Electrical Load Calculation Services

Phoenix Contracting Services provide minor service load calculations, one-line diagrams, feeder calculations, fault calculations and panel schedules.

Electrical Load Calculation

Phoenix Contracting Services provides electrical service load calculations up to 400Amps, electrical one-line diagrams, electrical feeder calculations, electrical panel calculations, electrical fault calculations and electrical panel schedules as prescribed per the National Electrical Code NFPA 70.

We have an electrical designer and electrical inspector in-house to expedite your design and can help you obtain your electrical permit.    

In addition, we also provide third party electrical engineering for larger projects upon request.

As a separate service, we aid in the collection of electrical data necessary for engineers to create reports for power monitoring, arc flash and selective coordination studies.

Whether it is a branch circuit, electrical feeder, or main electrical service, a good electrical installation should always have some form of approved load calculations performed and code conformity observed to ensure the electrical system design is safe and of sufficient capacity to carry the designed load.


  • This field is for validation purposes and should be left unchanged.

What is an Electrical Load Calculation?

The purpose of an electrical load calculation is to accurately determine if the electrical service and its feeders are of sufficient capacity to carry the calculated load shown, whether it is on a residential, commercial or industrial project. The basis used is the National Electrical Code to ensure an electrical service is sized properly and installed correctly.


Why should I hire a professional electrician?

In the electrical field, there are many things that can go wrong, some of which are costly while others could be dangerous.

So as a rule, always check references such as Google or the BBB before hiring an electrical contractor. These professionals should be licensed, experienced and have the ability to clearly share any deficiencies they find in your electrical system.

Why Do I Need One?

According to the National Fire Protection Association, “Between 2010 and 2014, U.S. municipal fire departments responded to an average of 45,210 home structure fires involving electrical failure or malfunction. These fires caused annual averages of 420 civilian deaths, 1,370 civilian injuries, and $1.4 billion in direct property damage.”

Phoenix Contracting Services is your one stop shop when it comes to Electrical Load Calculation Services.

  • We work on all brands of electrical equipment for example Square D, Siemens, Cutler Hammer, Eaton, Westinghouse, Crouse Hinds, Murray, Zinsco, Federal Pacific to name a few.
  • We have an electrical designer in house as well as electrical engineering availability upon request if needed.
  • We can take care of all scheduling and coordination of your utilities and municipalities, all you have to do is ask.
  • If we can’t repair it, we can replace it.
Jeff with his PCS truck preparing for a panel upgrade


  • This field is for validation purposes and should be left unchanged.


For emergency services, please call us at (602) 564-1144

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