Thomas Electrical
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Founded in 1987, Thomas Electrical Ltd provides high quality electrical engineering and specialist contracting services to both commercial and industrial installations right across the South of England. Our Resources - Whatever your requirements, our team of highly experienced engineers work alongside you to develop and implement effective solutions.

Their skills are fully supported by the resources available in our well-equipped workshops in Hertfordshire, where we have the capacity and flexibility to manufacture anything from a small sub-assembly to a full control system 7 meters long.
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For Your Peace of Mind - Thomas Electrical are accredited members of NICEIC, the industry's independent electrical safety regulatory body. NICEIC is approved by UKAS, the national body responsible for assessing and accrediting the competence of organisations in the field of calibration, measurement, testing and certification of systems, personnel and products.
Our NICEIC Approved engineers carry out a wide range of electrical installation services for residential, commercial and government organisations. We are trained to the highest standards and all comply to the latest safety regulations, for both Building Regulations, (Part 'P' Building Regulations), and Electrical, ('Electricity Supply' and 'Electricity at Work' Regulations).
It is now a mandatory requirement that all electrical installations are tested at regular intervals and carry a current electrical inspection certificate. This involves engineers carrying out a visual inspection of the installation, then a detailed test of each individual circuit, to verify that the installation has been designed and installed correctly and at the time of inspection is free from damage or deterioration of components.
All of our Control Panels are CE marked and conform strictly to their required standards. We build and design our Control Panels with ease of use and maintainability in mind. We also build custom Control Panels that can be supplied to any required size which can also be Interlinked. They can also be fully automated and are provided with full wiring diagrams.
A way of avoiding potential trouble 'head on' is to carry out a full thermal image inspection of the installation and its component parts to see at what temperature the installation is running at. In this way it gives our engineers the time to act before any of the components may fail, which could cause the loss of valuable production or 'down time' at the facility.
Reviews (5)
Robin Thompson
Robin Thompson
Apr 15, 2021
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I recently purchased from Thomas Electric a Generac whole house generator. I considered this a major investment but well worth the money knowing I will never be without power. Whether I am traveling or at home it’s a relief to know I don’t have to worry about power outages. The Thomas installers were very prompt, neat, and thorough! Let me also add The Thomas family who own and run the business came out to make sure placement and size were appropriate for my home. They answered all my questions and provided an accurate delivery and installation window of time. I know that this installation
Christine Debarr
Christine Debarr
Jan 04, 2021
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
They installed our generator and maintain it. We have been very pleased with their service over the past 3 years. We recomend them to everyone!
Service: Installation
Katie Ventrone
Katie Ventrone
Oct 02, 2020
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We have used Thomas Electric many times for electrical needs around our house. We always have been very pleased with this company, they do good quality work and please. Very trustable company.
Paul Shore
Paul Shore
Sep 01, 2016
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I had Thomas Electric come out and install a generator that I bought used. I knew nothing about them before hand. They were very friendly, worked very efficiently and went above and beyond when my second hand generator had problems. I would not hesitate to recommend them to my friends/family. Good people and a good business
John Sutter
John Sutter
Aug 27, 2016
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Ed, Natalie and company supplied and installed a stand by generator for us. They were great to deal with through out the process, and completed the project quickly. Everything neat and professional. I will recommend them for electrical work to friends and family.