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TRUSTED BY KNOXVILLE, MD HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon190
    Verified electrical services reviews

Top-Rated Electricians in Knoxville - Updated Nov 2026

Avatar for Mark H. Anderson Electrical Services, Inc.
Mark H. Anderson Electrical Services, Inc.
4.4(
418
)
Electrical Wiring or Panel UpgradeElectrical Wiring or Panel Upgrade - For BusinessElectrical for Addition or Remodel - Install - For Business

Serving Knoxville, MD and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"Lowest price among multiple quotes and significantly more attention to detail and the least visible and least intrusive installation of new wiring from the existing panel. Would definitely recommend and use Mark H. Anderson Electrical Services again!"
Best of 2015
Response time9 hrs
5 neighbors recently requested a quote
Recommended by94%of homeowners
Long Electric, LLC
4.9(
173
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Knoxville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: Quality work

"From start to finish, Long Electric had our backs. We didn't have to hire sub-contractors or to obtain permits -- Long Electric took care of everything. Our go-to person in the main office, Melissa, answered all of our questions and kept us apprised of everything we needed to know. Everyone we had contact with throughout the installation project treated us with the utmost in professionalism. Not only will I call upon them for future electrical needs, I have referred Long Electric to a friend who is also interested in a whole house generator."
Response time2 days
11 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Electrical Connections, LLC
Electrical Connections, LLC
4.3(
43
)
Electrical Wiring or Panel UpgradeElectrical Switches, Outlets & Fixtures - Install or RepairElectric Vehicle Charging Station Installation - Materials Not Provided+7 more

Serving Knoxville, MD and surrounding areas

Approved

In business since 1989

Emergency services offered

Warranties offered

"I had a wonderful experience with Electrical Connections. My project ended up being much larger than I anticipated it would be and they were excellent at explaining everything and helping me understand what needed to be done. Customer service was top notch and clearly a priority for everyone I talked to from the scheduler to the owner of the company. Brian was excellent and stayed until the job was done even though it made an extra long day for him. Highly recommended!"
Electrical connections
Electrical connections
Electrical connections
Electrical connections
Electrical connections

+42

Response time4 hrs
Response rate93%
11 neighbors recently requested a quote
Avatar for Lou Electrical Contracting, LLC
Lou Electrical Contracting, LLC
4.5(
36
)
Electrical Switches, Outlets & Fixtures - Install or RepairElectrical Wiring or Panel Upgrade

Serving Knoxville, MD and surrounding areas

Approved

In business since 2006

Free estimates

Offers commercial services

"We had five different things for Lou to fix, including a chandelier that needed to be lowered and made level. Lou rounded the oval links in the chain that held the chandelier and that made it level for the first time! He figured out why a ceiling fan was making noise and why another one wasn’t working at all. He also replaced part of our electric panel which had somehow gotten water inside and was corroded. We didn’t have the right part to change lights in our Faber stove hood, but Lou did, and quickly replaced them for us. We were really pleased with how knowledgeable and competent our electrician was and plan to call him again if we have any more electrical problems."
9 neighbors recently requested a quote
Recommended by81%of homeowners
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Showing 1-10 of 380
Electrical FAQs, answered by experts

It wouldn’t be abnormal to view all wiring as simply wiring, but wiring has different gauges and can handle different loads. When you’re wiring for 240V, you need wire that is rated at least 240V, but honestly it’s better to spend a little more and just buy 300V wiring. This ensures a margin of safety in case the wiring gets overloaded.

If you’re moving wires, installing new wires, or installing new fixtures in the space you’re insulating, then you will need to hire a licensed electrician to do that portion of the job for you. However, if you just intend on replacing old insulation or adding new insulation over existing insulation, then you don’t need to hire one. Your insulation installer will work around wiring, fixtures, outlets, and switches, even if they’re installing fiberglass batts in the voids where wires run. However, you will need an electrician if you suspect a problem with your wiring during the insulation work.

Yes, tamper-resistant outlets are designed to be safe for use in homes with children. They feature a spring-loaded shutter that blocks the electrical slots when not in use, which helps protect children from electric shock if they try to insert an object. While they are the safest option available and highly effective, it's important to note that few things are truly 'childproof.' Children may still try to imitate adults by inserting a plug. For this reason, it's best to use tamper-resistant outlets over less effective solutions like plastic covers, which can be removed or pose a choking hazard. Always supervise young children around any electrical outlets or devices.

If it’s called a USB outlet without any further designation, it likely refers to a USB-A port. These are the original USB connections and are commonly integrated within power outlets. In recent years, USB-A cables have slowly been usurped by faster and more reliable USB-C cables. USB-C connectors are small and ultra-thin with a reversible design, while USB-A connectors are slightly larger and bulkier.

While the line can't be removed, a pro can place a cap on the end to stop leaks. Contact a pro for a service call and speak with them about the related costs of either capping or removing the line altogether. Capping a gas line will cost between $75 and $150 while removing it will start at $250.

The Knoxville, MD homeowners’ guide to electrical services

From average costs to expert advice, get all the answers you need to get your job done.