Cost to Install an Electrical Subpanel
An electrical subpanel adds a secondary distribution panel by mounting an enclosure, running feeder cable from the main panel, and installing breakers for new circuits. Homeowners commonly plan this work when adding circuits or accommodating intended load, but feeder connections inside the main panel make it a hard electrical job.
Common reasons homeowners do this job
- Adding new circuits served from the subpanel
- Accommodating the intended electrical load
- Upgrading electrical distribution for a home project
- Replacing worn or damaged electrical distribution equipment
DIY or call a pro?
A licensed electrician should install an electrical subpanel. Work inside the main electrical panel carries a risk of severe electrical shock or electrocution, and improper wiring or loose connections can cause a fire. The work requires specialized training, including verifying that power is off with a voltage tester before any terminals are touched.
Frequently asked questions
- Is an electrical subpanel a DIY project or one to hire out?
- This is a job for a licensed electrician. It involves installing a feeder breaker and connecting feeder wires inside the main service panel, where there is a serious shock, electrocution, and fire risk.
- What makes electrical subpanel installation more expensive?
- The price can rise with the size of the job, labor time, and the materials needed, including the load center, feeder cable, feeder breaker, circuit breakers, grounding bar, and mounting supplies. Removing old material can add haul-away or disposal work, while a small installation may still involve a minimum or trip charge.
- What should be checked before selecting a subpanel and feeder cable?
- Determine the amperage needed for the intended load and measure the distance from the main panel to the subpanel location, since distance affects the required wire gauge. The enclosure and circuit breakers also need to be compatible.
- Why are loose connections in a subpanel a serious concern?
- Improper wiring or loose connections can create a fire risk. A licensed electrician uses the required tools, including insulated screwdrivers, a torque wrench, and a voltage tester, while making and checking the panel connections.
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