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david90
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If two 55 watts light is connected to a car's 12v battery, what amp rating relay should I get? 55/12 = 4.5 * 2 = 9amps? right?
A relay is an electronic switch that is used to control the flow of electricity to a circuit. It allows a low voltage signal to control a high voltage circuit, making it useful for controlling devices that require more power than a switch can handle.
A relay is necessary for two 55W lights because the total wattage of the lights exceeds the maximum load that a standard switch can handle. This can cause the switch to overheat and potentially fail. Using a relay ensures that the circuit is safely and efficiently powered.
For two 55W lights on a 12V battery, it is recommended to use a 12V DC relay with a minimum of 10A capacity. This will ensure that the relay can handle the power requirements of the lights without being overloaded.
To connect the relay, you will need to identify the input and output pins on the relay. The input pins will be connected to the low voltage control signal, usually from a switch. The output pins will be connected to the lights and the power source. It is important to follow the wiring diagram provided by the relay manufacturer.
Yes, you can use a single relay for multiple lights as long as the total wattage of the lights does not exceed the maximum load capacity of the relay. It is important to always check the specifications of the relay to ensure it can handle the power requirements of your lights.