Electrical Thermal Inspections — Whole-of-Installation Infrared
An electrical thermal inspection extends the same infrared methodology used for switchboard scanning across the entire electrical installation. For commercial buildings, factories and warehouses where downtime is expensive, a whole-of-site inspection is the most complete way to find heat-related faults before they cause an outage, equipment loss or fire. Every piece of accessible current-carrying equipment is scanned live, photographed, measured and graded.
What's Included
- Main switchboards and distribution boards
- Motor control centres (MCCs) and starter cubicles
- UPS systems, inverters and power conditioners
- Transformers, capacitor banks and major isolators
- Busways, busbars and tap-off boxes
- Cable terminations and junction boxes
- Variable speed drives (VSDs) and harmonic filters
- Comprehensive PDF report with prioritised actions
What Faults Are Detected in Switchboards
A site-wide infrared inspection finds the same connection-level faults as a switchboard scan, plus a wider set of plant and distribution faults that only show up under load. The most common findings across a whole-site inspection are:
Overheating connections
Loose or oxidised bolt-on connections at busbars, breaker terminals, MCC starter blocks and contactor terminals — the most common single fault on every commercial site.
Loose terminations on motor and plant feeders
Vibrating equipment (motors, compressors, chillers) loosens lug terminations over time. A hot lug on a 75kW motor feeder is a textbook precursor to a costly unplanned outage.
Overloaded circuits and feeders
Loads creep upward as buildings change use. Infrared inspection identifies feeders, sub-mains and breakers that are now running closer to capacity than the original design assumed.
Phase imbalance across the installation
Whole-site scans frequently show one phase running consistently hotter across multiple boards — usually a sign that single-phase loads need rebalancing across the supply.
Failing motor starters and contactors
Pitted contacts inside DOL starters, contactors and changeover switches show as one pole hotter than the other two. Catching this before the contact welds avoids a forced motor replacement.
Overheating UPS, transformers and capacitor banks
UPS modules, dry-type transformers and PFC capacitor banks all have characteristic thermal signatures when something is wrong — failing modules, blocked ventilation, blown internal fuses or saturating cores.
Harmonics and overheating neutrals
Buildings with heavy non-linear loads (data, LED lighting, VSDs) often show neutrals running hotter than the active phases — a clear harmonic problem requiring mitigation.
Cable joint and termination defects
Joints in larger feeders, busway tap-offs and underfloor cable terminations all show as discrete hot spots when contact resistance is rising.
What the Thermal Imaging Report Includes
A whole-site infrared report is structured so facilities, electrical and insurance teams can act on it immediately. Every report includes:
Thermal + visible-light image pairs
Each finding is photographed in both infrared and visible light so the exact piece of plant is unmistakable when remediation is scheduled.
Temperature differences (Delta T)
Component temperature, ambient, reference and ΔT are recorded for every finding — turning a colourful image into a quantified, defendable fault classification.
Severity ratings
Each finding is graded against an industry-standard 4-class severity scale (monitor, repair at next maintenance, repair within 30 days, urgent) adjusted for circuit criticality.
Recommended actions
Specific remediation per finding — re-torque, replace lug, rebalance phases, replace contactor, upgrade neutral, investigate harmonics — so your electrician can quote and schedule directly from the report.
Equipment register and trending
Every scanned asset is logged. On follow-up inspections, findings are trended over time so chronic issues become visible.
Insurance-ready PDF
Delivered as a structured PDF including thermographer credentials, equipment used, calibration date and inspector signature — the exact format insurers and risk managers expect.
Why Businesses Use Thermal Imaging
A whole-of-installation thermal inspection is now the default annual exercise for most Australian commercial and industrial property portfolios. The drivers are:
Fire prevention across the whole site
Switchboards aren't the only place electrical fires start. MCCs, UPS rooms, capacitor banks and motor terminations all carry fire risk. A site-wide infrared scan covers the whole risk envelope, not just the main board.
Insurance compliance
Australian insurers increasingly require periodic thermal imaging across the installation as a condition of commercial property cover — particularly for industrial, healthcare and data-centre risks. A current report is an expected renewal document.
Downtime reduction
Unplanned electrical outages on production sites and data centres cost thousands per hour. Infrared inspection converts random failures into scheduled maintenance, protecting throughput and uptime SLAs.
Asset protection and life extension
Catching connection faults early prevents collateral damage to switchgear, transformers and motors — equipment that is expensive, often custom and slow to replace.
Workplace and electrical safety
Faulty energised equipment is a hazard for everyone working on or near it. A documented inspection program reduces arc flash, electrocution and fire risk to staff and contractors.
ESG, compliance and audit
Many corporate maintenance and ESG frameworks now expect periodic infrared inspection. The PDF report library is the audit trail.
Who Needs This
- Manufacturing and processing facilities
- Data centres and server rooms
- Multi-tenant commercial buildings
- Warehouses and logistics centres
- Hospitals, aged care and healthcare facilities
- Hotels and hospitality groups
- Cold storage and food processing
- Government, education and defence sites
Why It Matters
Heat is the earliest warning sign of nearly every electrical failure. By scanning the whole installation under normal load, your electrician finds issues — at switchboards, at MCCs, at UPS systems, at motor terminations — before they cause an outage, equipment loss or fire. The cost of an annual whole-site infrared inspection is a fraction of a single hour of unplanned production downtime.
What a Whole-Site Electrical Thermal Inspection Covers
Whereas a switchboard inspection focuses on main and distribution boards, a whole-site electrical thermal inspection extends the same methodology to every piece of accessible current-carrying equipment. On a typical commercial or industrial site, that includes the main switchboard, every distribution sub-board, every motor control centre and starter cubicle, UPS systems, distribution transformers, capacitor banks, busways and major tap-offs, larger cable terminations and any custom plant.
Inspections are scoped from a single-line diagram and a switchboard schedule. The thermographer plans the route to minimise disruption, inspects each asset under representative load, and tags every finding against the asset register so the report can be acted on without anyone having to guess which board or starter is being referred to.
How Findings Are Classified
Findings are classified using a 4-class severity model aligned with international thermography practice. Class 1 findings are monitored and re-inspected at the next cycle. Class 2 findings are scheduled into the next routine maintenance window. Class 3 findings are repaired within 30 days. Class 4 findings are treated as urgent and quoted for immediate rectification.
Severity is set from the Delta T (temperature difference between the suspect component and a meaningful reference), adjusted for circuit criticality and load. A 15°C ΔT on a redundant warehouse sub-board reads very differently to the same ΔT on a hospital UPS feeder — and the report reflects that.
Standards, Licensing and Frequency
All work inside live electrical equipment in Australia must be performed by a licensed electrical contractor under AS/NZS 3000 and applicable state electrical safety regulations. Thermography itself is performed in line with ISO 18434 and ASNT-aligned practice, typically by thermographers holding Level 1 or Level 2 qualifications on top of their electrical licence.
Most commercial and industrial sites scan annually. High-load, high-risk or insurance-driven environments — data centres, hospitals, manufacturing — often run on a 6-month cycle. After major plant changes, refurbishments, or following an electrical incident, an out-of-cycle baseline scan is strongly recommended.
How It Works
- 1
Scope your site
Tell us your address, switchboard count and equipment types. We match you to a licensed thermographer.
- 2
On-site scan
Live infrared imaging of all accessible electrical equipment under normal load.
- 3
Report and action plan
Receive a prioritised PDF report with severity ratings, ΔT values and recommended actions.
Frequently Asked Questions
Related Reading
Switchboard thermal imaging
Focused infrared inspection of main and distribution switchboards.
Infrared electrical inspection
Non-invasive infrared scans of live electrical equipment — same methodology, different name.
Switchboard hot spots explained
How hot spots form, why they're dangerous, and how to find them early.
Thermal imaging cost
Typical pricing for whole-site electrical thermal inspections in Australia.
Thermal imaging for insurance
What property and business interruption insurers expect to see.
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