Thermographic Surveys
Professional Thermographic Surveys Across the UK
Identifying Overheating Connections, Failing Components and Overloaded Circuits Before They Cause Failure or Fire
Electrical Testing UK carries out thermographic surveys of electrical installations for businesses, facilities managers and public sector organisations. Thermographic imaging detects heat generated by resistance in loose or corroded connections, overloaded conductors, failing components and imbalanced loads, faults that produce no visible sign and cannot be identified by conventional electrical testing alone. Left undetected, these conditions cause equipment failure, unplanned downtime and, in serious cases, electrical fire. Our engineers survey distribution boards, switchgear, busbars, cable trays and other electrical infrastructure under operational load conditions using calibrated thermal imaging cameras, producing a detailed report with thermal images, temperature differentials and prioritised recommendations for every anomaly identified.
Key Features Include
Infrared Imaging Under Live Load Conditions
We carry out all thermographic surveys with the installation operating under normal load conditions, ensuring that heat-generating faults are visible and accurately measured at the time of survey.
Calibrated Thermal Imaging Equipment
We use calibrated thermal imaging cameras with the resolution and sensitivity required to detect temperature differentials in electrical equipment accurately, not entry-level devices that miss marginal faults.
Prioritised Fault Reporting
Every anomaly identified is reported with a thermal image, measured temperature differential and a priority rating, immediate action, short-term attention or monitor, so maintenance teams can allocate resource appropriately.
All Electrical Infrastructure Covered
We survey the full range of electrical infrastructure including distribution boards, motor control centres, switchgear, busbars, cable containment, transformers and UPS systems.
Remedial Work Directly Available
Where survey findings require remedial electrical work, Electrical Testing UK carries out the work directly, tightening connections, replacing failing components and resolving overload conditions without the need for a separate contractor.
Thermographic Surveys for Every Type of Electrical Installation and Industry
Thermographic Surveys for Commercial Premises and Distribution Boards Commercial premises with multiple distribution boards, significant electrical load and sensitive IT or HVAC infrastructure benefit from regular thermographic surveys as part of their planned maintenance programme. Loose connections in distribution boards, failing MCBs and overloaded neutral conductors are among the most commonly identified faults in commercial installations. We survey distribution boards and associated electrical infrastructure in offices, retail premises, hotels and multi-tenancy buildings, identifying faults before they cause disruption or damage.
Thermographic Surveys for Industrial Sites and Switchgear Industrial electrical installations carry high currents through complex switchgear, motor control centres, busbars and cable systems. The consequences of undetected faults at industrial scale, unplanned production stoppages, damage to capital equipment, fire, are severe. We carry out thermographic surveys of industrial switchgear and distribution infrastructure, identifying hotspots in busbar connections, cable terminations, switching devices and motor controls and prioritising findings by the urgency of the action required.
Thermographic Surveys for Public Sector and Healthcare Buildings Hospitals, schools, local authority buildings and other public sector premises with critical electrical infrastructure and continuous occupancy requirements benefit from thermographic surveys as part of their statutory maintenance programmes. We carry out thermographic surveys for public sector clients, providing detailed reporting in a format suitable for estate management records and compliance documentation.
Thermographic Surveys as Part of a Wider Testing Programme Thermographic surveys deliver the most value when combined with periodic electrical inspection and testing. An EICR identifies compliance deficiencies in the installation; a thermographic survey identifies developing faults under operational load that may not yet have produced a measurable change in circuit parameters. We offer thermographic surveys as a standalone service and as part of combined testing programmes alongside EICRs, panel risk assessments and PAT testing.
From Site Access to Prioritised Report
Surveying the installation under operational load Thermographic surveys must be carried out with the installation operating under representative load conditions, typically at least 40% of maximum load, to ensure that heat-generating faults produce a detectable temperature differential. We coordinate survey timing with site teams to ensure access to all distribution boards, switchgear and other electrical infrastructure during normal operational hours, minimising disruption while maximising the effectiveness of the survey.
Identifying and recording anomalies Our engineers systematically survey all accessible electrical equipment, recording thermal images of every anomaly identified alongside a reference visible-light photograph of the same equipment. For each anomaly we record the peak temperature of the hotspot, the temperature of a reference point on the same equipment operating under the same load, and the temperature differential between the two. Temperature differentials are classified in accordance with recognised severity criteria to determine the priority of the recommended action.
Delivering a clear, actionable report On completion we provide a written report containing a thermal image and visible-light photograph of every anomaly identified, the measured temperatures and temperature differential, a description of the likely cause and the recommended remedial action, and a priority rating. The report is structured to allow facilities managers and maintenance teams to act on findings without requiring specialist interpretation, with immediate action items clearly distinguished from items that can be scheduled into planned maintenance.
Why Businesses and Facilities Managers Choose Electrical Testing UK for Thermographic Surveys
Faults that conventional testing cannot find Thermographic imaging identifies developing faults under operational load conditions that produce no measurable change in circuit parameters and no visible signs of deterioration. It is the only reliable method of detecting loose connections, failing components and load imbalances before they cause failure.
Calibrated equipment and qualified operators We use calibrated thermal imaging cameras operated by engineers who understand electrical installations and can correctly interpret what they are seeing. A thermal anomaly in an electrical installation requires electrical knowledge to assess, not just a camera and a report template.
Surveys combined with remedial work Where our survey identifies faults that require remedial electrical work, we carry out the work directly. Connections retightened, components replaced and overload conditions resolved by the same contractor that identified them.
Insurance and compliance value Many insurers recognise thermographic surveys as evidence of proactive electrical maintenance and require them for high-value or high-risk premises. Our survey reports provide the documented evidence insurers and compliance auditors require.
Qualified engineers, not subcontractors All thermographic surveys are carried out by our own NICEIC-qualified engineers. We do not subcontract, so quality and accountability remain with Electrical Testing UK throughout.
Our Work
Thermographic Surveys
Electrical Testing UK carries out thermographic surveys of electrical installations at commercial premises, industrial sites and public sector buildings across the UK, identifying overheating connections, failing components and overloaded circuits and providing prioritised reporting that allows maintenance teams to act before faults cause failure or fire.
National Coverage
We are a local Lincolnshire business, but with satellite offices in Peterborough, Cambridge, Nottingham and Enfield, no matter where you’re based in the UK, we can help. Just give us a call or drop us an email.
