Wiring and componentsQuestion 448 of 1506

What does the colour of a twist-on wire connector usually show?

The system voltage
The connector size and its capacity
The material of the wire
The date of manufacture

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Correct answer: The connector size and its capacity

Colour coding helps select the right size.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 9.3: Solderless connectors

Questions last reviewed: 18 October 2026

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