Relays can also be used to facilitate the switching of multiple components at the same time using a single output. Micro Relay Switches - Multiple Switching In such an event, the unwanted risk of causing an electrical fire or damaging cable wires may be encountered. It is unadviseable to hook up directly the headlights to the headlight switch as this could exceed the amperage rating of the switch. The most frequent example of this is the switching on of the vehicle's head lights. They are most commonly used to enable a low amperage circuit switch On or Off a higher amperage circuit. Relay circuit switches are found in most vehicles driving along our roads today. A relay switch (12v 20a relay) is an electrically operated switch that is used in applications that require the control of a circuit by a low-power signal, where the control and controlled circuits must be electrically isolated from one another.
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