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Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Electrical Contractors Rated Highest in Quality and Helpful Expertise®?

This Diamond Certified electrician is hanging a new chandelier in a home entryway. You'll feel confident choosing a quality electrical contractor listed above because each has been rated Highest in Quality and Helpful Expertise® and has earned Diamond Certified. For more information on how best to choose and work with electricians in Alameda County, read the following articles. Photo: Gentec Services, Inc. ©2012 Topic: Finding High Quality Electrical Company in Alameda County

OAKLAND — You are the customer. If your goal is to choose an electrical contractor that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified electrician. Each has been rated Highest in Quality and Helpful Expertise® in the most accurate ratings process anywhere. And you’re always backed by the Diamond Certified Performance Guarantee. Here’s why the Diamond Certified ratings and certification process will help you find a top rated electrician and is unparalleled in its accuracy, rigor and usefulness:

1) Accuracy: All research is performed by live telephone interviews that verify only real customers are surveyed, so you’ll never be fooled by fake reviews.

2) Statistical Reliability: A large random sample of past customers is surveyed on an ongoing basis so the research results you see truly reflect a Diamond Certified company’s top rated status.

3) Full Disclosure: By clicking the name of a company above you’ll see the exact rating results in charts and read verbatim survey responses as well as researched articles on each qualified company.

4) Guaranteed: Your purchase is backed up with mediation and the Diamond Certified Performance Guarantee, so you can choose with confidence.

Click on the name of a Diamond Certified company above to read ratings results, researched articles and verbatim customer survey responses to help you make an informed decision.

More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality and Helpful Expertise®–a 90+ on a 100 scale–as well as pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified Resource eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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Dan Pitcock is a lifetime veteran of the electrical industry and president of Roberts Electric Company, Inc., a Diamond Certified company since 2002. He can be reached at (510) 621-3918 or by email.

Dan Pitcock

diamond certified contributor profile and expert article

Dan Pitcock: High Voltage

By James Florence, Diamond Certified Resource Reporter

OAKLAND – Dan Pitcock has been involved in the electrical industry since he was a young man, but there was a span of time during and after college when he had another equally electrifying occupation. “I worked for Bill Graham Presents from the mid ’70s to the early ’80s as a security supervisor at concerts,” he says. “I’m a pretty big guy, so they put me at the front of the stage, which gave me the opportunity to see a lot of iconic bands perform during their heyday. I remember working a Rolling Stones show where Mick Jagger was trying to untie some balloons and asked me if I had a knife. About 20 knives came flying out of the crowd and landed on the stage. He cut the balloons off and everybody cheered as they flew up over the crowd. Another time, I got a Dutch rub from Steven Tyler!”

Long before he was supplying the muscle at rock ‘n’ roll shows, Dan was fully immersed in electrical work. As he describes, it was merely a family affair. “I come from a family of electricians, including my father and my uncles. My parents started Roberts Electric Company in 1960, and I basically grew up in the business. By the time I was 12, I was working during the summers for my parents, and I continued to do that through college. In 1992, I took over the business.” In addition to building on the traditions of quality and service that have characterized Roberts Electric Company since its inception, Dan has put his own spin on things by expanding the business to handle larger commercial and industrial jobs.

While Dan’s role as owner of Roberts Electric Company keeps him busy throughout the workweek, on weekends he’s likely to be on the sidelines at one of his son’s soccer games. “My son, Shane, plays on Bay Oaks, which is a Class 1 team in the Bay Area that competes nationally,” he explains. Dan has been participating in local youth sports ever since Shane, now a high school senior, first got involved with them as a boy. “I coached little league for many years, and I’m on the Board of Directors for a couple youth baseball organizations.” Dan says being a part of his son’s athletic career has been a continual source of enjoyment and paternal bonding. “It’s been something that we’ve been able to share for a number of years, and it’s been a great joy. Shane wants to play soccer in college, so I look forward to supporting him in that as well.”

Looking back on his life and career, Dan takes pride in knowing he’s made a positive impact on his local community. “I’ve always enjoyed helping people and improving their lives through electricity, so it’s very gratifying to know that I’ve been able to make a difference,” he says. When asked what he’d do if he could retire tomorrow, Dan says he’d spend some time traveling abroad. “I used to speak Spanish and French pretty fluently, so I’d like to visit those countries and get re-immersed in that. I’d also like to get outdoors more and enjoy things like bird watching and hiking.”

Ask Me Anything!

Q: What’s your favorite sports team?
A: Even though I grew up in Oakland, I’ve always been a Giants and 49ers guy. And, of course, I have to support my Cal Bears.

Q: What kind of music do you listen to?
A: I like a mix of old school and new school. Lately, I’ve been listening to a lot of newer stuff like Arcade Fire and Band of Horses, but I also like Led Zeppelin and the classic rock I grew up with. I’m just a child of the ’70s who has lived through all these different phases and learned to appreciate newer styles. I’ve even warmed up a bit to the rap music my son listens to!

Q: If you could time travel, would you go to the past or the future?
A: I’d go to the past, because I’d like to see the Bay Area before it became settled and populated. When the first Spanish explorers came through here, they described all kinds of amazing things—whales beached on the Bay, grizzly bears, and huge amounts of birds and fish.

Q: What kind of books do you read?
A: I’ve always enjoyed sci-fi and fantasy books—I used to read the Lord of the Rings trilogy every year—but lately, I’ve been reading historical accounts of life in the United States.

Q: What’s your favorite snack?
A: I’m a big taco truck guy. Oakland has some great taco trucks, so when I’m in the mood, I enjoy a good local taco.

Q: What’s your favorite smell?
A: Organic roses. The ones that aren’t hybridized have a really amazing perfume.

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Understanding Your Electrical System


OAKLAND — There are two types of electrical systems found in homes today: fuse boxes and circuit breaker panels. Regardless of which you have in your home, it’s beneficial to gain an understanding of how each functions. Fuse box As… Read more

Updating Your Interior Lighting


OAKLAND — If you’re looking to update the lighting in your home, there are several available options, but the best lighting is always that which most improves your home’s functionality and energy-efficiency. When it comes to choosing a light bulb,… Read more

Expert Video Tip

Video: Understanding Your Electrical System

Complete Video Transcription:

OAKLAND — Host, Sarah Rutan: Whether a fuse box or circuit breaker, it’s helpful to have a basic understanding of your home’s electrical system. Today we’re… Read more

Scott Mamola is a 23-year veteran of the electrical industry and owner of Maine Electric, Inc, a Diamond Certified company since 2006. He can be reached at (925) 231-0744 or by email.

Scott Mamola

diamond certified contributor profile and expert article

Scott Mamola: A Spark of Interest

By James Florence, Diamond Certified Resource Reporter

LIVERMORE — Scott Mamola may have begun his professional life as a construction hand, but it wasn’t long before a related trade sparked his interest. “After working for a while as a laborer, I started to notice the electricians on the jobsites,” he recounts. “They didn’t look quite as beat up as us laborers, and their work seemed a little more technical. Plus, from what I gathered, they made better money. All things considered, I decided it would be a good trade to get involved in.” After earning his electrical certification in trade school, Scott gained industry experience working for a couple of electrical contractors before obtaining his contractor’s license and starting his own business.

Today, as owner of Maine Electric, Inc, Scott says his favorite part of his job is cultivating his team. “I enjoy introducing new employees to our culture, watching them grow and seeing the successes they get in our company. It always makes me happy when a recently hired employee reports back to me that they feel at home here.”

Born in San Jose, Scott resides today in Tracy with his wife and three children. When asked what he enjoys about living and working in the Bay Area, he cites the abundance of professional opportunity. “I appreciate the fact that there’s a lot of opportunity in our field. Even though the economy can be up and down at times, there are always people willing to pay for great service, which has kept us in business all these years.”

Outside of work, Scott likes spending as much time as possible outdoors. “I’m not one for sitting around the house, so I like to get away on the weekends,” he says. “Our family does a lot of boating at local lakes, and in the summer we usually rent a houseboat or stay at a cabin. I’m also a diehard water fowler and enjoy going hunting with my sons.” Additionally, Scott enjoys attending his children’s sporting events. “My daughter is involved in competitive cheerleading, and both of my sons are into sports like basketball, football, and wrestling.”

In his life and career, Scott espouses the importance of having good intentions. “In every situation I encounter, I always try to do the right thing,” he explains. “Even if what I thought was a good decision ends up being a bad one, I know at least I had the right intention, and that goes a long way in life and business.”

When asked the first thing he’d do if he were to retire tomorrow, Scott says he’d acquire a more itinerant mode of living. “I would like to stay in a different climate every three months and constantly change up my scenery, as well as expose my kids to new places and points of interest. What can I say…I guess I just have a hard time sitting still!”

Ask Me Anything!

Q: Coffee or tea?
A: Coffee.

Q: Are you a dog person or a cat person?
A: A dog person—I have a black lab.

Q: What’s your favorite local restaurant?
A: Tracy Thai Restaurant in Tracy.

Q: Music or talk radio?
A: I really like talk radio, especially NPR and all the stories they have. When I’m listening to that, a three-hour drive can feel like 20 minutes.

Q: What was your favorite toy as a child?
A: My Green Machine, which was basically a combination of a bike and a big wheel.

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Identifying Hazardous Electrical Panels


LIVERMORE — If you live in an older home and have never looked at your electrical panel, it’s time you did. Why? There’s a chance your entire electrical system is relying on a defective product. Despite advances in circuit breaker technology,… Read more

Addressing Electrical Problems


LIVERMORE — During the summer and winter, the need for cooling and heating your home requires larger amounts of power to be drawn through your electrical system. If you experience electrical problems like tripping circuit breakers or flickering lights, these problems will… Read more

Expert Video Tip

Video: Identifying Hazardous Electrical Panels

Complete Video Transcription:

LIVERMORE — Host, Sarah Rutan: You may not realize it, but your home’s electrical system could be relying on a defective product. To learn more, we’re in… Read more




  • Lutron

  • Leviton

  • B-K Lighting

  • Eaton

  • Juno

  • Rejuvenation

  • Ruud

  • Elco

  • Cree

  • Murray

Halo Electrical Equipment
Lutron Lighting Systems
Vantage Controls
Leviton Electrical Equipment
RTI (Remote Technologies, Inc.)
RAB Lighting
Cooper Lighting
Lumiere Electrical Equipment
Juno Lighting
Square D Electrical Products
Raco Electrical Equipment
General Electric (GE)
Philips Electrical Products
Sanyo Electrical Products
Sony Electrical Products
Eaton Electrical Equipment
Hunter Lighting
JVC Electrical Equipment
LG Electrical Equipment

electrical design
electrical / mechanical services
electrical estimating
electrical grounding
domestic electrical service
commercial electrical upgrade
electrical inspections
electrical repairs
electric installations
home wiring upgrades
electrical testing services
electrical safety inspections
low voltage installation
high voltage electricians
24 hour emergency electrical services
appliance installation
lighting design
indoor / outdoor lighting
electrical help
electrical cabling

Castro Valley
Komandorski Village
Mount Eden
Russell City
San Leandro
San Lorenzo
Union City


Following consumer agencies and trade associations have additional information about choosing, hiring and dealing with local electrical contractors.

National Electrical Contractors Association (NECA) (www.necanet.org)
Independent Electrical Contractors (IEC) (www.ieci.org)
Western Electrical Contractors Association (WECA) (www.weca-iec.org)
International Association of Electrical Inspectors (IAEI) (www.iaei.org)
National Electrical Contractors Association Northern California Chapter (www.norcalneca.org)

Know What You Want
Know What You Want from Alameda County Electricians

When beginning your search for a good electrician, start by asking yourself a few basic questions about the work you need done and the type of contractor you want to hire. Write down your answers as having specific goals can help you present a coordinated case to the companies you interview. Here are some sample questions to get you started:

  1. Do I want a Diamond Certified electrical contractor that is top rated and backed by the Diamond Certified Performance Guarantee?
  2. What services do I need (electrical repairs, home rewiring, commercial electrician services, new construction electrical work)?
  3. What is my budget for my home electrical installation and electrical repairs?
  4. Are there any job specifics that I or the contractors will need to take into account when planning the electrical repairs or service? (i.e. old wiring, the location of the wires to be replaced or repaired, etc.)
  5. What professional qualities and characteristics do I want in a Alameda County electrician? These may include timeliness, cleanliness, good communication skills, knowledge base, experience, and follow-up service.)
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What To Ask In Person
In-Person Interview Questions to Ask Electricians in Alameda County

Use these questions to get you started as you interview local electricians in Alameda County or your area.

  1. How long will these electrical services take?
  2. Will I be able to stay in my home during the rewiring or electrical repair services? Or will the electricity be shut off for too long for me to remain comfortably in my home?
  3. Have you completed similar electrical work in my area of Alameda County?
  4. Do you have a list of recent customer references that I can call?
  5. How do you finish your electrical installations and repairs? Is it possible for you to return my home to the condition it was in before you did the work, or will I need to hire another contractor to repair walls, paint or other areas?
  6. How should I handle future electrical service issues? Will you be responsible for warranty work if there’s ever a problem with my new electrical wiring and fixtures?
  7. Is there anything I can do to make the electrical repairs and installation process go smoother?
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  • What To Ask References
    Gain Insight from Alameda County Electrical Contractors’ References

    It’s best to choose a Diamond Certified electric contractor because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from an electrician in Alameda County and the Greater Bay Area, you can have confidence choosing a Diamond Certified company. Diamond Certified reports are available online for all certified companies. And you’ll never be fooled by fake reviews. That’s because all research is performed in live telephone interviews of actual customers.

    If you can’t find a Diamond Certified electrician within reach, you’ll have to do some research on your own. If you do, it’s wise to call some references provided by your contractor. Keep in mind, though, that references provided to you by electricians are not equal in value to the large random sample of customers surveyed during the Diamond Certified ratings process.

    That’s because references given to customers from companies are cherry-picked instead of randomly selected from all their customers. So the contractors will likely give you a few customers to call that they know are satisfied.
    If you do call references on your own, specifically ask for a list of the company’s 10 most recent customers in Oakland, Fremont, Dublin, Livermore, Berkeley, Alameda, Pleasanton, Hayward or your area. This will help avoid them giving you the names of only customers they know were satisfied.

    1. Were you satisfied with the service from (electrical company name)?
    2. What was the type and scope of job the local electricians did for you (emergency electrical repairs, electrical rewiring, lighting installation, fuse replacement, electrical panel service, etc.)?
    3. Were they prompt and personable?
    4. Did the electrician explain to you the status of the work?
    5. Did they complete the electrical repairs or installation work on time?
    6. Were there unexpected costs? If so, what were they for and were they avoidable?
    7. Did the electricians charge extra to travel to your home if you live in a smaller Alameda County town such as Castro Valley, Piedmont, Komandorski Village, Mount Eden, Pleasanton or in the rural Tri-Valley Area?
    8. Did the electrical contractors clean up after finishing the job?
    9. Would you recommend their services to friends or family?
    10. When you need electrical service in the future, will you hire this company again?
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  • Review Your Options
    Hire Good Electricians in Alameda County

    The Diamond Certified symbol has been awarded to companies that scored Highest in Quality in an accurate ratings process.

    There are many good electrical contractors in Alameda County, including those that serve customers in the major cities of Oakland, Berkeley, Fremont, Hayward and San Leandro.

    Hiring a professional electrician who does quality work and has experience in the services you need can mean a better chance of getting the results you desire. So before deciding on the best electrical contractor for you, consider the following questions:

    1. Is there an electrical contracting company on your list that can meet your needs for electric services, supplies and materials, brands and installation or repair requirements?
    2. Are the Alameda County electricians knowledgeable about the repairs and new electrical wiring you need? Can they easily explain to you which products and brands best fit your needs?
    3. Is the contractor sensitive to your budget? Can they give you varying bids that address your resources?
    4. Do the electricians guarantee their work and offer warranties on their products?
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  • How To Work With
    Before You Hire A Good Electrician in Alameda County

    Some individuals like to establish a relationship with their electrician by hiring them for smaller projects before calling them for emergencies and large electrical installation projects. But just like homeowners can be choosy about with whom they do business, many contractors are interested in providing services to those who are reliable, fair and honest. Bids can be expensive to prepare and no contractor wants to waste time bidding a job that homeowners aren’t serious about finishing.

    How can you be the kind of homeowner that the best electricians want to work with? See the tips below.

    • Prove your interest in good value, not just the lowest bid. Many people start their discussion with contractors by asking simply about price, not value. You can show your interest in quality by asking questions about products, repair methods, installation techniques, warranties and lasting value rather than simply price.
    • Be upfront with the contractors that you’re interviewing if you’re accepting multiple bids. But only shop among carefully-selected companies that offer quality work and don’t accept more than three bids.
    • Tell your contractor exactly what you want done and every specific direction or request you have. This will allow them to give you the most accurate bid possible and gives them insight into exactly what you want from your contractors. If they can’t provide what you need or want, it’s better to find out before you’ve wasted your time and theirs.
    • Interview and choose among local electricians in Alameda County. Most electricians prefer to work within a smaller radius, as this allows them to provide faster service and reliable emergency repairs.

    Now That You’ve Found Your Alameda County Electrical Contractor
    Now that you’ve found the electrician that best suits your needs, you can move forward and sign a contract. Good contracts should include details about the scope of the electrical work, any materials and products to be used, payment terms, the expected timeline for the job and any warranties and guarantees that will cover the work.

    Your electrician should provide the contract to you and allow you to read through it and ask any questions you may have before signing the contract. This agreement protects you, your property and the contractor, so it’s important that you understand all terms and exclusions and that you never sign an incomplete or blank estimate or contract.

    If there are items you verbally agreed upon with your electrical contractor, you may write in those terms. These may include specific expectations and instructions, expected start and end dates, clauses that stipulate when the work must be completed, and any bonuses or offers you wish to extend for early completion of the work.

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  • Be a Good Customer
    How to Help Your Electrical Work Go Smoother

    There are a few things you can do before your electrician arrives and while they’re working in your home or business in order to help the work move along more smoothly.

    • Have a list of specific repairs or electrical installation work you need done, and write down any questions or concerns. This will ensure you get the service and answers you need and can possibly cut down on the length of time the job takes, reducing billable hours.
    • Clear unnecessary items from the area where the contractor will be working. For example, if your electrician will be repairing or installing a new electrical panel, make sure he or she has easy access to the existing panel by moving furniture or other objects that are in the way. This will cut down on the amount of time your contractor has to spend clearing the area in which they’re working.
    • Keep pets and children out of the area while the work is ongoing. For larger projects that take more than one day, such as house rewiring, your electrician may have to leave wires exposed or walls opened. In this case, keep family members and pets out of the room until the work is completed. Talk with your electrical contractor about the duration of the job and his or her preferences.
    • Ask your electrician company representative what you can do to help speed the job along or make the work easier. There may be simple steps you can take to increase the contractors’ efficiency, thereby cutting down on the amount of time spent and the overall cost of the job.

    How Can You Be a Good Electric Contractor Customer?

    It’s the electrician’s responsibility put in quality wiring and electrical fixtures using the best possible installation techniques. But you play a big part in the success of your electric services, too. Here are a few simple steps you can take to be a good customer when hiring a Alameda County electrical company.

    • Be clear and upfront with the contractor. Let them know what you want from your electrical work, the long-term outcome you’re expecting and specific ways they can satisfy your expectations.
    • Remember, a friendly smile and good attitude goes a long way.
    • Before you hire a contractor, restate your expectations and goals, and reiterate to the company representative your understanding of the agreement. Most problems with local electrical contractors occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.
    • Ask your electric contractor if you should call to check on the progress or if he will call you with updates.
    • Be sure your service representative has a phone number where they can reach you at all times. The electrical work will move along more smoothly if the electricians can reach you for with updates, questions and authorizations.
    • When your electrician contractor contacts you, return calls promptly to keep the job on schedule.
    • Pay for the electrical work promptly.

    Why would you want to be a good customer? Electricians appreciate customers who are straightforward, honest and easy to work with. Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship.

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Check The Work
Check all Electrical Repairs and Installations Against the Invoice

When your electrical services are complete, ask your electrician to give you an invoice and walk you through the work before they leave your home or business. An invoice usually includes the following:

  • The electrical contractor’s name, business address and license number.
  • An itemized list of all electrical work performed.
  • A complete list of all electrical supplies used, including new parts and replacement parts.
  • The total cost of the job, broken down into amounts due for electrical parts, wiring and for labor.
  • Any applicable guarantees and warrantees provided by the electrical equipment manufacturers and the installers.

Use the information on the invoice to compare against the work that was actually completed. If items don’t match up or you have questions about what was done, ask your electrician before they leave the property. During your walk-through, ask about any special instructions for operating or maintaining your new electrical installations.

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Written Warranties
Get Written Warranties for All Electrical Repairs and Electrical Installation Services

Most electrical contractors guarantee their work. If your electrician offers warranties on his or her services and products, they should be willing to give you a written warranty as proof of their promise to back up their installations and repairs.

Complete written warranties for electrical services in Alameda County and beyond include the following:

  • The electrician’s name, business address and state license number.
  • Details about what electrical products and work are covered and how the contractor will deal with warranty claims (full refunds, replacement or repair of faulty wiring, etc.).
  • Expectations for customer responsibility when filing a warranty claim (i.e., paying a prorated amount, paying for labor costs, covering the cost of new materials and fixtures, etc.).
  • The exact terms and limitations of the warranty, including if it’s transferable to the new owner if you sell your home.
  • All exclusions to the guarantees must be in writing and presented at the same time as the warranties.
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Top 10 Requests
Top Service Requests for Electrical Contractors in Alameda County

There are many electrical services required of electricians in Alameda County, including in the major cities of Oakland, Dublin, Fremont, Newark, Hayward, Pleasanton, Berkeley, Alameda, Union City, San Leandro and Alameda. The following are the most common electrical repairs and installations.

Electrical Wiring/Rewiring
Electrical wiring is a system of insulated wires that carry electricity from the electrical source to outlets and fixtures in homes and buildings. Sometimes referred to as building wiring, electrical wiring and rewiring services.

Electrical Supplies
Electrical supplies include wires, cables, circuit breakers, switches, light fixtures, electrical boxes, tools and other supplies needed to install and repair residential electrical systems.

Outlet Wiring
Wiring for new outlets and outlet wiring replacement is very common. Many homeowners believe they can install new outlets, test for outlet wiring problems or install switch boxes, but even these minor electrical repairs are best left to professionals. Outlet wiring is a fairly simple procedure that will take most electrical contractors just a short time. However, outlets that are wired incorrectly can cause electrical shocks and even fires, so it’s imperative that you hire a good electrician to do your electrical work.

Install Ceiling Fans
Ceiling fans can reduce your heating and cooling bills and keep your house more comfortable year round. Ceiling fan installation is a common procedure that can be quick or require rewiring, depending on the desired location. Before calling a Alameda County electrician to install your new ceiling fan, know where you’d like the fan located and whether you want a ceiling fan with a light. You may even want to purchase a new ceiling fan for installation.

Residential Electrical/Home Wiring
Most residential electrical wiring and new home wiring projects require strict adherence to local codes. Your electrician will most likely need to pull a permit for wiring due to the potentially dangerous nature of the work, so make sure you consult your contractor. New home wiring can be done to replace old wiring, faulty wiring or frayed wiring. It can also be installed as home wiring upgrades.

New Construction Electrical Services
New construction electrical services are those wiring and electrical system installation services for new buildings, including new homes, commercial buildings and industrial facilities. These wiring services are provided while the buildings are still in frame-up stages rather than after the walls have been put up.

Home Wiring Repair
Frayed wiring, faulty wiring and old home wiring may need to be repaired. When wiring replacement or rewiring isn’t required, a simple home wiring repair may be possible. Your Alameda County electrical contractor will repair existing wiring to make it safer and more reliable.

Electrical Maintenance
Electrical maintenance is the term for all steps taken to maintain, preserve and upkeep electrical equipment and systems. Many homeowners, business owners and industrial facility managers rely on electrical maintenance contractors. Electrical maintenance is common for power outlets, electrical generators, surge protectors, lighting replacement, electrical energy savings upgrades, electrical inspections, electrical assessments and preventative maintenance for electrical systems

Electrical Inspection
All new electrical installations and many electrical repairs are required to pass an electrical inspection. Most residential electrical permits require three inspections. One during the early stages, one mid-way through the work and a final inspection. Your electrical contractor may be responsible for calling for inspections, so verify with them who will take on this aspect of your home electrical installation project. This inspection verifies that all work is done correctly, safely and according to local electrical codes in Alameda County.

Electrical Repair
Common electrical repairs in Alameda County include wall switch troubleshooting, electrical rewiring and electrical wiring repair, circuit breaker troubleshooting, ceiling light fixture repair / replacement and electrical outlet repair. Safe and legal electrical repairs must be done by a licensed, insured electrical contractor who is in good standing with the state.

Top 10 Brand Requests

  1. GE Electrical
  2. Sylvania
  3. Hubbell Electrical
  4. Lithonia
  5. Leviton
  6. Lutron
  7. Kichler
  8. Crestron
  9. Lightolier
  10. Raco
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Glossary Of Terms
Glossary of Electrical Terms

accent lighting
Accent lighting is a decorative lighting source that provides variable degrees of light and may distribute light in multiple directions to emphasize décor or home and yard features. Common accent lighting methods include recessed lighting, track lighting and wall-mounted picture lighting.

Also known as: visual interest lighting, interior lighting, highlight lighting, track lighting, recessed lighting, uplighting, downlighting, wall-mounted lighting, specialty lighting

alternating current
An electric current that changes direction with regular frequency is known as alternating current, or AC power. Most home and business power is in the form of ac or alternating current.

Also known as: AC, ac

The unit that measures the rate of flow of electric current.

The use of one Ampere for one hour.

The standard unit for measuring heat energy. One BTU is the amount of energy necessary to raise the temperature of one pound of water one degree Fahrenheit.
Also known as: British Thermal Unit

commercial lighting
Commercial lighting services include repair, installation and rewiring for commercial buildings. Commercial accent lighting, ceiling lighting, wall lights, outdoor lighting and emergency lighting are common types of commercial lighting.

Also known as: business lighting, restaurant lighting, store lighting, commercial building lighting

compact fluorescent light bulbs
A type of fluorescent light bulb suited for use in homes and businesses. CFLs are known as energy efficient bulbs that fit into most existing light fixtures created for traditional incandescent light bulbs.

Also known as: CFL, CFLs, compact fluorescent lamps, compact fluorescents, Energy Star light bulbs, energy efficient light bulbs, low-energy light bulbs, fluorescent lighting, energy saving light, compact fluorescent tube, compact fluorescent light, compact fluorescent lights

direct current
Direct current is an electric charge that flows in one direction only.

Also known as: DC, dc

fluorescent lamps
Fluorescent bulbs produce light by passing electricity through a gas, usually mercury vapor, which causes the gas to glow and produce ultraviolet light. Fluorescent lamps produce less heat than incandescent lamps and are more energy efficient. Fluorescent tube lamps have long been used in homes and businesses. Compact fluorescent light bulbs are becoming more common and replacing incandescent light bulbs in homes and commercial uses.

Also known as: fluorescent light bulb, fluorescent tubes, fluorescent bulbs, compact fluorescent lamps, CFL, CFLs

An electrical generator converts mechanical energy into electrical energy. Generators are typically used as secondary and emergency power sources in the event of power failures.

Also known as: electrical generators, power generators, emergency power supplies, emergency power supply

ground wire
A conducting connection between electrical circuits/equipment and the ground, or to some conducting material or surface that takes the place of the ground. Ground wires can be intentional or accidental. Intentional ground wires may be set in order to prevent contact with dangerous voltage and to keep static electricity from building.

Also known as: grounded wire, grounding wire

high voltage
An electrical system or electric cable that operates between 46 kilovolts and 230 kilovolts.

Also known as: high voltage system, high voltage cable, high voltage wire, high voltage electrical system

incandescent light bulbs
Incandescent light bulbs produce light by heating a metal filament wire, which glows brightly when it becomes hot. The hot filament wire is encapsulated within a glass bulb filled with gas. Incandescent bulbs were the most common light bulbs used in homes and businesses, but are being replaced with more energy-efficient CFL bulbs.

Also known as: incandescent bulbs, incandescent light bulbs, incandescent lamps, incandescent light globe

An inverter is a device designed to convert direct current into alternating current of any required voltage and frequency. Inverters are commonly used to take power from fuel cells, solar panels and batteries and turn it into usable AC electricity for homes and businesses.

Also known as: electrical inverters, inverter, power inverter, DC-to-AC inverter, modified sine wave inverters, pure sine wave inverters

A unit of electricity that equals 1,000 volts.

Also known as: kV, KV

A kilowatt equals 1,000 watts.

Also known as: kW

kilowatt hour
The term kilowatt hour refers to the amount of energy equal to the use of one thousand watts for one hour. Kilowatt hours are the most common billing unit for home electric usage

Also known as: kilowatt-hour, kWh, kW-h, kWh, kwh

low voltage
An electrical system that provides power to electronic devices that operate on a voltage level lower than the standard 110 volts. Low voltage devices include doorbells, low-voltage lighting and thermostats.

Also known as: low-electric devices

National Electrical Code
Guidelines for safeguarding people and property from potential electrical hazards. Electricians who comply with the National Electrical Code can install electrical systems that are essentially free from hazards. The N was first instituted in 1897 and is regularly updated.

Also known as: NEC

photovoltaic system
Photovoltaic systems, including solar panels and converters are used to turn sunlight into energy that can be used in homes and businesses.

Also known as: PV systems, PV, solar energy systems, solar electricity, solar power

residential electrical systems
Residential electrical systems found in single-family homes, town houses, small apartment buildings and other residential structures.

Also known as: home electricity, residential electricity, residential electric services

ultra high voltage
Electric systems in which the voltage exceeds 800,000 volts.

Also known as: UFV

A unit of electrical force.
Also known as: V, voltage

A watt is a measurement of power that is equal to one joule per second. Watts are broken into submultiples and multiples, including fetowatt, picowatt, nanowatt, microwatt, nilliwatt, kilowatt, megawatt, gigawatt, terawatt and petawatt.

Also known as: W

The power of one watt operating for one hour.


A network of wire, conductors and devices that conduct electricity throughout a building or home to provide electricity.

Also known as: home wiring, electrical wiring, residential wiring, electric wiring, commercial wiring, house wires, electrical wires, rewiring, building wiring

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Frequently Asked Questions
Frequently Asked Questions for Good Electricians

Q: Why choose a Diamond Certified electrician?
A: Diamond Certified helps you choose an electrical contractor with confidence by offering a list of top rated local companies that have passed the country’s most in-depth rating process. Only contractors rated Highest in Quality and Helpful Expertise® earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with ongoing research and ratings. And your purchase is backed by the Diamond Certified Performance Guarantee, so you’ll feel confident choosing a Diamond Certified company.

Q: Can I do home electrical work myself?
A: Any kind of home improvement project poses risks to homeowners who are trying to do it themselves. But none carry such a great risk as electrical work. Inexperienced people should never try to install electrical wiring or repair electric systems. Instead, all work should be performed by a licensed, experienced electrical contractor. That’s because professional electricians are trained in safety and code requirements, they’re better equipped with the correct tools and materials to complete the job, and they have the skills and experience to complete the job efficiently.

Q: When should I call an electrician about maintaining or upgrading my home’s electrical system? 
A: It might be time to call a local electrical contractor if you frequently blow circuits or fuses, your lights dim when you turn on your air conditioner or other appliances, your lights flicker or go off and on, you smell electrical burning/wires or fuses smell hot, you use multi-plug power strips because you don’t have enough outlets, you use two-pronged adapters with three-pronged plugs or you often use extension cords.

Q: What do electrical repairs and installation cost?
A: Some contractors give hourly rates or per-project costs over the phone, but many decline to give estimates over the phone without seeing the project first. That’s because many jobs aren’t as simple as they may appear and homeowners may not be able to accurately describe the problem over the phone. Good electricians often want to see the electrical system themselves before they go on record with a price, because they don’t want to give inaccurate estimates.

Q: What should I do if my power goes out?
A: If the power is out throughout your home, check with a neighbor to see if they have power. If they are experiencing a power outage, call your utility company to report the problem. If the power outage seems to be affecting only you, call your electric company and ask them to send a representative to check your power supply. If you still are experiencing a problem, if the power company is unwilling or unable to send a representative, or the power is only out in one area of your home, call a local electrician to investigate the cause.

Q: Does all home electrical work require a permit?
A: General residential electrical services don’t usually require a permit, but large projects such as additions, basement and attic finishing and garage conversions may require permits and inspections. If you fail to get proper permits and the work doesn’t meet electrical and building codes, you could be required to redo the work at additional expense.

Q: Will I be without power while my electrician is working?
A: Depending on the job you’re having done, your contractor may not have to turn off the power to your entire home. In some cases, they’re able to cut off single circuits for a short time. Larger projects and repairs may require a total shut-off, but most good electricians minimize the amount of time they leave their customers without power.

Q: Can I plug a four-prong appliance into a three-prong outlet?
A: New appliances are designed to meet the newest standards, so older appliances may not always fit new wiring and new appliances may not fit newer electrical wiring systems. Your electrical contractor can replace a new four-prong cord with a three-prong cord in existing installations. Talk with a local electrician about your specific needs.

Q: Why are some of my outlets or lights working while others are not?
A: There are several possible reasons for this, and only a licensed electrician can diagnose your specific problem. It may be that some of the outlets and/or lights are on a circuit that doesn’t work or is failing while other lights and outlets are on a working circuit. In this case, repairing the circuit can fix the problem. Another possibility is that the outlet or light switch has worn out and simply needs to be replaced. Electrical breakers also may have been tripped, and resetting the breakers may fix the lights and outlets. In any case, it’s best to call a local electrical contractor to diagnose and repair the problem.

Q: My light fixtures are flickering, what should I do?
A: Flickering lights can be a symptom of several problems. It could signal a loose connection in a circuit or a problem with the general electric supply. It’s best not to use the lights that are flickering (or any lights in your home or office if all of the lights are flickering) and call a licensed electrician to diagnose the problem immediately.

Q: What causes residential lights to dim?
A: Dimming lights are caused by several problems, which can only be accurately diagnosed and repaired by licensed electric contractors. If all of your lights dim, the problem may be at the local utility, the transformer or the service feed. Call your utility to check this first. If your lights dim when an appliance such as an air conditioner or refrigerator is turned on, the lights may be on the same circuit as the appliance and not receiving enough electricity when the appliance turns on.

This can be repaired by putting appliances that draw a lot of electricity on a dedicated circuit. Dimming lights may also be a sign that your home wiring is too small or your power source isn’t strong enough.

If your lights alternately dim and brighten, it could indicate a serious problem such as broken, loose or corroded wires. If this is the case, call an electrician right away to check your home wiring.

Q: How can I lower my electric bill?
A: The easiest way to save money on your electric bill is to monitor how often you use your heater, air conditioner, hot water heater and washer and dryer. These appliances use the most electricity and minimizing their use can greatly reduce your electric bill. Installing a programmable thermostat can help regulate your home’s temperature and cut down on wasted heating and cooling costs. Turning down your hot water heater or adding a programmable thermostat to it can help minimize hot water waste. And replacing old and broken appliances with higher efficiency appliances can save money every day. Talk with your electrician contractors for money-saving ideas that are specifically tailored to your home and energy usage.

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