Red Seal Industrial Electrician Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What distinguishes a contactor from a relay?

Contactors are used for high current loads

A contactor is specifically designed to handle high current loads, which makes it well-suited for controlling heavy machinery and industrial applications. These devices typically have larger contacts and are constructed to withstand the physical demands of high-power circuits, allowing them to safely switch large electrical currents without damage.

The capacity to manage high power sets contactors apart from standard relays, which are more commonly used in low-power applications. Relays, while capable of switching electrical circuits, are generally utilized for lower voltage and current situations compared to contactors.

This distinction is crucial because it affects the choice of device based on application requirements; using a contactor instead of a relay can ensure the safety and reliability in operations involving high electric loads. Understanding these differences helps in selecting appropriate components for electrical control systems.

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Relays operate at lower voltages only

Contactors are mechanical switches only

Relays cannot switch electrical circuits

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