Photograph everything before it moves. Wide shots of the room and the equipment in place, then progressively closer. Include the ceiling, the floor beneath the equipment, and what was stored nearby.
Do not reset, re-energize, or test the breakers. The trip state of a breaker is evidence and it is destroyed the moment someone flips it back. Same for GFCI and AFCI devices.
Photograph the panel with the deadfront on, then off. Capture the directory, the breaker positions as found, and each termination before anything is removed.
Lock down the scene against cleanup. Restoration crews move fast and they are not preserving evidence. Say so in writing to the owner, the contractor, and the restoration vendor.
Record the occupant's account while it is fresh. Flickering lights, warm outlets or cover plates, buzzing at the panel, breakers tripping, intermittent equipment problems in the weeks before. These map directly onto specific failure modes.
Preserve the whole circuit, not just the failed item. The breaker, the conductors, the terminations, the receptacle or connector, and the device. A component cut away from its terminations answers far fewer questions.
Keep the terminal hardware attached. Do not unscrew, straighten, clean, or separate connections. The deformation and oxidation patterns are the finding.
Bag and tag by location. Each item labeled with where it came from, who removed it, and when. Chain of custody starts now, not at the expert's first visit.
Preserve the product's context. Model and serial number, date code, ratings label, cords and accessories, packaging and manuals if they exist. Recall history and listing status become searchable once the unit is identified.
Do not disassemble anything. A unit opened without a joint protocol is an argument waiting to happen, and it can be a spoliation motion.
Store dry and stable. Wet or fire-suppression-soaked components corrode quickly, and corrosion overwrites the evidence.
Utility outage management and trouble-ticket records for the circuit, identified by address, circuit, and date.
Smart meter voltage and interval data. This can confirm or exclude an abnormal voltage event at the service, with timestamps, and it is one of the shortest retention windows.
Protective relay event data, SCADA logs, and recloser operation counts where a substation or distribution event is in play.
Equipment fault logs. EV chargers, inverters, UPS systems, BESS controllers, and building management systems all record events, and buffers overwrite. Pull them before the unit is powered down or returned to the manufacturer.
Permits, inspection records, and prior electrical work. Recent work on the system reframes the entire negligence analysis.
Maintenance and thermography history for commercial and industrial equipment, including any infrared survey that flagged a hot connection previously.
Multiple unrelated devices failed at the same time or within a short window.
Damage concentrated on one leg of the panel while the other leg was untouched.
Neighbors reported problems on the same day.
Lights were reported abnormally bright or abnormally dim before the failures.
The loss followed an outage, storm, vehicle strike on a pole, or visible utility work.
Any of the above points toward a service or neutral problem rather than a premises problem, and it is a different claim against a different party. Send the utility a preservation request immediately.
This checklist is general guidance for evidence preservation and is not legal advice or a substitute for an engineering evaluation of a specific loss. Use it, share it with your field adjusters, and put it in your loss-notification packet. No attribution needed.
Send party names and we clear conflicts immediately. If the electrical evidence does not support the theory, you will hear that early.
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