Electrical Expert Witness

Joseph Perry PE

Experienced electrical engineer and electrical contractor providing expert witness services

Meet the Expert

Mr. Perry a licensed Professional Electrical Engineer and Electrical Contractor, can be of service to you as an electrical expert witness in cases regarding Electrical Construction Defects, Personal Injury due to Electrical Accidents, Electrical Controls for Water \\ Wastewater, Pump Station, Tank, or Treatment Plant and related causes of Sewage Spills or Tank over filling causing flooding, Standards of Care by Electrical Engineers and Contractors. Licensed in CA and HI
Mr. Perry is located in Northern California, and is willing to travel as required to serve your needs.
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Certified Forensic Litigation Consultant

Years Electrical Engineering Experience

Years Expert Witness Experience

Why Choose Me?

A diversified expert approach

Joseph A. Perry P.E. being an Electrical Engineer Expert Witness, and Electrical Contractor Expert Witness brings a unique perspective to the investigation of your case. As an Electrical Engineer, I am interested in the Forensics of the Design and Details of the plans and specifications as to how the contractor was required to build the system. As an Electrical Contractor, I am interested in the materials, labor and how the installation was completed.

As a  Professional Member of the Forensic Expert Witness Association (FEWA) I am continuing my professional Expert Witness Training by attending scheduled meetings, attending seven National FEWA Conferences and countless hours of Expert Witness seminars and trainings encompassing Depositions, Video Depositions, Report Writing, Engagement Contracts, Jury Selection, and Jury Presentation strategies. I have been awarded the FEWA designation of “Certified Forensic Litigation Consultant” for completing a rigorous curriculum and being an active participant in FEWA training’s, events and leadership.


Electrical Engineering Review and P.E. Stamping Service

Design Build projects by Electrical Contractors frequently need a Professional Electrical Engineer review, approval and a Wet Stamp of their plans when submitting a project for a Electrical Building Permit. I can review the plans and calculations to verify a proper design that will meet the currently adopted version of the National Electrical Code, when approved I can affix my Electrical Engineers Stamp and Wet Sign the Plans.


Sonoma County Permit and Resource Management (PRMD)

While the CEC imposes no limit on the size of the “Service” for a structure, local permitting agencies along with local utility
providers may confirm the need for higher amp electrical services by asking for load calculations and line drawings. These calculations and line drawings can be provided by Electrical Engineering Expert Joseph Perry P.E.

For a “Service” that is greater than 400 amps, Permit Sonoma requires load calculations and line drawings, prepared and signed by an electrical engineer as part of the submittal package when applying for an electric meter or an electric meter upgrade. These calculations and line drawings can be provided by Electrical Engineering Expert Joseph Perry P.E.

Future, proposed, or other projected needs, will not be considered viable loads when justifying amperage needs for a “Service” unless the proposed use is being permitted at the time of application for a “Service”.

“Services” of 400 amps or greater will not be issued over the counter.

When applying for a second meter, utility companies require a separate address from the structures being served by a meter. Permit Sonoma views separate addresses as a separate use. Any separate address must meet the Zoning use requirements for that site. Structures that are accessory to the main use will not routinely be issued a second meter as they are secondary and incidental to the main use.

All 3-phase electrical service requests will be considered a “commercial” service. Commercial electrical services require calculations and line drawings and will not be issued over the counter, required documentation can be provided by Electrical Engineering Expert Joseph Perry P.E.


Sonoma County Logo

PRMD Technical Bulletin

CFLC logo

Certified Forensic Litigation Consultant

Building Codes

Electrical Construction

Construction Damages

Construction Site

Electrical Site Inspections

Electrical Engineering

Equipment & Machinery

Electrical Fire Analysis

Industrial Power and Control Design

Scheduling Delay & Analysis

Water/Sewage Treatment Plant Engineering

Client Testimonials

“I just wanted to thank you for your clear and very helpful explanation of the seriousness of the electrical defects for Mr. And Mrs. Winslow today. That was exactly what I had hoped for, giving them a clear description of the issues, coupled with some sense of the risks involved – difficult as they may be to quantify.”

-David W esq.

David, it was my please to represent your owner – client in this case . As your Electrical Engineer Expert Witness, I was able to examine the complete electrical system including the 100’s of can type fixtures that were installed when the house was remodeled and sold as completely rewired. We were able to prove that the wiring had not been completely replaced as advertised and analyze the condition of the existing wiring.

-Joseph Perry

“Mr. Perry, you did great job for our team, I can see that this is not your first Rodeo! I’ve got another one I want you to investigate in Petaluma.”

-Hal C. Esq.

Hal it was my pleasure to inspect the electrical system in the apartments and outside light circuits. Frequently owners will tap off electrical circuits for common area lights, and steal electricity from an unsuspecting tenant just as we found in this apartment complex. I was satisfied that as your Forensic Electrical Engineer Expert Witness in this case we were able to determine that Electricity theft had been going on for quite some time.

-Joseph Perry

“Mr. Perry handled an extremely complex products defect case for us involving technical concepts and devices. He identified the key liability issue, which only a person with real life experience would have seen. His analysis was the key to our successful resolution of the case. He was always responsive and easy to work with. He’s the go-to guy for electrical engineering and contracting issues.”

-Kevin O. Esq.

Kevin, I appreciate your confidence in me to bring me in on this Industrial Crane Control case. As your Electronic Control Expert Witness, I was able to prove that the remote radio control for the bridge cranes was not properly programmed with unique identifiers to provide independent control of each crane handheld radio control. Overlapping control had been reported on several occasions, yet the previous experts failed to identify the overlap in the programming of unique identities of the controls. This all came to a head when a crane operator had stopped his crane but soon after it began to move without him giving the crane a command. When the crane hook hit him a traumatic brain injury occurred.

-Joseph Perry

“I am an independent legal consultant/expert with over 30 years’ experience specializing in electrical cases involving construction, explosions, arc flashes, vehicle fires and airline incidents to mention a few areas. I recently had the pleasure of working with Mr. Perry, an electrical engineer from California on an electrical arc flash incident. I found Mr. Perry to be very detail orientated when it came to analyze the evidence and facts of the case. Of most importance he was insistent on having all the evidence prior to making any conclusions or giving any opinions. He is extremely knowledgeable in the areas of the National Electrical Code, NFPA 70E and OSHA regulations. Mr. Perry’s hands on experience in the electrical construction field was very helpful in determining and verifying the status of the electrical systems code compliance. He is very willing to work as a team and consider all possibilities and scenarios. I would highly recommend Mr. Perry as an expert electrical engineer for cases involving a wide range of electrical issues. I am personally looking forward to working with him again soon.”

-Carl H. Electrical Engineer

Carl, I appreciated working on your Forensic Electrical Engineering Expert Witness team to solve the unique riddle as to what had happened when the pullout fuse holder flashed over and caused the electrician who was replacing fuses to be badly burned. We were able to identify that the wrong voltage rating of equipment had been installed some time during a previous tenant improvement as the original switchgear drawings did not include this fused pullout in the switchgear panel. My practical Electrical Contracting Expert Witness experience allowed me to recognize that the pullout fuse holder was the wrong voltage rating for this service.

-Joseph Perry

“Joe did an excellent job analyzing the costs of replacing exterior transformers used by a metal finishing company, including the costs associated with engineering and installation. His consultation provided us with critical information that shaped our defense to the alleged costs of replacing the external transformers.”

-Hakop S. Esq.

Hakop, this was a unique project as it is unusual that a commercial manufacturing plant downsize the electrical service. As your Electrical Engineering Expert Witness I was able to analyze the utility company charges to remove two transformers and down size this service after a building fire. The owner of the plant had requested exaggerated reimbursement costs, which we successfully refuted.

-Joseph Perry

“Joe came in on short notice for my case which involved a power outage and negligent utility inspections.  He made a presentation at mediation regarding the use of infrared inspections and underground inspections and how the defendant should have been aware of the issue that caused the loss.  His work helped get us a good result for the client.  He was very professional and easy to work with.”

-Jordan E. Esq.

Jordan, being familiar with underground utility testing procedures allowed me to provide an Electrical Power Engineering Expert Witness presentation to the mediator. This presentation raised the question to the utility “If the utility had performed adequate preventative maintenance on the 60 KV power lines that delivered power to the semiconductor manufacturing plant.” It was discovered that the utility did not use Infrared Thermal Imaging in their preventative maintenance plan, hence the utility failed to recognize 60 KV splices that were degraded and overheating under normal operating conditions.

-Joseph Perry

“Mr. Perry was conscientious and responsive to our requests. He was detail oriented, had a firm grip of industrial electrical engineering and system controls. Mr. Perry was efficient in evaluating and responding to opposing expert witness contentions. We would certainly consult with Mr. Perry again in connection with construction defect cases involving electrical issues.”

-Jill D. Esq.

Jill it was my pleasure to represent the Electrical Design Engineer in this case. I found that when the Generator Automatic Transfer Switch (ATS) failed to properly transfer the electrical load to the generator the Reduced Voltage Soft Start (RVSS) failed. As your Electrical Engineer Expert Witness and Electrical Contractor Expert I have designed and installed close to 100 standby generators, with my practical experience I recognized the ATS failure and the solid state RVSS failure and testified in mediation that the failures were not caused by the Electrical Engineers design.

-Joseph Perry

“Mr. Perry assisted me in a complex fire reconstruction analysis involving a multi-million-dollar commercial loss. I attended the forensic inspection with Mr. Perry and can attest to his expertise, his thoroughness, and professionalism in the matter. I recommend him highly.”

-Mark R. Esq.

Mark, I appreciate being your Forensic Expert Witness in this case. I attended the burned material investigation at Fire Cause Analysis office in Berkley CA. The Forensic Expert witnesses were able to separate the burned electronic parts and X-ray those pieces that we could not separate. It was determined that the electronic equipment was not at fault, but the power supplies were installed in an area that had inadequate ventilation and a source of combustible fuel in close proximity to the power supplies, this fuel ignited and caused the fire.

-Joseph Perry

“I appreciate your attention to detail & timeliness on the tight deadlines. I’ll call you on my next Electrical Defect case.”

-Michael M. Esq.

Michael, I stand ready to represent your interest on your next case that requires an Electrical Engineering Expert Witness. Your case was unusual due to the electrical contractor not having control of the wire to be installed and the General contractor damaging the wire prior to installation by the electrical contractor. It is imperative for a flawless installation of underground circuits that the conduit and wire be immaculately clean and free of nicks and scrapes before and after installation.

-Joseph Perry

Contact Me


3141 Stevens Creek Blvd; Suite 40259 San Jose , CA 95117