Red Seal Electrician Practice
Wiring and componentsQuestion 657 of 1506

Why is a solderless breadboard unsuitable for high-current circuits?

  1. The spring clips are small and would overheat at high current.
  2. The plastic base conducts current between the holes in the board.
  3. The clips are made of a material that insulates the leads.
  4. The holes are joined in groups of five by solder at the factory.
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Correct answer: The spring clips are small and would overheat at high current.

The small spring clips have little contact area, so they heat up at high current. A breadboard suits temporary, low-current work.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 5.8: Building Simple Resistor Circuits

Practice wiring and components

Questions last reviewed: 18 October 2026