Short circuit, overload, abnormal operation, household appliances and the condition of the electrical installation.
A wiring-related fire hypothesis must be tested for signs of abnormal operation, overload, short circuit, insulation damage, improper installation or equipment use.
A melted conductor does not automatically mean that electrical systems caused the fire.
An electrical component can change before a fire starts or as a result of its development. Explanation requires considering its location, circuit condition, other traces and incident materials. A photograph of a melted section without provenance does not establish the sequence.
Do not power up surviving equipment or clean damaged components yourself to “test” them. Whether and how items may be handled and transferred depends on safety and the examination’s purpose.
The opinion must distinguish observed signs, the hypothesis tested and the limits of a causal finding. An electrical line of inquiry does not automatically establish a particular person’s culpability.
On this subject: After a fire: materials to gather before dismantling structures.
Describe the circumstances and attach photographs, an official decision or certificate, EMERCOM materials, insurance documents, a court order or another expert’s report. Reviewing them will help define the type of work, timeframe and cost.
