Infrared Electrical Inspection in Houston: Finding Trouble Before It Trips a Breaker
Infrared electrical inspection catches the failure that hasn’t happened yet. A connection loosens under vibration. A breaker runs hot inside its own panel. A phase goes out of balance and nobody notices until the day it stops running. None of it shows up on a walkthrough. It shows up on a thermal camera. That gap between “looks fine” and “is fine” is where most electrical failures live. It’s the whole reason this inspection exists. Why Connections Fail Quietly Electricity moving through a loose or corroded connection meets resistance it shouldn’t. Resistance makes heat. That heat doesn’t announce itself. No smell. No sound. Nothing visible to a technician standing three feet away with a flashlight. It just sits there, cycling hotter every time the load comes up, until the connection degrades further and the whole thing accelerates toward failure. A thermal camera sees what your eyes can’t. Temperature differences invisible in regular light show up as a clear anomaly against the surrounding equipment. A bright spot on a breaker. A hot phase on a three-phase feed. A connection running noticeably warmer than its neighbors on the same bus. It’s a temperature reading, plotted against everything around it. What an Infrared Electrical Inspection Covers A drone or handheld thermal survey scans your panels, switchgear, breakers, disconnects, motor control centers, and exposed connections for temperature anomalies. We use FLIR-based thermal systems for this work, either on the ground or in the air depending on access and layout. A rooftop transformer bank is a drone job. An indoor switchgear room usually isn’t. The inspection happens with the system energized and under its normal load. That’s the point. A shutdown inspection shows you a cold system, and cold systems rarely reveal anything. You need the equipment carrying its normal current, doing what it normally does, so struggling connections show themselves the way they would on any other afternoon. What Houston Summers Do to Electrical Systems Houston puts a harder load on electrical systems than most of the country, and for longer. Cooling equipment runs close to full tilt from May through September. Connections with margin in March are working at the edge of their tolerance by July. A marginal connection under sustained high load is exactly the setup that leads to failure. September usually surfaces it. Equipment that limped through peak heat starts throwing the problems it accumulated. A breaker that’s been running hot finally trips. A panel that’s been quietly degrading finally arcs. If you schedule an infrared electrical inspection once a year, late summer or early fall — after the stress, before winter demand adds another load swing — catches the most. NFPA 70B and Infrared Electrical Inspection Requirements This isn’t just good practice. It’s written into the standard that governs electrical equipment maintenance. NFPA 70B moved from a recommended practice to a mandatory standard in its 2023 edition. It calls for routine infrared inspection of electrical equipment on a defined interval, with shorter intervals for equipment flagged in worse condition. Facilities running a formal electrical maintenance program are increasingly expected to document this, not just perform it. Pull the current edition and check the exact interval for your equipment class before you plan around it. The specifics matter more than the headline, and we won’t summarize them here without the document in front of us. One more claim worth flagging instead of asserting: some insurance carriers reportedly require or discount for documented infrared electrical surveys as part of a loss-prevention program. We’ve heard this often enough to mention it. Verify it with your specific carrier before you budget around it, since coverage terms vary too much to state as fact. What Thermal Can’t Tell You Here’s the honest limit. Thermal imaging finds temperature anomalies. It doesn’t find every electrical problem. A connection can be electrically unsound — under-torqued, wrong gauge, a bad splice — without running hot enough to register yet, especially if it hasn’t seen full load recently. Thermal is a screening tool, a good one, but it’s not a substitute for a qualified electrician physically inspecting and torque-testing connections on schedule. Anyone who tells you a thermal scan replaces hands-on electrical maintenance is selling you something. It also won’t help on equipment that sits idle or lightly loaded most of the time. Thermal finds problems that show up under load. A facility running at 20% capacity only gets a scan as good as the load it happens to catch that day. What It Costs As a Houston market estimate — not our rate card — a straightforward infrared electrical survey of a single panel or small switchgear lineup typically runs a few hundred dollars. Larger facilities with multiple panels, switchgear, MCCs, and rooftop equipment scale up from there, often into four figures for a full building survey with a written, annotated report. Get a number for your specific equipment count and layout before assuming either end of that range. When It’s Not Worth Doing New, lightly loaded equipment still under warranty probably doesn’t need an annual scan in year one. Value climbs with equipment age, load, and criticality. A data center’s UPS system and a strip mall’s lightly used panel don’t need the same inspection cadence. Match the frequency to what’s actually at risk, not to a blanket schedule. Frequently Asked Questions Does the power need to be shut off for the inspection? No. The inspection happens on energized equipment under normal load. That’s what makes the temperature readings meaningful. How often should this be done? NFPA 70B sets the baseline interval, with shorter intervals for equipment already flagged in worse condition. Most commercial facilities land on an annual scan at minimum, timed for late summer when systems have been under peak load. Can this replace an electrician’s inspection? No. Thermal imaging tells you where to look. It doesn’t replace torque-testing a connection or an electrician’s hands-on work. What equipment gets scanned? Panels, switchgear, breakers, disconnects, motor control centers, transformers, and any accessible connection carrying load. Rooftop and elevated equipment is where aerial inspections add the









