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TRUSTED BY ROCKVILLE, VA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon940
    Verified electrical services reviews

Find Electricians in Rockville

Avatar for J & M Electrical Services
J & M Electrical Services
4.9(
53
)
Electric Vehicle Charging Station Installation - Materials Not ProvidedElectrical Wiring or Panel UpgradeElectric 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%
2 neighbors recently requested a quote
Avatar for Tolliver Electrical LLC
Tolliver Electrical LLC
5.0(
22
)
Electrical Wiring or Panel UpgradeElectrical for Home Addition or Remodel - Install

Serving Rockville, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Offers commercial services

"Tolliver Electrical did a commercial job for me at Fleetpride. (a heavy duty truck parts store) The company did an excellent job in completing the electrical work before the staff reported back to work the following morning. Tolliver Electrical is the only electrical company that I call on for all my electrical needs"
Panel change
Chandelier
Living room
Lights
Response time2 days
Response rate91%
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
1 neighbors recently requested a quote
Recommended by100%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

"WB Lightning Rods did an excellent job installing lightening rods on our home. The owner stayed onsite the entire time to supervise the work. He took extra care to plan the rod and cable placement to ensure the proper protection and retain the aesthetics of our home. His crew were knowledgeable, polite, neat and efficient. We could not be more pleased with the results."
lightning protection
 Residential LPS
lightning protection
 Residential LPS
lightning protection

+79

Response time1 day
173 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 RepairCeiling Fan - InstallElectrical Wiring or Panel Upgrade+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
399 neighbors recently requested a quote
Recommended by91%of homeowners
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Electrical questions, answered by experts

Many wire nuts can accommodate three wires of various gauges; you should check the packaging of the nut to confirm you are buying the correct size. In addition, there are screw terminals that accommodate various numbers of wires; these might also be called “terminal blocks,” and exist to connect multiple wires. 

The key difference between a circuit breaker versus a surge protector is that circuit breakers shield your entire electrical system from overcurrents and faults, while surge protectors defend your electronic devices against voltage surges and spikes. A circuit breaker interrupts the flow of electricity in a circuit when it detects an overload or short circuit, protecting the wiring from damage and preventing fires. In contrast, a surge protector shields electronic devices from voltage spikes, such as those caused by lightning strikes or power surges, preventing damage to the device’s inner mechanics.

Amps describe the amount of energy that can flow through a circuit breaker. Every electrical device that’s attached to the breaker requires about 1.5 amps. While that equates to roughly 13 receptacles per 20 amps, using slightly fewer ensures that your circuit will always have enough energy for sudden power surges instead of tripping when one occurs. In general, 10 to 12 receptacles is recommended for a 20 amp circuit.

Black is the standard color for hot wires, which transfer electricity to your outlets and switches. Red wires are also hot wires. White (and sometimes gray) wires are considered neutral, delivering power back to the panel. Finally, green wires, which are sometimes bare copper, are ground wires, used to ground an electrical circuit and prevent electrocution.

Yes—if a breaker is old or damaged, it might not be able to detect power surges or electrical overload. If that happens, the breaker won’t trip. Instead, it will begin to overheat, putting your electrical system at risk of fire or total electrical failure. Circuit breakers don’t last forever, so you can proactively replace old or damaged breakers before they stop working.

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.