Electrical mathQuestion 1034 of 1506

A balanced delta-connected load has a phase current of 20 A. What is the line current?

20 A
11.5 A
60 A
34.6 A

Show answer

Correct answer: 34.6 A

In delta, IL = Iphase × √3 = 20 × 1.732 = 34.6 A.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 7.5: Three-phase Y and Delta Configurations

Questions last reviewed: 18 October 2026

Red Seal Electrician Practice needs JavaScript to run. Use its questions for practice. The real pass mark is usually 70%. Check it with your province or territory's apprenticeship office.