Inspiration for a huge timeless dark wood floor and brown floor kitchen remodel in San Francisco with an undermount sink, recessed-panel cabinets, white cabinets, granite countertops, black backsplash, ceramic backsplash and stainless steel appliances
@Leiani: Ambient is the surrounding temperature, it's not an average or an idea. The ambient temperature of a given space could be 30 degrees or 200 degrees. To say, Humans function so much better when the temperature is ambient could mislead some people.
If the room ambient is 40 [degrees] C, then the allowable temperature rise is as follows. Average rise = 105 [degrees] C (hot spot) minus 10 [degrees] C minus 40 [degrees] C (ambient) = 55 [degrees] C. Thus the transformer must be capable of withstanding a 55 [degrees] C average temperature rise.he difference in temperature between a nonoperating transformer (cold condition) and one at full load equilibrium point (hot condition) is called temperature rise. It usually is measured in degrees Centigrade.