Safety and work practicesQuestion 426 of 1506

A system has a grounded neutral. A live conductor touches an equipment frame that is not bonded. A person touches the frame and the earth. What shock voltage is possible?

240 V
120 V
0 V
60 V

Show answer

Correct answer: 120 V

The person is exposed only to the line-to-neutral voltage, 120 V. That is half of the 240 V line-to-line value.

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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