The operating temperature of the switch is 32 to 104 degrees Fahrenheit (0 to 40 degrees Celsius) at sea level. High humidity can cause moisture to enter the switch. Moisture can cause. Electrical equipment designed and manufactured according to national standards typically has an upper limit of 40℃ for its operating environment temperature. During the hot summer months, outdoor distribution boxes, exposed to direct sunlight and heat generated by their own operation, can easily. What is the ambient operating temperature range for all the general duty, heavy duty, and double throw safety switches? Issue: Product Design Features Product Line: General Duty, Heavy Duty and Double throw Safety Switches Resolution: The normal ambient operating temperature range is -30 degrees C. Keeping the right temperature inside an electrical enclosure is very important. If it gets too cold, water can form inside and cause short circuits or damage. You'll learn. IEC 61439 establishes comprehensive design rules for low voltage switchgear assemblies up to 1000V AC or 1500V DC, mandating verification of temperature rise limits, short-circuit withstand strength, dielectric properties, and protection against electric shock through testing, calculation, or.