bury conduit for a detached garage EV charger is set by code based on the wiring method, with a common figure of around 18 inches of cover for PVC conduit, while direct-burial cable typically needs more and other methods differ. Adequate depth protects the wiring from damage. Because the exact depth depends on the method and conditions, a licensed electrician selects the method, buries it to the correct depth, and handles the detached-structure requirements to code.

Stella Electric wires detached garages and outbuildings for EV charging for homeowners across the Baltimore area and throughout Maryland, with flat-rate pricing and no overtime charges. If you need a charger at a detached garage, we can run it properly. Financing is available on qualifying projects.