How to Install an Underground Electric Service

By Dave Rongey - Summary:

How should I install the cable for an underground electric service? How to Install an Underground Electrical Service, I want to run an underground electric service from a breaker box.

Electric Circuit Panel

Electrical Question: How should I install the cable for an underground electric service?

  • I want to run an underground electric service from the outside breaker box.
  • The service will be to run fans, lighting and misc. appliances as necessary.
  • Do I need to put the wire inside conduit or is there a type of wire I can use for under grounding that does not require conduit?
  • What size circuit breaker should be installed for this?


This electrical wiring question came from: Ed, from Hawthorne, Florida.

Dave’s Reply:
Thanks for your electrical question Ed.

Installing an Underground Electrical Service

underground electrical

Application: Installing a Main Electric Service Panel.
Skill Level: Advanced – Best installed by a Licensed Electrical Contractor.
Tools Required: Electricians pouch of hand tools and the various power tools necessary for the specific method of electrical service installation.
Estimated Time: Depends on the type of panel, the location, and available access to the project area.
Precaution: This is an extensive project. Working in an electric panel has possible arc flash hazards and should be performed by a Licensed Electrical Contractor.
Notice: Installing an Electrical Service Panel should be done according to local and national electrical codes with a permit and be inspected.

How to Install an Underground Electric Service

Install Electric Service

Planning to Install an Underground Electrical Service

Type UF cable, Underground Feeder,  is approved for direct burial when installed according to applicable electrical codes.

  • The electrical service must be sized based upon several factors, including the size of the home, the connected load for large equipment, the required circuits, and all the connected electrical devices are also factored.
  • Once the size of the electrical panel has been established the type and size of the cable to feed power to the panel may be determined.
  • The size of the electrical service cables will depend on the over all length to the service, the type of cable that will be installed, and if the cable will be encased inside electrical conduit or direct burial.

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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all projects.


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