Red Seal Electrician Practice
Wiring and componentsQuestion 424 of 1506

In a 120 V/240 V single-phase three-wire system, what is the voltage from either line to the neutral?

  1. 240 V
  2. 120 V
  3. 60 V
  4. 170 V
Show answer

Correct answer: 120 V

Each line to the neutral is one of the two 120 V sources.

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

Practice wiring and components

Questions last reviewed: 18 October 2026