Quick Answer
Install an automatic transfer switch (ATS) between the main electrical panel and a generator, ensuring the ATS is rated for the generator's power output and the home's electrical load. Use a hardwired connection and follow local electrical codes. Also, size the ATS according to the National Electric Code.
Choosing the Right ATS
When selecting an ATS, consider the generator’s power output, the home’s electrical load, and the ATS’s transfer switch rating. Typically, the ATS should be rated at 150% of the generator’s power output to account for startup surges. For example, if the generator produces 20 kW, choose an ATS rated for at least 30 kW (20 kW x 1.5). Additionally, ensure the ATS has a high transfer time (typically 10-15 milliseconds) to prevent power flicker and equipment damage.
Installation and Wiring Requirements
Install the ATS between the main electrical panel and the generator, following local electrical codes and regulations. Use a hardwired connection, and ensure all connections are secure and meet National Electric Code (NEC) standards. Size the ATS according to the NEC, which requires a minimum of 1/2 inch knockout holes and a 2-inch NEMA rating. Also, ground the ATS and the generator to prevent electrical shocks and ensure safe operation.
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