All the equipment shall be designed and manufactured for its particular location for continuous operation at the extremes of climate as listed in LC-2. Specifically, all equipment to be installed indoors shall be designed a.'ld manufactured for satisfactory continuous operation at an ambient temperature of 40°C and all equipment to be installed outside shall be designed and manufactured for satisfactory continuous operation at an ambient temperature of 45°C. Equipment supplied between ceilings and roofs shall be designed for satisfactory operation at an ambient temperature of 60°C