The image below shows some very typical electrical distribution equipment with a very common fault.
Components like this are found in EVERY factory or facility that produces electricity.
This type of problem has the potential to burn your factory or premises to the ground.
In this instance the issue is a connection defect. There is increased in resistance and localized heating at the connection with a corresponding thermal gradient.
There could be a number of reasons for the cause of failure (loose, oxidized, corroded or dirty contact surfaces are just a few examples).
There is tremendous value identifying electrical faults at an early stage, none more important that potentially saving your life.
Don’t cut corners!!