Frequency of Thermographic Test or Thermography Test for Electrical Panels – Thermal Imaging The frequency of Thermographic tests for electrical panels varies depending on various conditions. A few of them are listed below:  When environmental conditions are influential like wet and humid weather, corrosive condition  Frequent failure due to temperature rise in certain nodes For all practical purposes, Thermal imaging for all your electrical panels and related systems should be carried out every 12 months and more frequently if deemed so. In fact, many times, it has become a prerequisite for insurance renewals (which is yearly).