Differences Between Residential and Commercial Electric Wiring

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Residential and commercial electric wiring are vastly different, right from the quality and grade of material used, to load and energy requirements as well as the installation process. Since there are many factors that go into designing and installing an electrical system, it is important that you hire the right electrical contractor for the job.

Here is an overview of the 3 main differences between commercial and residential wiring below for your understanding.

Residential Wiring

  • Insulation – Completely covered with sheath insulation to protect wiring as well as residents from electrical shock.
  • Location – Usually hidden from view within wall interiors, rafters and attic crawl spaces in your home.
  • Load – Uses a single phase circuit of 120 volts with the exception of appliances such as air conditioning units, refrigerators, washers and dryers which use a 2-phase circuit of 240 volts.

Commercial Wiring

  • Insulation – Has a higher level of insulation which is thermoplastic, high-heat resistant, nylon coated (THHN) for protection from corrosive substances.
  • Location – Typically run through tube-like conduits which provide protection from damage but are easily accessible for servicing.
  • Load – Generally a 3-phase electrical system, with 2 smaller legs each running 120 volts plus 1 wider leg running 208 volts—this reduces workload on individual wires but provides higher output when combined.

At J & S Electrical Contractors, Inc., we offer customized solutions to meet the unique needs of your industrial or commercial facility. Our customers are assured of quality workmanship, personalized attention and on-time, within-budget project completions. For over 25 years, plant and facility managers in New Jersey, Pennsylvania, Delaware, and across the country rely on us for a full range of electrical, commercial and mechanical contractor services.

Discuss your new electrical system installation, facility upgrade or expansion with our team. We will seamlessly co-ordinate every aspect of your project. Our commercial electricians are fully licensed, certified and up-to-date with technology and safety codes. From installation to maintenance and emergency repairs, you can depend on us for cost-efficient electrical solutions and outstanding customer service.

Call us at 215-633-8330 to learn more about our electrical services. Or request a quote online for your commercial and industrial projects.

Corporate Offices

J & S Electrical Contractors, Inc.
3170 Knights Road
Bensalem, PA 19020

Regional Offices

  • Allentown, PA: (610)432-6500

  • Woodbury, NJ: (856)845-1100

  • Princeton, NJ: (609)688-1100

Hours of Operation

  • Monday 7:00am-5:00pm

  • Tuesday 7:00am-5:00pm

  • Wednesday 7:00am-5:00pm

  • Thursday 7:00am-5:00pm

  • Friday 7:00am-5:00pm