Wiring and componentsQuestion 446 of 1506

What does a twist-on connector do when it is turned onto stripped wire ends?

It melts the strands together into one solid joint
Its metal insert pulls the wires together and squeezes them
It cuts through the insulation and clamps the bare copper
It locks each wire in place with a small set-screw

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Correct answer: Its metal insert pulls the wires together and squeezes them

The insert grips the twisted wires and gives a firm, continuous connection.

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

Questions last reviewed: 18 October 2026

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