NCIDQ IDFX Practice Exam

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Low voltage lamps typically operate at which voltage?

120V
277V
12V
24V

The correct answer is: 12V

Low voltage lamps are designed to operate at significantly lower voltages than standard line voltage. The use of 12V for low voltage lamps is particularly common in various applications, including landscape lighting, accent lighting, and track lighting systems. This lower voltage allows for a safer installation, especially in outdoor settings, and reduces the risk of electrical hazards. Additionally, using low voltage lamps enables the use of transformers to convert standard line voltages (like 120V or 277V) down to the required low voltage. This transformation allows for more efficient energy use and can provide brighter light output while minimizing the risk of shock and overheating. While 24V is also used, particularly in specific applications, 12V is the most commonly recognized standard for low voltage lighting systems. Therefore, 12V is the ideal answer for typical low voltage lamps.