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Types of Electricians

Electricians are specialized craftsman who install, replace, and maintain electrical equipment. Every type of licensed electrician requires training to take on various electrical jobs. Below you will find the four most common types of electricians.

 Residential Electricians

  • Residential electricians can install, replace, and repair electric systems in homes and apartment buildings (with single-phase electrical service). They also do electrical work outside of the surrounding areas. Their range of work can be a simple fix of an outlet or replacing lighting fixtures to rewiring a home or apartment building. Their expertise lies in these jobs, both large and small. Training combines classes, an apprenticeship which is usually four years under the supervision of extremely experienced electricians.

Commercial Electricians

  • Commercial electricians work on large commercial jobs and projects (with three-phase electrical service). They work in larger buildings with more complex and complicated projects. Not only do they install and maintain lighting and electrical services, they will also install workplace water heaters, commercial security systems, key entry facilities, fire alarms, and can even involve fixing heavy machinery. Before a commercial electrician is licensed, they must work under a master electrician for several years.

Journeyman Electricians

  • The majority of journeyman electricians work in construction, but they also work in other areas, such as large utility companies and manufacturing plants. They do not require as much supervision as residential and commercial electricians. They complete additional training courses and an exam. Once they have passed the exam, they don’t require extensive supervision. Journeyman electricians can work on both residential and commercial jobs. Typical work includes lighting system installation/repairs, security systems, and power supplies.

Master Electricians

  • Master electricians are highly skilled craftsman who have 7+ years of experience as an electrician. They generally work in a management or supervisory positions or own their own company. They also require additional ccourseworkand a master electrician exam. They are involved in overseeing their employees and projects to ensure they are done correctly. This could be the installation, repair, or maintenance portion of projects.

All electricians can do residential projects, but not commercial. Electricians typically start as residential electricians, then move into commercial because it’s more complicated. They may or may not become journeyman electricians and master electricians because this requires additional coursework, training and examinations.  Major benefits of moving up the electrician rank is higher pay and responsibility.

Electric Supply Center has all the materials every electrician needs for their jobs. With five locations across Massachusetts, feel free to stop by our counters or call today! If you have questions about which products each location carries, contact us.

To learn more about ESC or contact us, go to or click here to send an email.

Natalie Holtgrefe
Marketing Lead

REFERENCES (click below):
1) How to Become an Electrician in Massachusetts
2) Chart Link

Safety Tips Every Electrician Should Know

We know that you are concerned with safety – and so are we. Working with electrical equipment can be a dangerous task. There are many things that can be easily overlooked that may put you or those around you in danger. Here are some tips to keep you and those around you safe.

Safety Tips for All Electricians:

  • CLOTHING: Proper clothing is key to safety because it will protect your body. Remember to wear non-conductive gloves, boots with insulated soles, long pants and sleeves to protect your arms and legs.  
  • EYE PROTECTION: Protecting your eyes is extremely important. Particles could fly from walls, ceilings, and other places, so you should take preventative measures to make sure your eyes aren’t in harm’s way.
  • OUTLETS: Double checking outlets can ensure they are at the correct voltage before you begin work.
  • POWER SOURCES: Checking and securing overhead power sources when climbing on a ladder is very important. Stability is key. You should also remove equipment from power sources before fixing or replacing a part.
  • DANGERS: Consider all possible dangers before the job is started. Survey the job site, make sure you don’t see any dangers presenting themselves and fix any possible zones before they present danger to you, or others.
  • WATER: Do not put tools or equipment near a water source.

OSHA also provides a quick card for electrical safety on their website, which may be a good reference check anytime you’re working:

To learn more about ESC or contact us, go to or click here to send an email.


Natalie Holtgrefe
Marketing Lead

Boston Children’s Hospital Champions for Children’s Event

ESC was honored to be a part of the Boston Children’s Hospital Champions for Children’s event. Such an amazing night of support and inspiration raising more than $3.7million!

ESC Bolsters Management Team with series of Organizational Upgrades

Today, ESC has announced the promotion of three directors to vice president and the addition of a new executive vice president to its management team. The leading distributor of electrical supplies and fixtures welcomes executive vice president Doug Walo to oversee a team of vice presidents, Jim Crabtree, Bob Ryan, and John Murch, allowing the team to harness and expand the company’s significant growth.

“At ESC we recognize that while everyone has trucks and stock, we have our talented team to thank for our unmatched operational capability and booming sales,” said Larry LaFreniere, President at Electric Supply Center. “It gives me great pleasure to recognize Jim, Bob, and John’s impact on our success, bring Doug into the fold, and ultimately entrust this team of leaders to take ESC to the next level of supreme service.”

Doug Walo joins ESC as Executive Vice President with 31 years of industry experience. Walo will oversee the new management team while focusing on managing all sales and operational activities and working to develop and implement the company’s goals and growth strategies. Prior to joining ESC, Walo served as president of two west coast electrical distributors under the Sonepar Group.

Jim Crabtree, ESC’s new Vice President of Supply Chain, has accomplished much in his two years with the company. In his previous role as Director of Supply Chain, he successfully implemented distribution and vendor efficiency changes, expanded the company’s delivery fleet and number of orders delivered all while driving down operational cost.

Bob Ryan joined ESC in June 2013 and will now serve as Vice President of Sales and Marketing. During his time with ESC, he has created numerous marketing strategies and incentives, dramatically increasing his team’s work stock sales. Bob was also instrumental in the opening of ESC’s Mansfield office and Woburn branch.

John Murch brings decades of experience at ESC to his new role as Vice President of Projects. Having started as a part-time employee at 16 working in the lighting showroom, Murch joined ESC full-time in 1997 and has since ascended the ranks from behind the counter, to branch manager, to switchgear specialist. In his most recent role as Director of Projects, Murch oversaw the award and execution of some of Boston’s most complex projects, building a team of highly-respected industry veterans all the while.

The creation of this executive team will allow each vice president to dedicate increased focus to their segment, as Walo executes overarching growth strategies and enhances existing ones with an eye to penetrate new segments and open additional branches. This move represents a monumental step forward in ESC’s commitment to bring its unparalleled service to a wider audience of customers.


ESC Supports the 2017 Veterans Count Golf Tournament

3rd Annual Veterans Count Lakes Region Golf Tournament


The Lakes Region Chapter of the Veterans Count teamed up with Laconia Country Club in Laconia, NH for the 3rd Annual Veterans Count Lakes Region Golf Tournament. Taking place on Monday, July 17th, this year’s tournament hosted about 100 golfers and raised more than $82,000, which brings the 3 year tournament total to almost $250,000.

Every year the tournament supports Veterans Count, a program of Easterseals NH whose mission is to provide emergency financial assistance to veterans, service members and their families when no other resource is available to ensure their dignity, health and over all well-being. The Lakes Region Chapter was started in 2014 by a dedicated group of Veterans Count volunteers who have hosted the golf tournament each year.

Electric Supply Center (ESC) was one of the many groups providing financial support for Veterans Count. “It is important that we never take for granted all of the sacrifices our veterans, service members and their families, make each and every day,” stated ESC President, Larry LaFreniere. “It was an honor to once again be a part of such a great event that really brings attention to veterans and their needs.”


ESC Woburn 6am Opening!

Starting September 1st,

ESC Woburn will be opening

Monday – Friday at 6am!!!!

**Also open every Saturday from 7am – Noon**

Brian from ESC Woburn is clearly excited about this!

ESC was proud to support the Eversource walk for Boston Children’s Hospital!

ESC was proud to participate and raise over $23K for the Eversource walk for Boston Children’s Hospital! Thank you to all who helped us in our efforts and be sure to check out this great video BCH made to recap the day!

ESC IDEAL National Championship Qualifications

Have you earned your tickets to ESC Night at the Lowell Spinners game on August 10th? If you have, make sure you stop by the IDEAL booth for your chance to Qualify for the IDEAL National Championship!

Help Team ESC support the 2017 Eversource Walk for Boston Children’s Hospital

Good afternoon,

US News has ranked Boston Children’s Hospital #1 for 2016, and while this is a great honor for the hospital, this awesome ranking is not enough for Children’s to continue to positively affect so many lives. Children’s needs our support as they forge ahead, investing in research and brand new facilities. The children who rely on BCH haven’t even experienced a fraction of life yet, with their good days being so different than good days we experience. While it is uplifting to see children at BCH with smiles, energy, and great enthusiasm, it is also sad to acknowledge the challenges they face. Your contribution will change the trajectory for so many kids…It will change their story.

Last year, ESC not only represented with a team, but also had a booth along the route so that we were able to meet with every walker along the way. With hospital staff, leadership, corporate partners and patient families all in attendance, the energy that this event exudes is beyond inspiring. The event will be held Sunday, June 11th at the Hatch Shell in Boston and is Boston Children’s Hospital’s largest fundraising initiative with a BBQ, live entertainment and a wide variety of family-friendly activities on-site.

Many of us including ESC employees, Vendors, Customers, families and friends pulled together to support the 2016 Eversource Walk for Boston Children’s Hospital by collectively raising over $7,000. This year, I encourage more partners to participate and help us reach a goal of $10,000. I’d like to invite you and your family to join us for this special day. Please consider getting involved.

To join Team ESC, visit and click “Join our Team” to register.

Thank you in advance for your participation and support. I look forward to walking with you on June 11th!


Larry LaFreniere

Choosing a Carbon Monoxide/Smoke Detector for Your Home

no fire sign

Installing and maintaining a smoke and carbon monoxide detector is one of the best and least expensive ways that you can protect yourself and loved ones from danger. When you don’t correctly maintain your detector, you’re at risk for home fires and carbon monoxide poisoning, which can both be deadly. BRK offers a hardwired photoelectric/CO combination alarm for your home. As a new construction requirement for Massachusetts, this alarm comes with voice alerts.

Features of Smoke/CO Alarm

  • Photoelectric sensors are able to detect and identify various types of fire hazards in your home
  • Mounting bracket allows for easy installation and maintenance for alarm
  • Voice alarm allows up to 11 programmable locations
  • Varying and lower horn tones allows elderly with normal age related hearing loss to still hear the alarm
  • Alarm latch remembers which unit started the alarm
  • Low battery latch identifies which unit has a low battery

Regardless which type of alarm or brand you choose to protect your home, it’s important to remember to have one! It’s better to be over prepared with a dual-sensor alarm than not prepared at all. Learn more about the combo smoke and carbon monoxide alarm from BRK by contacting ESC at 781-272-7700.