Diamond Certified Companies are Rated Highest in Quality and Helpful Expertise.

  • Why this rating is the most accurate.
  • Our editors gather deep company info.
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Diamond certified companies are top rated and guaranteed

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

You are the customer. If your goal is to choose a commercial electrical contractor that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified commercial 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 commercial 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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DIAMOND CERTIFIED EXPERT CONTRIBUTORS IN THE Alameda County – Electrical Contractors, Commercial CATEGORY

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




  • Lutron

  • Leviton

  • B-K Lighting

  • Eaton

  • Juno

  • Rejuvenation

  • Ruud

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


The following agencies and associations are those that deal with licensing, regulating and giving information to and about commercial electrical contractors. They may be able to provide more information about commercial electricians in your area to supplement the helpful articles above.

It may also be true that commercial electrical services affiliated with some of the agencies below may be able to offer better services. Being licensed by or a member of local and national commercial contracting associations may show that a contractor has a deeper commitment to providing quality work and continually increasing their knowledge about the newest advances in and best practices for commercial electrical services.

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 (NCNECA) (www.norcalneca.org)
California Department of Industrial Relations (CDIR) (http://www.dir.ca.gov/)
Contractors State License Board (CSLB) (http://www.cslb.ca.gov/)
Federated Electrical Contractors (FEC) (http://www.fec.org/)

Know What You Want
Discover What You Need From Alameda County Commercial Electrical Contractors

Start your search by outlining your needs. Think about the specifics of your building and business, the current electrical system and lighting, complaints or problems you’ve had with the existing system, and the commercial electrical services you need. You should also consider what you expect professionally and personally from the Alameda County commercial electricians you hire in Oakland, Dublin, Fremont, Newark and Hayward and beyond.

Start by asking yourself the following questions and any others that pertain to your situation, and writing down the answers so you can keep a record of your exact needs, expectations and desires.

  • Do I want a Diamond Certified commercial electrical contracting company that is top rated and backed by the Diamond Certified Performance Guarantee?
  • What commercial electrical services do I need (electrical system repairs, new construction electrical installation for a commercial building, store rewiring, public building lighting, commercial building power system upgrades, etc.)?
  • What is my budget for my commercial electrical installation or repairs?
  • Are there any items that need to be considered when planning the electrical repairs or service? (These may include business or store operating hours, notifying tenants, set timeline for repairs, specialty licenses, code violation repairs, etc).
  • What qualities do I want in Alameda County commercial electricians? Personal and professional characteristics you may be looking for might include experience, timeliness, cleanliness, good communication skills, knowledge, experience, and follow-up service).
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What To Ask In Person
Interviewing Commercial Electrical Contractors in Person

After your phone interviews are completed, read over the notes you took. Think about the first impression the local commercial electrical companies left you with. You should easily be able to narrow down your list of potential contractors.

The next step is to invite a few of the stand-out commercial electricians in Alameda County to come to your location to provide an estimate for the commercial electrical repairs or installation you need, whether your business is in a larger locale such as Pleasanton, Berkeley, Union City, San Leandro and Alameda, or Livermore, Piedmont, Russell City, Emeryville, Cherryland, Sunol and the Tri-Valley, or another area.

This will give you a chance to show your commercial space to the electricians you are considering, and it will let them see the scope of work and the existing materials.

As with the telephone interviews you conducted, you’ll want to have a written list of questions that you pose to each commercial electrical company, and you’ll want to write down the answers you get so you can compare them.

The list of questions below are some you can use to augment your own questions.

  • What commercial electrical services would you suggest for my office?
  • How long will the commercial electrical services I need take to complete?
  • Will I be able to stay in this building during the rewiring/installation/repairs? Or will the electricity be shut off for too long to enable our employees to keep working or our customers to continue shopping?
  • Can you provide off-hours commercial electrical repairs so that the work won’t impact my business, employees or customers?
  • Have you completed similar commercial electrical work in my area of Alameda County?
  • Do you have a list of recent customer references that I can call?
  • How do you finish commercial electrical installations and repairs? Will you return my commercial building to the condition it was in before you did the work, or will I need to hire another contractor to repair walls, paint or provide other services?
  • Will you help us set up an electrical maintenance and assessment schedule so that our building continues to comply with local codes and safety standards for commercial buildings?
  • Will you be responsible for providing warranty work if there’s ever a problem with my new commercial electrical wiring and/or fixtures?
  • Is there anything I can do to make the commercial electrical repairs and installation process go smoother?
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  • What To Ask References
    Learn From References of Commercial Electricians

    It’s best to choose a Diamond Certified commercial electrician because all certified companies have passed an in-depth ratings process that most other companies can’t pass. If you want quality from a commercial electricians 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, including commercial electricians in San Leandro, Berkeley, Hayward, Alameda, Fremont and Oakland, and beyond. 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 commercial electricians 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 commercial electrical companies.

    Remember, though, references provided to you by the commercial electricians are never 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 commercial electrical contractors you contact will likely give you the names of a few references that they know are satisfied.

    If you do call references on your own, specifically ask for a list of the commercial electrical company’s 10 most recent customers. This will help avoid them giving you the names of only customers they know were satisfied.

    Questions you can ask of local commercial electrical services in Alameda County include:

    • Were you satisfied with the service from_(Alameda County commercial electrical company name)_?
    • What was the type and scope of job they did for you (emergency electrical repairs in your commercial building, electrical rewiring for your store or shopping center, indoor or outdoor lighting installation, fuse replacement, electrical panel service, etc.)?
    • Were they prompt and personable?
    • Did the commercial electrician explain the status of the work while he was working on your office or commercial building?
    • Did this commercial electrical firm complete the electrical repairs or installation on time?
    • Did the commercial electrical repairs or commercial electrical installation costs match the estimate you were given?
    • Were there unexpected costs? If so, were they avoidable?
    • Did the commercial electricians charge extra to travel to your business or office if it is located in Russell City, Komandorski Village, Cherryland, Albany, Castro Valley and Sunol, or a rural area?
    • Did the commercial electrical contractors clean up after finishing the work?
    • Would you recommend this commercial electrical service to friends or family?
    • When you need electrical service in the future, will you hire this company again?
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  • Review Your Options
    Find Good Commercial Electricians

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

    Before deciding on the best commercial electricians in Alameda County for you, take a moment to review your interview notes and consider the following questions.

    It may be helpful to review your notes from the interviews you performed and review any written materials or estimates you were given by the commercial electricians in Oakland, Fremont, Hayward, Berkeley, San Leandro, Alameda, Union City, Pleasanton, Newark and Dublin and the rest of Alameda County.

    • Is there a commercial electrical contracting company on your list that can meet your needs for commercial electric services, commercial-scale electrical supplies and materials, brands and installation or repair requirements?
    • Are the Alameda County commercial electricians you’ve spoken with knowledgeable about the repairs and new electrical wiring you need? Have they explained to you which products and brands best fit the needs of your store, shopping center, public building or commercial site?
    • Are the local commercial electrical contractors you’ve interviewed sensitive to your budget? Can they give you bids with options that fit your resources?
    • Do the electricians guarantee their work and offer warranties on their products?
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  • How To Work With
    Get the Best Commercial Electrical Services

    There many good commercial electricians that operate in and around Alameda County, including those that serve commercial customers in Pleasanton, Berkeley, Union City, San Leandro and Alameda, and other areas.

    You may be surprised to learn that contractors can be just as discerning about with whom they work as can business owners. That’s because bids take time and can be expensive to prepare, so commercial electricians may only choose to provide bids to and work with commercial building managers and business owners who are serious about hiring quality commercial electrical contractors, not just those who offer cheap electrical services for businesses.

    The following tips are just a few that help you be the kind of customer that Alameda County commercial electrical services want to work for.

    • Look for commercial electricians that provide good value and quality electrical services for commercial buildings, not just contractors that offer the lowest bid. Show your interest in quality commercial electrical services by asking questions about products, repair methods, installation techniques, warranties and lasting value rather than simply price.
    • Tell the commercial electrical contractors exactly what you want done and any special requests that you have. This will give them insight into exactly what you want, and it will enable them to give you more accurate bids. It’s also smart to be upfront about your needs and expectations so that you can find out right away if the Alameda County commercial electricians you’re interviewing can’t can’t provide what you need or want.
    • Interview local commercial electricians in Alameda County or your area. Most good commercial electrical companies like to work within an area that’s close to their home base, as this may allow them to be able to provide faster service and more reliable emergency repairs to their customers. (Be wary of electricians who travel across state lines or long distances to provide commercial electrical services. This is sometimes a clue that they will only provide initial installation services and may not be willing or able to provide repairs, warranty work or follow-up services).
    • Be upfront with the commercial electrical contractors if you’re accepting multiple bids. But protect yourself and your interests by only shopping among licensed and insured companies that offer quality work and aim for three to five bids. Giving low-performing or unlicensed operators a chance to bid for your job or accepting too many bids can keep good companies from being interested in bidding for the work because they may feel they can’t compete on an uneven playing field).

    Enter Into A Contract with Your Chosen Alameda County Commercial Electrical Service
    Once you’ve chosen a local commercial electrician, you’ll want to ask for a detailed estimate. Once that meets your approval, you should request a contract. Complete contracts for commercial electrical services will include the total price for labor and materials, the start date, the expected end date, and any special requests or requirements from you and your contractor.

    Warranties on the materials and any guarantees provided by your contractor should also be included in the written contract.

    Read through the estimate and contract to be sure you understand all terms as they are presented. Clear up any questions and add any remarks or requirements of your own before you sign the contract.

    For your own protection, never sign an incomplete or blank estimate or one that includes items with which you don’t agree or don’t understand.

    How to Help Your Commercial Electrical Work Go Smoother
    There are a few things you can do before the commercial electricians arrive and while they’re working in your business in order to help the work move along more smoothly. You may find that this can help the work go faster, and it may even save you money by eliminating costly or time-consuming work stoppages or distractions.

    Make a list of specific repairs or electrical installation work you need done, and write down any questions or concerns you want to address with the commercial electricians you’ve hired. This will ensure you get the service and answers you need and may cut down the length of time the job takes, reducing billable hours.

    Clear unnecessary items from the area in which the commercial electrical contractor will be working. For example, if your electrician will be repairing or installing a new electrical panel in your office, 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.

    Find out if you need to provide special parking space for oversized work vehicles or storage room for electrical supplies while the work is in progress.

    Have your office, store, shopping center or commercial building prepared for construction dust and debris if you’re having major commercial electrical work done. Dust, debris and other construction remnants can be tracked from the area under renovation into other space. If your commercial electrician will have to drill into walls or ceilings, open walls or ceilings or perform repairs or installation that can generate dust or debris, ask about having the electrical company or a third party put up barriers to keep out contaminants.

    Keep employees and customers out of the area while the work is ongoing. For projects that take more than one day, such as office rewiring or work station electrical upgrades, your electrician may have to leave wires exposed or walls opened. Talk with your Alameda County commercial electrical contractor about the duration of the job and his or her preferences; you may need to cordon off areas to keep out customers or employees for safety’s sake.

    Ask your commercial electrical company representative what you can do to help speed the job along. 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.

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  • Be a Good Customer
    How Can You Be a Good Commercial Electrical Services Customer?

    It’s your commercial electrician’s responsibility to install quality electrical materials using the best possible installation techniques for commercial and public buildings. But you play a big part in the success of your commercial electricians, too.

    You should start by performing license and insurance checks on the Alameda County commercial electricians in Oakland, Dublin, Fremont, Newark and Hayward or your area. Next, you’ll want to interview representatives of the commercial electrical services, and invite them to bid on the work you need done. Once you find the company that best suits your needs and sign a contract, you become partners in the work.

    Here are a few simple steps you can take to be a good customer when hiring Alameda County commercial electrical companies.

    • Be clear and upfront with the commercial electricians. Let them know what you want from your commercial electricians, the long-term outcome you’re expecting and specific ways they can satisfy your expectations.
    • Remember, a friendly smile goes a long way in gaining trust and maintaining a good working relationship, especially when there are conflicts or disagreements.
    • Before you hire a commercial electricians in Alameda County, restate your expectations and goals, and reiterate to the commercial electrician your understanding of the agreement. Most problems with local commercial electrical services occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.
    • Ask your commercial electrical company 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 while they’re repairing, installing or upgrading your business electrical system. The work will move along more smoothly if your commercial electricians can reach you for any necessary updates, questions or work authorizations.
    • When your contractor contacts you, return calls promptly to keep the commercial electrical work on schedule.
    • Pay for the commercial electrical services promptly.

    Why would you want to be a good customer? Commercial electricians in Alameda County appreciate customers who are straightforward, honest and easy to work with. Good customers can help make the process easy, and are often a pleasure to do work for.
    Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship with your commercial electrical contractor. The electrical repairs or electrical system installation may very well go more easily and any problems may be more quickly resolved.

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Check The Work
Look Over the Completed Commercial Electrical Services

Ask the commercial electrician who worked on your project to walk you through the completed work. Ask them to show you the items on the invoice, point-by-point. Now is the time to ask about any discrepancies or questions you have about the information on the invoice or the work itself.

Ensure that the commercial electrical service you hired gives you a written invoice. For your protection, a complete invoice should include the following items:

  • The Alameda County commercial electrical company’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, separated into amounts due for electrical parts, lighting, wiring and for labor.
  • Any guarantees or warranties offered by the electrical equipment manufacturers and the installers.
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Written Warranties
Protect Your Business Investment With Written Guarantees

Warranties protect you, your business and your commercial electrician by stating exactly which products and services are under warranty and what will be done and by whom to remedy the problem in the event of a product or installation failure.

Warranties or guarantees may be offered by the product manufacturer or by the commercial electrician who installs the products, and sometimes products and services are guaranteed by both parties.

For your protection, you should have your Alameda County commercial electrical contractor explain to you the warranties on each product and service they provide, and outline who is responsible for any required warranty work. You may also want to get clarification on any maintenance, inspections or responsibilities you are required to provide in order to keep those guarantees valid. Likewise, you should know who to contact and what steps to take in the event of a product or installation failure.

This may be especially important if your commercial building is located in Piedmont, Dublin, Mount Eden, San Lorenzo and Ashland, or a more rural area in which it may be harder to get follow-up service.

As with any contract document, you should ask for all warranties in writing so that you have proof of warranty and written documentation of the responsible party if you need to redeem your warranty for any reason.

Complete written warranties include:

  • The name of your Alameda County commercial electrical company, the business address and the contractors’ state license number.
  • Details about which electrical products and work are covered and how the commercial electrical contractor will deal with warranty claims (full refund, product replacement or repair of faulty wiring, etc.).
  • Your responsibility when filing warranty claims (i.e., whether you have to pay a prorated amount, cover the cost of labor, pay for new materials or fixtures, etc.).
  • The exact terms and limitations of the warranty.
  • Whether the warranty is transferable.
  • 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
Popular Service Requests for Alameda County Commercial Electrical Contractors

Commercial electrical installers in Alameda County, including those that serve business clients in  Dublin, Newark, Pleasanton, Union City and Alameda, and your area, are usually able to tailor their services to meet their customers’ needs. However, some commercial electrical services are more common than others.

The following services are those that commercial electricians in Alameda County and the Greater Bay Area provide with regularity.

Commercial Electrical Upgrades
Commercial electrical upgrades include new electrical panels, upgraded electrical wiring for businesses and stores, upgrades and installation of additional power outlets for employee work stations. Commercial electrical upgrades may also include additional lighting and electrical displays for storefronts and shopping centers.

Commercial Electrical System Design
Electrical buildings require different electrical system designs than do residential areas and industrial electrical systems. That’s because commercial buildings have different electrical needs depending on whether they host office employees, shoppers, the public, or other individuals, and if those people are working, shopping, using computers, there for entertainment reasons, or have other needs. Some Alameda County commercial electricians specialize in designing commercial electrical systems that meet the needs of various commercial buildings and their employees and patrons.

High Voltage Electrical Services
Most residential electricians aren’t experienced or skilled in dealing with high voltage electrical systems. However, commercial electrical services in Alameda County may be able to do so, as commercial buildings and public buildings are more likely to have high voltage electrical systems. These are also be common in industrial buildings, and are installed and repaired by commercial and industrial electricians.

Commercial Electrical Safety Inspections
Building codes are different for residential and commercial buildings, and many commercial buildings have routine electrical safety inspections. These can be performed to ensure the commercial electrical system is in good working order, to delay major repairs by performing regular maintenance, to pass local operating regulations, and to protect employees and customers.

24-Hour Emergency Electrical Services
Alameda County commercial electricians often provide 24-hour emergency electrical services for businesses and commercial buildings. These can include commercial wiring repairs, commercial or shopping center power outage repairs, and other public building electric repairs after-hours.

Lighting Design for Commercial Buildings and Office Buildings
Office buildings and commercial spaces require unique lighting depending on whether the building is an office or work space, a store, a mixed-use building, public building or has another use. Some local commercial electrical services in Alameda County, including those in San Leandro, Berkeley, Hayward, Alameda, Fremont and Oakland, and beyond, can provide lighting design for commercial spaces and office buildings so that the lighting sources match the need of the occupants.

Electrical Repairs
Electrical repairs for commercial buildings in Alameda County include wiring repair, commercial lighting repair, commercial electrical panel repairs, electric infrastructure repair, main electric line repair and replacement, outlet repairs and electric switch repairs.

Low Voltage Lighting Installation and Repair
Commercial buildings often incorporate low voltage lighting, both indoor and outdoor. Some Alameda County commercial electrical contractors can install and repair low voltage lighting such as ceiling lights, outdoor and landscape lighting, accent lighting and low voltage work lighting.

Workplace Lighting
Office workplaces require different lighting than do shopping centers, mixed-use buildings, storefronts and industrial buildings. Alameda County commercial electricians can install lighting—including workstation lighting, direct lighting, accent lighting, lighting dimmer switches, aim-able lights and programmable lighting—that helps make employees more productive.

Commercial Electrical Wiring Upgrades
Whether you are upgrading your entire commercial office space or simply want to upgrade dated or underperforming wiring, chances are good that a good commercial electrician in Alameda County can provide the services you need. Commercial electrical wiring upgrades may include the installation of new wiring systems, the addition of more electrical wiring, new electrical panels, adding more power outlets or upgrading the amount of power available.

Popular Brands Used By Commercial Electrical Companies in Alameda County
Good commercial electricians in Alameda County use a wide variety of materials from a number of name-brand electronics manufacturers. Some of the most common brands chosen are listed below. However, your commercial electrical contractor should be able to tell you which brands he or she recommends for your specific building and need.

  • Pioneer Commercial Electrical Equipment
  • Philips
  • Square D
  • Halo Commercial Electrical Installations
  • Lutron Commercial Electric Systems
  • Sanyo
  • Vantage Controls
  • Panasonic
  • Leviton Commercial Lighting
  • Sony Commercial Electrical Materials
  • Eaton
  • JVC Commercial
  • RAB Commercial Lighting
  • Cooper Commercial Lighting
  • Kichler Commercial Electrical Equipment
  • Raco Commercial Electrical Equipment
  • GE / General Electric Commercial Electrical Wiring and Lighting
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Glossary Of Terms
Glossary of Terms Used By Local Commercial Electrical Companies

The terms and definitions below are some used by local commercial electrical contractors and commercial electricians. They pertain to services and products delivered by commercial and industrial electricians, as well as some general electrical terms that all business owners should be familiar with.

Of course, this list will not include all terms or definitions you may want to know regarding commercial electrical work. As with any construction project, ask your commercial electrical services for clarification if there are any terms, materials, line item entries or other information you don’t understand about your project.

As the customer, it is your right to completely understand the commercial electrical repairs, installations or services your office or commercial building needs.

accent lighting
Accent lighting is decorative lighting that provides variable degrees of brightness and may distribute light in multiple directions to emphasize building aspects or illuminate dark areas of offices and commercial buildings. Common accent lighting methods include recessed lighting, track lighting and other aimed accent lighting  sources that can be changed to suit employee or customer needs.

Also known as: interior lighting, highlight lighting, uplighting, downlighting, wall-mounted lighting, specialty lighting

alternating current
Alternating current changes direction with regular frequency is known as alternating current, or AC power. Most industrial lighting, commercial lighting and business power is in the form of AC or alternating current.

Also known as: AC, ac

A term used to describe the reduction in power or voltage when the demand for electricity exceeds the amount of electricity available or being generated. Brownouts are usually minor reductions in power that customers and employees don’t notice; however, some brownouts may affect sensitive electronics.

Blackouts are caused by a lack of power, usually when demand exceeds available power to the point where the power is completely sapped. Blackouts, including rolling blackouts, may occur in summer when temperatures are high and the power drain on the power grid is too high for the electrical system to sustain power.

Also known as: rolling blackout, power loss, power outage, power blackout

building wire
Cables, wires and conductors used in commercial building construction to provide electrical power to the entire building.

Also known as: commercial electrical wiring, commercial electrical system installation

circuit breaker
Circuit breakers are panels built into offices and public buildings that allow for the opening and closing of a circuit. These may be used to turn off sections of power or turn on areas that have been overloaded and tripped by too-high energy usage.

commercial lighting
Commercial lighting services include repair, installation and rewiring for commercial buildings such as businesses, industrial buildings, restaurants, stores, public buildings, schools and other business buildings. Commercial lighting may be present inside the building (in the form of ceiling lights, work lights, office space lighting, decorative lighting, storefront lighting and display lighting) and outside the building (outdoor lighting, walkway lighting, decorative landscape lighting, and parking lot lighting).

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

compact fluorescent light bulbs
A type of fluorescent light bulb used in commercial buildings, industrial buildings and businesses. CFLs are energy efficient bulbs that fit most existing light fixtures created for traditional incandescent light bulbs. Commercial buildings, stores, businesses and office buildings often make the transition to compact fluorescent light bulbs in order to lower lighting costs.

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 lights

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

Also known as: DC, dc

electrical generators
Electrical generators convert mechanical energy into electrical energy. Electrical generators are typically used as secondary power supplies and emergency power sources in the event of power failures. Some businesses and public buildings have secondary power in the form of electrical generators to allow employees to keep working and public use of their building in the event of an power outage.

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

high-tech troubleshooting
Problem-solving and troubleshooting services to find and identify problems within a commercial electrical system.

industrial electricians
Industrial electricians serve non-residential buildings such as factories, power plants, chemical plants, production facilities, mines and manufacturing facilities. They are usually skilled with high voltage power systems, machinery repair, circuits and electrical instrumentation, along with electrical wiring, electrical installation and repairs for industrial buildings.

Also known as: industrial electrical contractors

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 businesses, schools, stores and public buildings.

Also known as: electrical inverters, inverter, power 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

A unit of electrical force.

Also known as: V, voltage

A watt is a measurement of power 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

Power equal to one watt operating for one hour.

A network of wire, conductors and devices that conduct electricity throughout buildings, schools, public offices and stores.

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 Commercial Electrical Contractors

The following questions are commonly asked of and about commercial electricians in the Greater Bay Area.

Q: Why hire Diamond Certified commercial electricians?
A: Diamond Certified helps you choose local commercial electricians with confidence by offering a list of top rated local commercial electrical contractors that have passed the country’s most in-depth rating process. Only commercial electricians 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 commercial electrical service.

Q: How is commercial electrical work different than residential electrical services?
A: Commercial electricians provide electrical installations, repairs and monitoring in commercial locations such as stores, offices, public buildings, schools and other non-residential settings. Commercial electricians can provide lighting, new power outlets, upgrades for commercial electrical systems and other wiring and electrical work in commercial settings.

Q: Can any electrician provide industrial or commercial electrical work?
A: Commercial electricians and industrial electricians are trained differently than those who work in residential environments. Likewise, electric codes are different for commercial spaces. Some local electricians may be able to provide all types of electrical repairs and installations, but you’ll want to verify that your local electrical repair service has experience and skill working with the type of commercial or industrial electrical work you need done. It would be wise to call some references who had similar work done to find out how the company performed and whether they have a record of providing the services you need.

Q: What is an industrial electrician?
A: Like commercial electricians, industrial electricians serve non-residential buildings. Industrial electrical services provide wiring, electrical installation and repairs for factories, power plants, chemical plants, mines, production facilities, high voltage machinery systems and in other industrial work areas. Some industrial electrical contractors work with high voltage power systems. While commercial electricians provide general power services and lighting installation, industrial electricians often work with motors, circuits and electrical instruments.

Q: Can commercial electricians provide lighting design and installation for my shopping center or office building?
A: Lighting for offices, shopping centers, stores, mixed-use buildings and other non-residential spaces needs to be designed around the intended use of the building. For example, work spaces and offices need balanced overall lighting as well as focused task lighting for desks and work areas, and shopping centers and stores need decorative lighting and accent lighting that draws the consumers’ eyes to the merchandise. Many commercial electricians are able to provide lighting design and special lighting installations that complement the work space or shopping space. If lighting design is a service you need, ask the commercial electricians you’re interviewing if commercial lighting design is a service they can provide. You may also want to ask for the contact information for a few references who have had the commercial electrical installers provide for them commercial lighting design services so you can get a third-party account of the contractors’ abilities in that area.

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