Nate Electrical Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the function of an isolator switch?

To increase circuit efficiency

To change voltage levels

To ensure safe disconnection from the power supply

An isolator switch is specifically designed to ensure safe disconnection from the power supply. Its primary function is to provide a way to isolate electrical equipment, allowing for safe maintenance or repair work. By ensuring that the power supply is fully cut off, the isolator protects both the technician and the equipment, helping to prevent electrical accidents such as shocks and short circuits.

While increasing circuit efficiency, changing voltage levels, and controlling current flow are important functionalities in electrical systems, these are not the primary roles of an isolator switch. Instead, isolators are fundamentally safety devices that create a clear separation between the energized circuit and the work environment, emphasizing safety as the key aspect of their operation.

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To control current flow

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