New York State Master Electrician Practice Exam

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What is the maximum over-current protection for infrared lamps used in commercial and industrial heating appliances?

30 Amps
50 Amps
70 Amps
100 Amps

The correct answer is: 50 Amps

The maximum over-current protection for infrared lamps used in commercial and industrial heating appliances is 50 Amps. This value is determined by the National Electrical Code (NEC), which provides guidelines to ensure both safety and optimal performance in electrical systems. The 50 Amp limitation is established to protect the circuits from excessive current, which could cause overheating and potential fire hazards while allowing sufficient current for the proper operation of the heating appliances. Infrared lamps, commonly used for heating applications, require custom-tailored over-current protection to handle their specific load characteristics effectively. This ensures that during normal operation, there is enough power delivered to the devices, but it also limits the maximum current that can pass through the system to prevent damage during fault conditions. Hence, adherence to the 50 Amp standard is both a safety requirement and an industry best practice.