Technical Standards and Safety Authority (TSSA) G3 Practice Exam

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Is it true that a single-insulated power tool requires grounding?

  1. True

  2. False

The correct answer is: True

A single-insulated power tool does require grounding to enhance safety during operation. Grounding provides a path for electrical current to safely dissipate in case of a fault, such as a short circuit or insulation failure. This is particularly important for tools that may experience wear and tear over time, which can compromise their insulation. The rationale behind this requirement is to prevent electric shock hazards for users. If the tool’s insulation fails and the metal casing becomes energized, a grounded tool would allow the excess electricity to flow harmlessly to the ground rather than through the user. Therefore, proper grounding of single-insulated tools is a critical safety measure in order to minimize risk during usage.

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