Safety and work practicesQuestion 429 of 1506

What is the main purpose of grounding an electrical system?

To increase the system voltage
To remove the need for overcurrent devices
To guard against electrical shock and fire hazards
To make the load current smaller

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Correct answer: To guard against electrical shock and fire hazards

Grounding reduces shock voltage and helps overcurrent devices operate.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 7.4: Three-wire Power Supply System

Questions last reviewed: 18 October 2026

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