Infrared cameras can pick up small changes in temperature not visible to the human eye. It is a non contact, non destructive , and fairly simple method of detecting impending electrical problems. I t is widely known that as temperature in a conductor rises, so does it's resistance. The majority of thermal electrical problems involve improper torque specifications or improper installation at the junction points. A loosely torqued connector effectively reduces the surface area in which current can flow and consequently an increase in the contact resistance.
Oxidation build up at the connection point can also cause a rise in resistance.
The origin of most conductor, insulation, and component problems can be traced to a poor connection using an infra-red camera. Unless you are a qualified electrician DO NOT ever handle electrical wires, panels, or components. I f properly conducted infrared electrical surveys are safe, fast, and reliable. Infrared cameras are non-contact so inspections can be performed at any time without shutting down the facility. Have them open the panels and guide your access to components.