Capacitor
An electrical component that stores energy in an electric field between two conductive plates, used for power factor correction, motor starting, and filtering.
Detailed Explanation
In electrical contracting, capacitors are primarily used for power factor correction in commercial and industrial settings, reducing utility penalties and improving system efficiency. Motor-start capacitors provide the extra torque needed to start single-phase motors. NEC Article 460 covers capacitor installation requirements, including discharge time limits (reducing stored voltage to 50V or less within 1 minute for 1000V or less systems).
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