Refrigeration & Air Conditioning Mechanic Red Seal · Question
According to Canadian electrical codes, what is the maximum permissible temperature rise for a motor winding using Class F insulation?
Class F insulation has a maximum operating temperature of 155°C. The temperature rise is specified relative to an ambient temperature.
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Question: According to Canadian electrical codes, what is the maximum permissible temperature rise for a motor winding using Class F insulation?
Answer options:
- 80°C
- 105°C
- 130°C ✅ 155°C
Correct answer: 155°C
Explanation: Class F insulation has a maximum operating temperature of 155°C. The temperature rise is specified relative to an ambient temperature.
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- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
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