A 3-pin power supply or cord is a standard electrical connection used to deliver alternating current (AC) to heavy-duty appliances and electronic devices. It incorporates an additional grounding pin for safety. This design is universally used for devices like desktop computers, televisions, and power adapters. [1, 2, 3, 4, 5]
The 3 pins serve specific roles to safely power your device: [1, 2]
Live (Line): Carries the electrical current from the power source to the appliance.
Neutral: Provides the return path for the current to complete the electrical circuit.
Earth (Ground): The third, often longer or thicker pin, which acts as a safety measure to direct leaking current safely into the ground, preventing electric shocks. [1, 2, 3]
Standard features of 3-pin power cables include:
Voltage & Current: Generally rated for 250V and can handle standard currents like 6A, 10A, or 16A depending on the appliance.
Connectors: Usually plugs into a standard wall outlet on one end, and features an IEC connector (e.g., C13 for monitors/PCs or C5 for laptops) on the device end.
Protection: Often built with heavy-duty PVC insulation and built-in protections against over-heating or short circuits. [1, 2, 3, 4, 5]
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