Room temperature, when specified, shall be determined by means of four No. 24 AWG (0.21 mm2)
iron-constantan bead-type thermocouples, the junctions of which are shielded from radiation. These
thermocouple junctions shall be located so that room air temperature can be measured at points
approximately 24 in (610 mm) away from the approximate mid-points of each of the four sides of the
appliance or test enclosure. The thermocouple leads shall be connected to a temperature indicating
device, and room temperature shall be the average of the four individual temperature readings.