Independent Electrical Contractors (IEC) Year 2 Part 1 Practice Test

In the context of the Veterinary Center project, exhaust fans typically require a lower voltage to accommodate smaller motors and ensure safer operation in environments where animals are present. A voltage of 120V, single-phase is commonly used for smaller appliances and equipment, making it an appropriate choice for exhaust fans that do not need the high power that three-phase systems provide.

Using 120V ensures that the equipment remains easy to install and maintain, while also providing adequate functionality for the fan's purpose without introducing the complexities associated with higher voltages. Additionally, this lower voltage aligns with standard residential and light commercial electrical systems, making it suitable for facilities like veterinary centers where high power demand is not needed for exhaust fans.