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TRUSTED BY ROCKVILLE, VA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon941
    Verified electrical services reviews

Find Electricians in Rockville

Avatar for J & M Electrical Services
J & M Electrical Services
4.9(
53
)
Electrical Wiring or Panel UpgradeElectric Vehicle Charging Station Installation - Materials Not ProvidedElectric Vehicle Charging Station Installation+10 more

Serving Rockville, VA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"James came out to price install of a box to plug in my portable generator. After we started talking and me asking questions James was able to give me an outstanding price on a whole house Generac generator with panel upgrade and included a whole house surge protector. They ran into additional costs with running the gas line but James kept to his word and honored the original price! The crew were professional and proficient in their work! Marcie was outstanding with communication and explaining any questions I had! I would definitely recommend this company and would use J&M for any future electrical needs!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

Response time1 day
Response rate100%
3 neighbors recently requested a quote
Avatar for Rodworks, LLC
Rodworks, LLC
5.0(
12
)
Electrical Switches, Outlets & Fixtures - Install or RepairElectric Vehicle Charging Station Installation - For Business - Materials Provided by ConsumerElectric Vehicle Charging Station Installation - Materials Not Provided+11 more

Serving Rockville, VA and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start, to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large, or small the job.

Response time4 hrs
3 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Virginia Power Solutions
Virginia Power Solutions
4.7(
78
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Rockville, VA and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"Excellent customer service after the sale. Electrical component failed on a Sunday morning, placed a service call and a real person answered. Received a return call from a technician quickly, 30 minutes later they were in our driveway. Diagnosed the problem, completed repairs, very friendly and smiling. Total time from making the call to repairs being completed less than 90 minutes. Thatâ s INCREDIBLE in todayâ s world."
Our Great Team!
Generator Service
Generator Sales
Generator Installs
Generac 26kW

+2

Response time1 day
89 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for W B Lightning Rods
W B Lightning Rods
4.6(
372
)
Lightning Protection - Install or Repair

Serving Rockville, VA and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"William and staff responded promptly to my request for service with reasonable pricing. They arrived at the house at the agreed upon time, were respectful of my property, explained the process and completed the work within the specified time frame. They were pleasant, easy to work with and installed a quality lightning rods system. I highly recommend them."
lightning protection
 Residential LPS
lightning protection
 Residential LPS
lightning protection

+79

Response time1 day
176 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Star Servco, Inc.
Star Servco, Inc.
4.4(
474
)
Electrical Switches, Outlets & Fixtures - Install or RepairElectrical Wiring or Panel UpgradeElectric Vehicle Charging Station Installation - Materials Not Provided+4 more

Serving Rockville, VA and surrounding areas

Approved

Super Service Award Winner

In business since 1976

Free estimates

Emergency services offered

"Called and was scheduled for the appointment 2 days later. They called before coming over and actually arrived faster than expected. He was able to determine what was wrong with the door bells and fixed them quickly. He said he would have to trouble shoot the light fixture but suggested changing all 3 of the light bulbs. Well, that was all that was needed. Color me embarrassed. He asked if there was anything else he should look at, which was very nice. We will call them for any future electrical needs."
Panel Replacement
Panel Installation After
Water Heater
Water Heater
Water Heater

+4

Response time1 day
373 neighbors recently requested a quote
Recommended by91%of homeowners
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Showing 1-10 of 230
Electrical questions, answered by experts

The total cost to install a 120V outlet will depend on the type of outlet you choose, labor costs, and any customizations. Standard 120 volt outlets usually cost $3 to $5 each. But say, for example, you customize your 120V outlets with USB ports, you’ll end up paying a bit more at $13 to $22 per outlet. When it’s all said and done, you can expect to pay around $175 for each new 120V outlet and $125 each for replacement.

When converting a standard 120-volt outlet to a 240-volt outlet, the only components you can typically reuse are the existing electrical box and the hole in the wall. Everything else—including the wiring, breaker, and receptacle—should be replaced to ensure both safety and efficiency. Appliances designed for 240 volts have different plug configurations that won’t fit into a standard 120-volt outlet, making it necessary to install a compatible 240-volt receptacle. This design helps prevent overloading or underloading the power available to any one outlet or circuit.

The life expectancy of a circuit breaker is 30 to 40 years. However, how long your circuit breaker lasts depends on the condition of your electrical equipment, the amperage, your electrical consumption, and more. A breaker box that frequently trips from overload will last much shorter than a breaker box with the proper amperage for the number of devices and appliances in use. If your circuit breaker trips frequently, and you have also increased your electrical consumption, it may be worth upgrading your electrical panel to extend your electrical system’s lifespan—and save you the hassle of frequent power trips.

Choosing between 12- or 14-gauge wire for your house depends on the electrical requirements of the circuit. A 12-gauge wire is thicker and can handle more power, making it better suited for devices such as kitchen appliances, air conditioning units, or electric heaters.

A 14-gauge wire is thinner and can handle less electrical current than a 12-gauge wire. It's ideal for circuits with lower power requirements, such as lighting or general-purpose outlets in bedrooms or living rooms.

If you need to run a wire from the meter to the breaker box, start by turning off the power using the main switch to avoid injury risks from live wires. Then, locate the ground wire from your meter and connect it to the ground bar of the breaker box. Connect the neutral wire using the same method to improve your circuit efficiency.

Next, locate the hot wires running from the main switch to the meter. To connect them to the correct terminals from meter to breaker, unscrew the nuts of the breaker hotwire terminals, insert the positive hotwire, and ensure it’s firmly attached. Finally, secure the wires with electrical tape and wire tie cables before re-securing your breaker box. Keep in mind that this process can be dangerous, so don’t hesitate to hire a local electrician.

The Rockville, VA homeowners’ guide to electrical services

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